Hydrological, Meteorological and Coastal Oceanographic Sensors, Data Collection Platforms and Telemetry Communication Systems
About Stevens Water
Stevens Water Monitoring Systems, Inc. is a manufacturer and marketer of integrated hydrological, meteorological and oceanographic monitoring instrumentation, accessories and information systems that help optimize water resource management and enhance forecasting. Stevens first understands the customers' objectives and then provides an applicable system that consists of electronic sensors, data logging and process control instruments, communication equipment and necessary software for data presentation to help the customer understand environmental conditions and efficiently execute decisions. Stevens sells hydrological, meteorological and coastal oceanographic sensors, data collection platforms and telemetry communication systems for governments and industries that monitor and manage the environmental conditions, with emphasis on water resources. Services include first and foremost a customer service support staff to assure our customers' success. Other Stevens's services include engineering support on systems design, installation and commissioning; on-going monitoring station maintenance; and data collection and management Targeted Environmental Market Segments Stevens is the "HMO" to measuring and monitoring the health of our environmental conditions. Stevens focus targets on the following market segments that provide information to help better understand and manage our water resources: Hydrological - the measurement of water level, water flow and water quality in streams, rivers, ponds, estuaries, irrigation canals, lakes, reservoirs and aquifers; Meteorological - flood warning / forecast and weather station configurations defined as hydromet stations and agricultural stations; and Oceanographic - tide gauge and current measurements for shipping channels, water quality, and tsunami warning. Stevens also provides related PC / PDA instrument configuration and data management software and on-line data collection and management services. With established expertise in water monitoring applications, the integration of Vitel, Inc., the strategic alliances, such as Greenspan Technologies / Tyco, and the hiring of leading experts, Stevens is well positioned to provide customers the best solutions in water, soil and related weather monitoring for applications such as: Surface water resources Flood warning Wastewater industries Coastal and estuaries Hydropower utilities Agricultural / irrigation Water utilities Climatologically studies / forecasts Golf courses / sports turf Ground water Tide Gaging Stormwater Management
Stevens Water Monitoring Systems, Inc. is a manufacturer and marketer of integrated hydrological, meteorological and oceanographic monitoring instrumentation, accessories and information systems that help optimize water resource management and enhance forecasting. Stevens first understands the customers' objectives and then provides an applicable system that consists of electronic sensors, data logging and process control instruments, communication equipment and necessary software for data presentation to help the customer understand environmental conditions and efficiently execute decisions.
Stevens sells hydrological, meteorological and coastal oceanographic sensors, data collection platforms and telemetry communication systems for governments and industries that monitor and manage the environmental conditions, with emphasis on water resources. Services include first and foremost a customer service support staff to assure our customers' success. Other Stevens's services include engineering support on systems design, installation and commissioning; on-going monitoring station maintenance; and data collection and management
Targeted Environmental Market Segments
Stevens is the "HMO" to measuring and monitoring the health of our environmental conditions. Stevens focus targets on the following market segments that provide information to help better understand and manage our water resources:
Stevens also provides related PC / PDA instrument configuration and data management software and on-line data collection and management services.
With established expertise in water monitoring applications, the integration of Vitel, Inc., the strategic alliances, such as Greenspan Technologies / Tyco, and the hiring of leading experts, Stevens is well positioned to provide customers the best solutions in water, soil and related weather monitoring for applications such as:
Data Loggers & Telemetry
Data Loggers and Acquisition InstrumentsDOT Logger The Data Online Telemetry (DOT) Logger is a flexible, compact, inexpensive, easy to use data-logging instrument specifically designed for intensive environmental monitoring applications. Telemetry options such as phone, radio or satellite communications are easily integrated with the DOT.AxSys MPU Data Acquisition Instrument The AxSys is a data acquisition instrument used by organizations responsible for water resource management and control. The AxSys complete design includes programmable keypad, display and data card interface all in a compact NEMA 4 enclosure. AxSys Flowmeter Data Acquisition Instrument The AxSys Flowmeter is a data acquisition instrument used by organizations responsible for water resource management and control. The AxSys Flowmeter features a programmed rating table to automatically calculated and report on water flow.AxSys CCR (4-20mA input) Circular Chart Recorder (CCR) The AxSys Circular Chart Recorder (CCR) is designed to collect data on multiple parameters and to chart any one of those parameters of