Mainstream Permanent Flowmeter with Basic and 4:20mA Output Options
The Mainstream Permanent has proved itself to be one of the most reliable and efficient open channel flowmeters available on the market today. Reliable, high performance and quick to install, Mainstream ultrasonic area-velocity flowmeters are finding wide application internationally. For flow measurement in open channels and part-filled pipes, with liquids from clean water to raw sewage, the Mainstream flowmeter provides the highest quality performance at the most competitive price.
Optimal performance is maintained by a processor embedded in the submerged probe which adjusts operation according to the prevailing conditions. The probe may be located up to 500 metres from the system unit and measures flow velocities from less than 0.02 m/S up to 5 m/S.
The system unit displays liquid level, flow velocity, flow rate and totalized flow. Analog outputs transmit flow information and opto-isolated switches can activate alarms or operate samplers. An integral data logger stores measured and calculated information for graphing or analysis.
System Unit
- Rugged aluminium housing for permanent installation
- Dimensions 360 mm high x 160 mm wide x 90 mm deep. Weight 4 kg
- Environmental protection to IP65. IP68 available
Velocity Probe
- Streamlined mPVC moulding. Dimensions 105 mm long x 50 mm wide x 20 mm high. Cable exit and pressure sensor mounting at rear
- Reinforced cable – standard length 10 m, maximum length 500 m
- Intrinsically safe option to EEx ia IIC T5(-20°C to +40°C)/T4(-20°C to +80°C)
Measurement Display
- Large character LCD configurable for most engineering units. Display sequence is user selectable from date, time, level, flow cross-sectional area, signal quality, flow velocity, flow rate, quantity of flow in last hour and total flow quantity
- LCD legend available in various languages
Switch Outputs
- Two opto-isolated switch outputs, each rated at 60V ac/dc and 250 mA maximum current
- Switches independently programmable to open or close at a user defined level, ultrasound signal quality, velocity or flow rate.
- Switches also configurable to generate pulses to indicate a user defined flow quantity
Power Supply
- Nominal 24V dc (18 to 30V) at 200 mA maximum current (optional 4:20 mA outputs operating in active mode)
- Auxiliary 12V dc input for low power (battery) applications and uninterruptible operation. Low power operating modes down to 2 Ah per month
Level Sensor
- Stainless steel pressure transmitter with desiccant protected atmospheric reference
- Sensor interface fully compatible with alternative level sensors providing 4:20 mA signals
Local Communications
- RS232 compatible local serial port
- Automatic error detection protocol
PC Software
- Windows 98, Me, 2000 and XP compatible
- Mainstream Communicator software included with each flowmeter
- Intuitive point-and-click user interface for flowmeter configuration, diagnostics and real-time displays
- Features include graphical interface to input the pipe/channel cross-section, simple level sensor calibration procedure, real time displays of measurements and velocity histogram, facilities for remote diagnostics, plus backup and restore of Mainstream configuration
Data Logger
- Integral data logger with recording rate configurable for 30 seconds, 1, 2, 3, 5, 6, 10, 12, 15, 20, 30 or 60 minute intervals
- Facility to organise logged data into daily records with user selectable start time
- Logger capacity approximately 250,000 measurements corresponding to more than 6 months data at 2 minute intervals
- Logger incorporates data compression for rapid data retrieval using Mainstream Communicator software
- Recorded measurements output in spreadsheet compatible format
Performance
- Bi-directional velocity measurement with better than 100:1 turndown ratio
- Velocity measurement range from 10 mm/S to 5 m/S
- Resolution 1 mm/S
- Guaranteed no zero offset or drift
- Level measurement conversion accuracy better than 0.05% of full scale
- Flow measurement accuracy depends on installation and operating conditions. Typically better than 2% in evaluation trials
Mainstream Portable Flowmeter
Perfect for short term and extended field studies with the highest quality performance and competitively priced. This portable option is derived from the Mainstream fixed installation flowmeter and is ideal for short term or extended field studies.
Designed for use in the harshest of field conditions the Mainstream Portable flowmeter is constructed from ultra high impact structural copolymer polypropylene, is fully submersible and highly resistant to chemical attack.
System Unit
- Case body ultra high impact structural copolymer polypropylene
- Highly resistant to chemical attack
- Dimensions 270 mm wide x 250 mm deep x 180 mm high. Weight 5 kg
- Operating temperature range - 10° C to 70° C
Velocity Probe
- Streamlined µPVC moulding
- Dimensions 105 mm long x 50 mm wide x 20 mm high
- Cable exit and pressure sensor mounting at rear
- Reinforced cable- standard length 10 m, maximum length 500 m
Measurement Display
- Large character LCD configurable for most engineering units
- Display sequence is user selectable from date, time, level, flow cross-sectional area, signal quality, flow velocity, flow rate, quantity of flow in last hour and total flow quantity
- LCD legend available in various languages
Switch Outputs
- Two opto-isolated switch outputs, each rated at 60V ac/dc and 250 mA maximum current
- Switches independently programmable to open or close at a user defined level, ultrasound signal quality, velocity or flow rate
- Switches also configurable to generate pulses to indicate a user defined flow quantity
Power Supply
- Built in 12V 7Ah rechargeable battery for up to three months endurance
- External 12V and 24V power inputs for extended endurance
Level Sensor: For more information click here
Local Communications: For more information click here
PC Software: For more information click here
Data Logger: For more information click here
Performance: For more information click here
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