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Liquid flow rate measurement - metering low and variable wastewater volumes
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SUBJECT OF THE OFFER: The subject of the offer is the metering instruments for low volumes of wastewater in gravity flow conditions. Depending on sewage system type:
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metering wastewater in circular channels - Palmer - Bowlus ZPB 100 or ZPB 160 flume with FLOWBOX Flow Meter,
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metering wastewater in rectangular channels - Parshall P1 or P2 flume with FLOWBOX Flow Meter, |
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ASSUMPTIONS
The liquid flow rate measurement with flume and water rise method in circular or rectangular channels is based on the actual liquid level measured by the ultrasonic sensor (radar sensor, optional) at the hydraulic structure converted into the value of flow ratio by the measuring transducer.
Palmer-Bowlus FLUME MEASURING RANGE
ZPB 100 - 0,2m3/h to 12m3/h.
ZPB 160 - 0,5m3/h to 50m3/h.
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See additional information:
-> ultrasonic flow meter + Palmer-Bowlus ZPB flume (circular flumes)
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Parshall FLUME MEASURING RANGE
P1 - measuring range 1 to 20 m3/h
P2 - measuring range 2 to 48 m3/h
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See additional information:
-> ultrasonic flow meter + Parshall flume (rectangular flumes)
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FLOWBOX FLOW METER
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The FLOWBOX Flow meter is intended for measurement of liquid level and volume in vessels and flow rate measurement in open
channels. The ultrasonic method eliminates sensor contact with aggressive
(acids, bases) or contaminated (wastewater) medium. The measuring set includes M1600 Microprocessor
Transducer, ultrasonic level sensor and connecting cable.
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METHOD OF OPERATION
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The flow meter measures ultrasonic beam passage time between the sensor and the surface of measured
liquid. The distance to medium surface is measured. The value can be used to read the liquid level or with a formula for over 20 flumes and weirs to determine the liquid flow rate.
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FLOWBOX FLOW METER FEATURES
-> Level / volume measurement
- determined for various vessel shapes
- or with a 32-point characteristic curve
-> Flow measurement in open channels with:
- Palmer-Bowlus flume
- Venturi flume
- Parshall flume
- measuring weirs
- general flow equation
-> Code protected flow meter access (optional).
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SPECIFICATION OF MEASURING TRANSDUCERS
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-> Readout: instantaneous flow rate, total flow rate
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-> Current outputs:
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- 0-20mA
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- 4-20mA for instantaneous flow rate
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-> Impulse output - adder (optional)
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-> Accuracy: ± 0.1% of range
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-> Supply: ~230 V, 50 Hz or battery supply
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-> Power input <10 VA
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-> Ambient temperature: -10 °C to +55 °C
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-> Housing protection rating: IP65
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-> Housing material: ABS
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-> Weight: ~1.5 kg
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SPECIFICATION OF ULTRASONIC SENSORS
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-> Narrow ultrasonic beam
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-> Measuring range: 0-1.8 m
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-> Accuracy: ± 0.25% of measuring range
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-> Ambient temperature: -30 °C to +60 °C
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-> Automatic temperature compensation
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-> Sensor material: PVC
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-> Protection rating: IP65 (IP67 on request)
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