interest for a quick visual measurement on paper. Typically, the CCR is used as a flowmeter that is programmed to provide instantaneous flow rate value. The CCR is physically designed for an easy Stevens 61R mechanical flowmeter retrofit. Telemetry & Wireless Data Communications Data telemetry can simplify and speed the acquisition of critical information from remote locations. Stevens has been a pioneer in telemetry applications for environmental data collection since its development of the first remote environmental monitoring telemetry system, Telmark. Satellite Bouncing an RF signal off a satellite is one of the best options for remote installations, especially in locations where no other reliable RF or telephone coverage is available. Satellite is also recommended when infrastructure cost (such as the need to use repeaters for a non-satellite system) is an issue. There are two main types of satellite systems that offer remote environmental monitoring type applications: Low-Earth Orbit (LEO) and Geosynchronous Orbit (GEO). HDR Transmitters The Stevens GOES HDR (high data rate) Transmitter (Model GHT) provides access to the NOAA/NESDIS GOES Data Collection System (DCS) for Stevens or third party data loggers and sensors deployed in environmental monitoring and data acquisition applications. The Stevens GOES HDR is easy to program and operates as an ASCII modem for use with most data loggers capable of exporting data packets through their serial port. ORBCOMM Low Earth Orbiting (LEO) Satellite Data Communication System ORBCOMM is a low earth orbiting (LEO) satellite data communication system that is two-way and provides worldwide coverage. The ORBCOMM Satellite Transceiver (two-way) is easy to install at a relative low cost and minimal maintenance requirements. Stevens is ORBCOMM's VAR (Value Added Reseller) for environmental data transmission. Data interaction is via e-mail or using E-Monitoring Internet Data Management. Radio Radio telemetry is one method of transmitting data. Licensed and unlicensed radio telemetry may require line-of-site between the monitoring system and the base station. Antenna positioning, gain, tuning, ambient frequency, noise, atmospheric conditions and terrain are important variables affecting range -- however, transmissions can be repeated if interference is present. Click on any of the radio telemetry solution to learn more about the solution and its advantages & disadvantages: UHF or VHF Radio TS4000 incorporates a wide range of high performance radio modules, which meet the stringent demands of both domestic and international regulatory agencies. Advanced features include address selective store-and-forward data repeating, multilevel packet management, and remote system adjustment and network wide diagnostics. Bluetooth® The Shark is an efficient and economical solution in converting your data logger or industrial equipment into a Bluetooth® enable communication instrument. The Shark is Stevens' RS232 or RS485 wireless serial cable replacement product designed using Bluetooth® wireless technology for industrial and the environmental monitoring applications. Its robust design will handle many extreme environmental conditions and power management concerns. It uses the Bluetooth® SPP (serial port profile) protocol to replace RS232 or RS485 cables. The Shark will communicate with another Shark or with any Bluetooth® enabled device. Telephone A telephone telemetry connection is established between the two parties and the data is passed. While utilization of the wired Public Switch Telephone Network (PSTN) is a well establish and reliable telemetry solution, the technology and coverage of cellular data telemetry systems has greatly improved and rapidly gaining as an alternative to telephone or other telemetry solutions. Cell Phone Modems The CDSB-6/Moto's microcomputer controls the cellular transceiver and modem as one device. The intelligent power management system includes a 3-watt Motorola cellular radio and allows the user to remotely program all of the modem options, functions and power management. The modem performs well with situations common to cellular systems such as hand-off, distortion, and varying signal conditions. Low Power Phone Modems Low-powered Environmental Phone Modem 2400 bit is a land-line phone modem designed to operate in extreme environmental conditions from -40 C to 85 C. Includes auto-dial and auto answering, "AT" command set, and IEEE 472 surge protection. Basic Phone Modems The VX1040 is designed for installations in a rack mount configuration or as a stand-alone unit. Satellite Antennas V4TH Antenna The Stevens V4TH and V2TH Satellite Antenna provides a cost effective, high performance geostationary satellite data telemetry link for hydrological and meteorological data transmissions. The helix design virtually eliminates all existing problems that occur with other available antenna technology. V2TH Antennas The Stevens V4TH and V2TH Satellite Antenna provides a cost effective, high performance geostationary satellite data telemetry link for hydrological and meteorological data transmissions. The helix design virtually eliminates all existing problems that occur with other available antenna technology. The V4TH and V2TH Antennas have a 10 dB gain and 5.5 dB gain, respectively. These antennas are designed to operate through the destructive forces of severe weather.
The Data Online Telemetry (DOT) Logger is a flexible, compact, inexpensive, easy to use data-logging instrument specifically designed for intensive environmental monitoring applications. Telemetry options such as phone, radio or satellite communications are easily integrated with the DOT.
