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OTT CBS bubble water level gauge

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OTT CBS bubble water level gauge

Technical characteristics: Differential pressure measurement, automatic pressure relief, no drift, professional air chamber-not affected by water waves-to prevent air pipe blockage-to extend the life of the air pump intelligent air pump, no maintenance, automatic adjustment of power consumption The life of the air pump is longer than the traditional bubble water level gauge 5 times no need for gas cylinder, no desiccant, specially designed hardware switch, used for installation and debugging of lightning protection, no electronic components under water with SDI12 interface, 4-20mA analog output, even in salt water or contaminated water, the reading is accurate And stable can use different sizes of trachea trachea length
cbs
产品描述
Technical indicators

Technical characteristics

Differential pressure measurement, automatic pressure relief, no drift
Comes with professional air chamber
-Not affected by water waves
-Prevent clogging of trachea
-Extend the life of the air pump
Intelligent air pump, no maintenance, automatic power consumption adjustment
The service life of the air pump is 5 times longer than the traditional bubble water level gauge
No gas cylinder required
No desiccant required
Specially designed hardware switch for installation and commissioning
Lightning protection, no electronic components under water
Comes with SDI 12 interface, 4-20 mA analog output
Even in salt water or contaminated water, the readings are accurate and stable
Different sizes of trachea can be used
Trachea length up to 150 meters

 

Measuring principle

The piston pump inside the instrument generates compressed air, flows through a special airflow line, and enters the air chamber at a set interval. In the air chamber, bubbles bubble up evenly into the groundwater.
The relationship between the groundwater level (h) on the bubble chamber hole and the hydrostatic pressure (P) in the measuring tube is as follows:

Then, assuming that the density of the liquid remains unchanged, there is a certain linear relationship between the measurement liquid level and the air pressure in the measurement tube. By measuring the air pressure in the measuring tube, the current water level can be converted. This is the basic principle of the bubble water level gauge to measure the liquid level.

The professionally designed air chamber can keep the air pressure in the tube stable, eliminate small changes in air pressure caused by fluctuations in the water surface, and prevent the air tube from entering or blocking.

The energy pump can measure the air pressure in the tube before each measurement. Only when the air pressure changes greatly, the air is pumped to reduce the loss of the air pump and extend the service life of the air pump.


Application range

Various water level measuring stations
Rivers, lakes, reservoirs, groundwater, wetlands, dams / bridges / dam entrances, sluices, etc.
Rock foundation, tidal well which may freeze or block
Short-term measurement
When the water level does not change more than 15/30 meters.
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Technical index
Range 0 – 15 m / 0 – 30 m (optional)
Accuracy
Standard: ± 5 mm
Optional: ± 1.5 mm (USGS standard) within the first 3 m of the 15 m range
Resolution 1 mm / 0.1 mBar
unit m、cm、feet、mBar、psi
Measurement interval 1 min - 24 h
Output SDI12、4…20 mA (0.1%, 15 Bit)
powered by 10 -30 V DC, usually 12 V / 24 V
Power consumption
1 minute measurement interval: 320 mAh / day
Measurement interval 15 minutes: 25 mAh / day
Tube diameter Ø 2 mm、Ø 1/8’’、Ø 4 mm
communication SDI-12，4-10mA
Operating temperature -20…60°C
storage temperature -40...85°C
Relative humidity 10-95%
size 165 mm x 205 mm x 115 mm
weight 1500 g
Shell material CBS engineering plastics
Protection level IP43
EMC standards IEC61326、EN61326

 

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