BAMOBUL - Model 758-02 -Air Bubbling Level Transmitter

FromBAMO Mesures SAS

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BAMOBUL level sensor is wall mounting; housing protection IP 55, including a pressure sensor, an electronic amplifier and an air generator. Pneumatic connections are of quick coupling type for 6 x 4 mm RISLAN tubing. All wirings are with screw connectors, cable glands ensure the water tightness. The air bubbling stem is of stainless steel 316 L, equipped with a sliding fixing device allowing an exact position of “0 flow rate”. Support is a stainless steel plate to mount on the channel.

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BAMOBUL is designed for Venturi channel or Weir plates (documentation 755-01) water level measurements up to 500 mm.
This application requires a highly accurate level measurement as between water height and level the relation is exponential.
The instrument is associating an air generator to a 4-20 mA pressure transmitter extremely accurate. The sensor permanently measures the necessary pressure to create bubbling against the water column.
This pressure difference is directly proportional to the water height (the pressure is equal to hydrostatic pressure of water column).
To limit errors due to the airflow fluctuation, adjustment are easy with integrated valves. Access to the "0 flow rate" calibration and the full measurement scale are permitted to the end-user.
This instrument is well known for its reliability and the accuracy of signal output even whit particles in the fluid or foam over the surface.

Level transmitter

Scales: 0...30 / 0...50 / 0...100 / 0...300 / 0...500 mm WC (others on request)
Please specify the desired scale when ordering
Temperature limits: 0…50°C
Accuracy: ± 1% full scale
Response time: <10 ms

Air generation

Flow rate: Approximately 250 L/h (free outlet)
Maximal pressure: 200 mbar (approximately 2000 mm WC)
Pump body: ABS
Air flow adjustment: From 0 to maximal flow, regulated for a constant flow rate
Power supply: 230V – 50/60 Hz – 8 VA

Transmitter

Adjustment: Level 0 by push button
Default detection: Tube breaking or chocked outlet
1 Volt free change over contact output, switching power 230V / 5A
Output: 4-20mA (power supply included) / max 600 Ohm / limit 23 mA
Presentation: wall mounting, IP55
Dimensions: 257 x 236 x 95 mm