The AxSys is a data acquisition instrument used by organizations responsible for water resource management and control. The AxSys complete design includes programmable keypad, display and data card interface all in a compact NEMA 4 enclosure.
The AxSys Flowmeter is a data acquisition instrument used by organizations responsible for water resource management and control. The AxSys Flowmeter features a programmed rating table to automatically calculated and report on water flow.
The AxSys Circular Chart Recorder (CCR) is designed to collect data on multiple parameters and to chart any one of those parameters of interest for a quick visual measurement on paper. Typically, the CCR is used as a flowmeter that is programmed to provide instantaneous flow rate value. The CCR is physically designed for an easy Stevens 61R mechanical flowmeter retrofit.
Data telemetry can simplify and speed the acquisition of critical information from remote locations. Stevens has been a pioneer in telemetry applications for environmental data collection since its development of the first remote environmental monitoring telemetry system, Telmark.
Bouncing an RF signal off a satellite is one of the best options for remote installations, especially in locations where no other reliable RF or telephone coverage is available. Satellite is also recommended when infrastructure cost (such as the need to use repeaters for a non-satellite system) is an issue. There are two main types of satellite systems that offer remote environmental monitoring type applications: Low-Earth Orbit (LEO) and Geosynchronous Orbit (GEO).
HDR Transmitters
The Stevens GOES HDR (high data rate) Transmitter (Model GHT) provides access to the NOAA/NESDIS GOES Data Collection System (DCS) for Stevens or third party data loggers and sensors deployed in environmental monitoring and data acquisition applications. The Stevens GOES HDR is easy to program and operates as an ASCII modem for use with most data loggers capable of exporting data packets through their serial port.
ORBCOMM Low Earth Orbiting (LEO) Satellite Data Communication System
ORBCOMM is a low earth orbiting (LEO) satellite data communication system that is two-way and provides worldwide coverage. The ORBCOMM Satellite Transceiver (two-way) is easy to install at a relative low cost and minimal maintenance requirements. Stevens is ORBCOMM's VAR (Value Added Reseller) for environmental data transmission. Data interaction is via e-mail or using E-Monitoring Internet Data Management.
Radio telemetry is one method of transmitting data. Licensed and unlicensed radio telemetry may require line-of-site between the monitoring system and the base station. Antenna positioning, gain, tuning, ambient frequency, noise, atmospheric conditions and terrain are important variables affecting range -- however, transmissions can be repeated if interference is present. Click on any of the radio telemetry solution to learn more about the solution and its advantages & disadvantages:
UHF or VHF Radio
TS4000 incorporates a wide range of high performance radio modules, which meet the stringent demands of both domestic and international regulatory agencies. Advanced features include address selective store-and-forward data repeating, multilevel packet management, and remote system adjustment and network wide diagnostics.
Bluetooth®
The Shark is an efficient and economical solution in converting your data logger or industrial equipment into a Bluetooth® enable communication instrument.
The Shark is Stevens' RS232 or RS485 wireless serial cable replacement product designed using Bluetooth® wireless technology for industrial and the environmental monitoring applications. Its robust design will handle many extreme environmental conditions and power management concerns. It uses the Bluetooth® SPP (serial port profile) protocol to replace RS232 or RS485 cables. The Shark will communicate with another Shark or with any Bluetooth® enabled device.
A telephone telemetry connection is established between the two parties and the data is passed. While utilization of the wired Public Switch Telephone Network (PSTN) is a well establish and reliable telemetry solution, the technology and coverage of cellular data telemetry systems has greatly improved and rapidly gaining as an alternative to telephone or other telemetry solutions.
Cell Phone Modems
The CDSB-6/Moto's microcomputer controls the cellular transceiver and modem as one device. The intelligent power management system includes a 3-watt Motorola cellular radio and allows the user to remotely program all of the modem options, functions and power management. The modem performs well with situations common to cellular systems such as hand-off, distortion, and varying signal conditions.
Low Power Phone Modems
Low-powered Environmental Phone Modem 2400 bit is a land-line phone modem designed to operate in extreme environmental conditions from -40 C to 85 C. Includes auto-dial and auto answering, "AT" command set, and IEEE 472 surge protection.
Basic Phone Modems
The VX1040 is designed for installations in a rack mount configuration or as a stand-alone unit.
V4TH Antenna
The Stevens V4TH and V2TH Satellite Antenna provides a cost effective, high performance geostationary satellite data telemetry link for hydrological and meteorological data transmissions. The helix design virtually eliminates all existing problems that occur with other available antenna technology.
V2TH Antennas
The V4TH and V2TH Antennas have a 10 dB gain and 5.5 dB gain, respectively. These antennas are designed to operate through the destructive forces of severe weather.
Water Level Measurement Sensors & Chart Recorders
Water Level Measurement Sensors Stevens is the original water level measurement instrument company with the introduction of the widely know chart recorders introduced in 1911. Today, Stevens offers a wide selection of water level measurement sensors included robust ceramic pressure sensors, various shaft encoders, acoustical sensor, and the visual reference staff gages. Stevens still offers the low-powered, mechanical chart recorders for a long-term uninterrupted, real-time chart of water level.Pressure Sensors Pressure sensors are submerged at a fixed level under the water surface. The pressure sensor measures the equivalent hydrostatic pressure of the water above the senor diaphragm. It is like weighing the water.Encoders / Floats Encoders, potentiometers, linear variable differential transformers, and syncrhos are float-operated sensors using a float and counter weight attached to a cable or line that is place around the float-operated sensor's pulley.Staff Gages The Staff Gage provides a quick and easy visual indicator of water level that is made with a durable baked-on porcelain enamel finish on a metal plate. Stevens was the company who originally designed and introduced the staff gage measurement styles used by the water resource market. Stevens is one of the leading designers and providers of custom staff gages. Customer staff gages are for large size, slopes or flow measurements or for other unique mounting angles that a site may require for a easy visual measurement. Chart Recorders Stevens is the original chart recorder company for measuring water and other liquid levels. Over 40,000 of these instruments have been installed worldwide. Many are incorporated with an electronic encoder attachment to provide an undisputed, legally defensible paper source of level to any electronic sensor measuring and reporting on level. For example, the picture to the left is recording level at the U.S. strategic oil reserve using a Type F and Stevens’s shaft encoder with the AxSys data logger. Chart recorders are still the only true real-time measurement of level in remote monitoring applications. Type A Chart Recorders The Type A Chart Recorder is the world's most time-proven standard for real-time, long-term water or tank level measurement in a graphical format. The Type A is used either as a primary device or as a very reliable backup instrument to record water level. A single chart can provide up to 6 months of continuous level recording. Type F Chart Recorders The Type F Chart Recorder is a portable recorder that provides a continuous water or tank level record in graphical format. The Type F is used either as a primary device or as a very reliable backup instrument to record water or tank level. A single chart can provide up to 32 days of continuous level recording.AxSys Circular Chart Recorders (CCR) The AxSys Circular Chart Recorder (CCR) is designed to collect data on multiple parameters and to chart any one of those parameters of interest for a quick visual measurement. Typically, the CCR is used as a flowmeter that is programmed to provide instantaneous flow rate value. The CCR is physically designed for an easy Stevens 61R mechanical flowmeter retrofit.Electro-AV Recorders The Stevens Electro-AV Recorder is a 10" wide strip chart recorder and data logger designed primarily for water level gaging applications and reservoir management. It accepts a serial RS-232 encoded signal, which is interpreted to produce pen movement. The signal represents an absolute level indication. Includes dedicated wire links to optional telemetry for transmission to other locations. The optional digital display provides a continuous, 5-digit readout that exactly duplicates the transmitting device reading. 61R Chart Recorders Stevens 61R Chart Recorder was installed in thousands of water and wastewater flow measurement applications. Many 61R Chart Recorders are still in operations today. Stevens still provides limited repair service to the 61R as parts are available. The 61R was discontinued in 2000 and replaced with the Stevens AxSys CCR. The physical design of the AxSys CCR makes retrofitting existing locations with Stevens 61R Chart Recorders very easy.Electro Chart Drives (ECD) The Stevens Electro Chart Drive (ECD) is an instrument that interprets signals on a SDI-12 communications line and provides an output for driving a Stevens Type A or Type F Recorder to chart any electronic level sensor gaging system such as a pressure sensor. An output is also available for input to a data logger.
Stevens is the original water level measurement instrument company with the introduction of the widely know chart recorders introduced in 1911. Today, Stevens offers a wide selection of water level measurement sensors included robust ceramic pressure sensors, various shaft encoders, acoustical sensor, and the visual reference staff gages. Stevens still offers the low-powered, mechanical chart recorders for a long-term uninterrupted, real-time chart of water level.
Pressure sensors are submerged at a fixed level under the water surface. The pressure sensor measures the equivalent hydrostatic pressure of the water above the senor diaphragm. It is like weighing the water.
Encoders, potentiometers, linear variable differential transformers, and syncrhos are float-operated sensors using a float and counter weight attached to a cable or line that is place around the float-operated sensor's pulley.
The Staff Gage provides a quick and easy visual indicator of water level that is made with a durable baked-on porcelain enamel finish on a metal plate. Stevens was the company who originally designed and introduced the staff gage measurement styles used by the water resource market.
Stevens is one of the leading designers and providers of custom staff gages. Customer staff gages are for large size, slopes or flow measurements or for other unique mounting angles that a site may require for a easy visual measurement.
Stevens is the original chart recorder company for measuring water and other liquid levels. Over 40,000 of these instruments have been installed worldwide. Many are incorporated with an electronic encoder attachment to provide an undisputed, legally defensible paper source of level to any electronic sensor measuring and reporting on level. For example, the picture to the left is recording level at the U.S. strategic oil reserve using a Type F and Stevens’s shaft encoder with the AxSys data logger. Chart recorders are still the only true real-time measurement of level in remote monitoring applications.
Type A Chart Recorders
The Type A Chart Recorder is the world's most time-proven standard for real-time, long-term water or tank level measurement in a graphical format. The Type A is used either as a primary device or as a very reliable backup instrument to record water level. A single chart can provide up to 6 months of continuous level recording.
Type F Chart Recorders
The Type F Chart Recorder is a portable recorder that provides a continuous water or tank level record in graphical format. The Type F is used either as a primary device or as a very reliable backup instrument to record water or tank level. A single chart can provide up to 32 days of continuous level recording.
The AxSys Circular Chart Recorder (CCR) is designed to collect data on multiple parameters and to chart any one of those parameters of interest for a quick visual measurement. Typically, the CCR is used as a flowmeter that is programmed to provide instantaneous flow rate value. The CCR is physically designed for an easy Stevens 61R mechanical flowmeter retrofit.
The Stevens Electro-AV Recorder is a 10" wide strip chart recorder and data logger designed primarily for water level gaging applications and reservoir management. It accepts a serial RS-232 encoded signal, which is interpreted to produce pen movement. The signal represents an absolute level indication. Includes dedicated wire links to optional telemetry for transmission to other locations.
The optional digital display provides a continuous, 5-digit readout that exactly duplicates the transmitting device reading.
61R Chart Recorders
Stevens 61R Chart Recorder was installed in thousands of water and wastewater flow measurement applications. Many 61R Chart Recorders are still in operations today. Stevens still provides limited repair service to the 61R as parts are available.
The 61R was discontinued in 2000 and replaced with the Stevens AxSys CCR. The physical design of the AxSys CCR makes retrofitting existing locations with Stevens 61R Chart Recorders very easy.
The Stevens Electro Chart Drive (ECD) is an instrument that interprets signals on a SDI-12 communications line and provides an output for driving a Stevens Type A or Type F Recorder to chart any electronic level sensor gaging system such as a pressure sensor. An output is also available for input to a data logger.
Water Quality Analyzers, Sensors & Software
Stevens, with its Tyco / Greenspan strategic alliance, offers a product line of water quality analyzers, water quality multi-parameter sensors, and water quality single parameter sensor, all designed for long-term, unattended monitoring and analysis. Multi-Parameter Sensors Stevens range of single water quality parameter sensors, which are a cost-effective alternative solution to a multi-parameter sensor for those interested in only one or two of the following water parameters. Dissolved Oxygen Electric conductivity pH Turbidity /TSS Oxidation Reduction Potential (ORP) Analyzers Stevens / Greenspan analyzers perform chemical and physical water analyses automatically using standard laboratory methods for laboratory-comparable results. Chemical parameters include: Nutrients:-Ammonia/Ammonium-Nitrate-Phosphate Total Phosphorous and dissolved reactive phosphate Total Nitrogen Total Organic Carbon When combined with external-monitoring equipment, the analyzer can provide you with a comprehensive environmental monitoring system. Software Stevens' mission is to design and provide our customers with instruments that are easy to configure and use. An integral element towards this mission is enabling our sensors, loggers and telemetry modems to provide outputs that can easily be processed by other third party databases, data management, modeling, forecasting or GLS software programs. Stevens provides various software programs under the following categories: On-Line Data Management Service Data Management Programs Instrument Setup / Configuration Programs Programs to DownloadOn-Line Data Management Services Stevens offers two Internet Data Managment services on line: E-Monitoring.net GOESLink.com Both these services collect the data from remote monitoring locations phone modem or other wireless telemetry procedures and permanently stores the data in a data base that can be accessed any time from any computer with Internet access. Advantages to these services include: Users need no customized software program. Users require no special or dedicated computer hardware and base station reception equipment. Users require no special training or knowledge of data management programs or hardware. Automatically incorporates a backup data management procedures for the users. Data security is enhanced with automatic off site storage.Data Management Programs Stevens offers the following Data Managment Programs for use on a lap top computer for field analysis, and for use as a base station management, control and analysis program for multiple montitoring locations: GOESLink with Microsoft SQL for Satellite DRGS DAQ Factory Data Acquisition and Control AquaGraph Logger Suite for PC and for PDA AxReadInstrument Setup/Configuration Programs For Stevens’s instruments, Stevens provides the following software programs for easy setup and configurations: GHT Set (for the Stevens GOES HDR Transmitter) Logger Suite (for the Stevens DOT Logger) AxSet (for the Stevens AxSys data logger) SmartComm (for the Stevens/Greenspan data logging pressure sensors and water quality sensors)Programs to Download The following are software programs for viewing the Hydra Probe measurements, axread 3.0 and Greenspan. Please see the user manual for more detail information on these programs. Hydra Probe soil sensor executable routines AXREAD 3.2 Greenspan
Stevens, with its Tyco / Greenspan strategic alliance, offers a product line of water quality analyzers, water quality multi-parameter sensors, and water quality single parameter sensor, all designed for long-term, unattended monitoring and analysis.
Stevens range of single water quality parameter sensors, which are a cost-effective alternative solution to a multi-parameter sensor for those interested in only one or two of the following water parameters.
Stevens / Greenspan analyzers perform chemical and physical water analyses automatically using standard laboratory methods for laboratory-comparable results. Chemical parameters include:
When combined with external-monitoring equipment, the analyzer can provide you with a comprehensive environmental monitoring system.
Stevens' mission is to design and provide our customers with instruments that are easy to configure and use. An integral element towards this mission is enabling our sensors, loggers and telemetry modems to provide outputs that can easily be processed by other third party databases, data management, modeling, forecasting or GLS software programs.
Stevens provides various software programs under the following categories:
On-Line Data Management Service Data Management Programs Instrument Setup / Configuration Programs Programs to Download
Stevens offers two Internet Data Managment services on line:
Both these services collect the data from remote monitoring locations phone modem or other wireless telemetry procedures and permanently stores the data in a data base that can be accessed any time from any computer with Internet access. Advantages to these services include:
Stevens offers the following Data Managment Programs for use on a lap top computer for field analysis, and for use as a base station management, control and analysis program for multiple montitoring locations:
For Stevens’s instruments, Stevens provides the following software programs for easy setup and configurations:
The following are software programs for viewing the Hydra Probe measurements, axread 3.0 and Greenspan. Please see the user manual for more detail information on these programs.
Soil Moisture Sensors
Hydra Probe Sensors The Stevens Hydra Probe and Hydra Probe II perform high frequency electrical measurements of the capacitive and conductive properties of sand, silt or clay soil which are directly related to simultaneous measurements of: Soil moisture Soil salinity Soil temperature and 19 other user-selectable parameters The Hydra Probe precisely defined sensing area allows accurate measurements in regions where there are strong soil moisture gradients, such as near the soil surface. Response time is immediate to changing soil moisture conditions, and no calibration is required. The Hydra Probe contains conversion circuitry so that all output is digital (RS 485 or SDI 12) unless analog output is specified at purchase. Hand Held Hydra Data Readers The Stevens' Portable Hydra Reader is designed for teams using or requiring analog output from the Hydra Probe soil sensor systems. The Hydra Reader acquires, displays, and logs data directly from the Hydra Probe. The Hydra Reader converts raw Hydra Probe voltages directly into soil moisture, salinity, and temperature readings without requiring any further processing or calibration. Data can then be logged, stored and downloaded to a PC for analysis, or the unit may be put in direct read only mode. The Hydra Reader downloads data to a PC for archiving, graphical presentation, and report generation. Software makes downloading simple and the data may be customized to specific user needs.The Hydra Reader is a compact, lightweight package that has no maintenance requirements.
The Stevens Hydra Probe and Hydra Probe II perform high frequency electrical measurements of the capacitive and conductive properties of sand, silt or clay soil which are directly related to simultaneous measurements of:
The Hydra Probe precisely defined sensing area allows accurate measurements in regions where there are strong soil moisture gradients, such as near the soil surface. Response time is immediate to changing soil moisture conditions, and no calibration is required. The Hydra Probe contains conversion circuitry so that all output is digital (RS 485 or SDI 12) unless analog output is specified at purchase.
The Stevens' Portable Hydra Reader is designed for teams using or requiring analog output from the Hydra Probe soil sensor systems. The Hydra Reader acquires, displays, and logs data directly from the Hydra Probe. The Hydra Reader converts raw Hydra Probe voltages directly into soil moisture, salinity, and temperature readings without requiring any further processing or calibration. Data can then be logged, stored and downloaded to a PC for analysis, or the unit may be put in direct read only mode.
The Hydra Reader downloads data to a PC for archiving, graphical presentation, and report generation. Software makes downloading simple and the data may be customized to specific user needs.The Hydra Reader is a compact, lightweight package that has no maintenance requirements.
Weather Sensors, Staff Gages & Accessories
Weather Sensors Weather conditions are often an integral element in water resource and irrigation management applications. Weather parameters are frequently used in understanding and modeling environmental applications that are dependent on water resources. Stevens provides top quality and industry leading weather sensors that are easily deployed into an integrated environmental monitoring and control system.Tipping Bucket Rain Gage The Tipping Bucket Rain Gage is a WMO recognized standard for measuring precipitation in remote, unattended locations designed with a siphon system for improved accuracy, especially during high rainfall events.Ultrasonic Wind Direction & Speed Sensor The Met One Ultrasonic Wind Direction & Speed sensor is highly accurate with no moving parts, which eliminates required maintenance common to mechanical sensors. This 16-point wind tunnel calibrating sensor provides digital and analog outputs. Available in heated option.RMY Wind Speed & Direction Sensor The RMY Wind Speed & Direction sensor is a high performance, rugged time proven design ideal for a wide range of wind measuring applications. The wind speed sensor is a four blade helicoid propeller. Propeller rotation produces an AC sine wave voltage signal with frequency directly proportional to wind speed. Slip rings and brushes are eliminated for increased reliability. The wind direction sensor is a rugged, yet lightweight vane with a sufficiently low aspect ratio to assure good fidelity in fluctuating wind conditions.Relative Humidity & Temperature Sensor The Rotronic Hygroclip S3 combines advanced microprocessor and ASIC technology with a robust plug-in design for easy integration into any system: digital input/output, two analog outputs, plus a large choice of connectors, extension cables, and signal adapters. Operating range is 0% to 100% relative humidity and -40 to 85°C. The Stevens solar radiation shield in photo sold separately.Solar Radiation SP LITE Pyranometer The Li-Cor SP-LITE Pyranometer is designed for measurement of global hemispherical solar radiation under all weather conditions. The SP-LITE solar radiation sensor is ideal for agricultural plant growth, evapotranspiration estimation, and PV/Solar energy module monitoring or air pollution dispersion calculations. Staff Gages A staff gage provides a quick and easy visual indicator of water level and this is made with a durable porcelain enamel finish to resist corrosion. Stevens was the company who originally designed and introduced the staff gage measurement styles used by the water resource market. Staff gages are available in several styles to fit your application needs: Style A Style C Style E Style I Style M Figure Plates Stevens is one of the leading designers and providers of custom staff gages. They are individually designed for large size, slopes or flow measurements or for other unique mounting angles that an off-the-shelf staff gage cannot measure. Custom Staff Gages Custom Staff Gages - In addition to Stevens being the original designer and leading supplier of Style A, C, E, I and M staff gages, Stevens is also a leader in designing and providing custom staff gages for applications requiring larger displays, unique mounting angles and slopes and visual flow measurements. Accessories Stevens has a wide selection of accessories for information collection and minor repair/replacement parts for your water monitoring stations. Float Accessories for Water Level Measurement Shaft Encoder Parts - Replacement screws, clamps and flanges for your Stevens Shaft Encoder. Pulleys - Replacement pulley's for your Stevens float operated recorders and encoders. Float Tape - Stainless steel float tape with pre-punched holes on 2.4, 3 and 6 inch centers. Beaded float line - Stainless steel float lines with crimped brass beads on 12.5cm, 3 or 6 in. spacing. Float Line accessories - Unbeaded float line, End hooks, Index Bracket. Copper Floats - Painted copper floats from 2.5" to 18" diameter. Stainless Steel Floats - Polished stainless steel floats from 2.5" to 12" diameter. PVC Floats - Floats for small diameter / deep well applications. Counterweights - Stainless steel counterweights from 3 oz. to 20 oz. Chart Recorder Accessories Mechanical Chart Recorder Parts - Replacement parts for your Stevens chart recorders. Paper Charts - Replacement paper charts for your Stevens Chart Recorders. Pens & Ink - Replacement Pens & Ink for your Stevens Chart Recorders. Quartz Multispeed Timer - Replacement for Type A or F battery (DC) operated electronic clock. Power Supply Accessories Batteries - Standard replacement batteries for your Stevens products. Power Supplies - Standard replacement power supplies for your Stevens products. Solar Panels - Standard replacement solar panels for your Stevens products. JL2U Solar Panel Battery Chargers & Regulators- Temperature compensated, tapered solar panel charge controller. Data Acquisition Accessories Antennas - Cell Phone Modem, UHF/VHF radios, GPS, LEO/GOES satellite. Battery Charger - 12V battery charger for 9 to 24 amp hour batteries. When used with AC, can be used as a power supply backup system. (Batter Charger instructions PDF) Data Cards (pdf) - Standard replacement data cards for your Stevens products. Card Reader - OmniDrive. Programmable Position Monitors (pdf) - A "smart interpreter" which accepts the signal from a position transmitter, scales the signal, and then outputs it on a five-digit display. RS 232 to SDI-12 converter - Used to network Greenspans smart pressure and water quality sensors with other data loggers accepting a SDI-12 input. 4-20 mA to SDI-12 Converter - Converts up to 2 sensors providing a 4-20 mA output to an SDI-12 output. Other Accessories Technical Resources - Water resource guidebook. Staff Gages - Porcelain enameled, 5 different standard styles, numbered figure plates or customizable to your specifications .(pdf file of overview and specs) Cables & Connectors - Replacement cables for your Stevens Products.
Weather conditions are often an integral element in water resource and irrigation management applications. Weather parameters are frequently used in understanding and modeling environmental applications that are dependent on water resources. Stevens provides top quality and industry leading weather sensors that are easily deployed into an integrated environmental monitoring and control system.
The Tipping Bucket Rain Gage is a WMO recognized standard for measuring precipitation in remote, unattended locations designed with a siphon system for improved accuracy, especially during high rainfall events.
The Met One Ultrasonic Wind Direction & Speed sensor is highly accurate with no moving parts, which eliminates required maintenance common to mechanical sensors. This 16-point wind tunnel calibrating sensor provides digital and analog outputs. Available in heated option.
The RMY Wind Speed & Direction sensor is a high performance, rugged time proven design ideal for a wide range of wind measuring applications. The wind speed sensor is a four blade helicoid propeller. Propeller rotation produces an AC sine wave voltage signal with frequency directly proportional to wind speed. Slip rings and brushes are eliminated for increased reliability. The wind direction sensor is a rugged, yet lightweight vane with a sufficiently low aspect ratio to assure good fidelity in fluctuating wind conditions.
The Rotronic Hygroclip S3 combines advanced microprocessor and ASIC technology with a robust plug-in design for easy integration into any system: digital input/output, two analog outputs, plus a large choice of connectors, extension cables, and signal adapters. Operating range is 0% to 100% relative humidity and -40 to 85°C. The Stevens solar radiation shield in photo sold separately.
The Li-Cor SP-LITE Pyranometer is designed for measurement of global hemispherical solar radiation under all weather conditions. The SP-LITE solar radiation sensor is ideal for agricultural plant growth, evapotranspiration estimation, and PV/Solar energy module monitoring or air pollution dispersion calculations.
A staff gage provides a quick and easy visual indicator of water level and this is made with a durable porcelain enamel finish to resist corrosion. Stevens was the company who originally designed and introduced the staff gage measurement styles used by the water resource market. Staff gages are available in several styles to fit your application needs:
Stevens is one of the leading designers and providers of custom staff gages. They are individually designed for large size, slopes or flow measurements or for other unique mounting angles that an off-the-shelf staff gage cannot measure.
Custom Staff Gages
Custom Staff Gages - In addition to Stevens being the original designer and leading supplier of Style A, C, E, I and M staff gages, Stevens is also a leader in designing and providing custom staff gages for applications requiring larger displays, unique mounting angles and slopes and visual flow measurements.
Stevens has a wide selection of accessories for information collection and minor repair/replacement parts for your water monitoring stations.
Float Accessories for Water Level Measurement
Chart Recorder Accessories
Power Supply Accessories
Data Acquisition Accessories
Other Accessories
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