BWL-ET
Water Level Transducer

Summary

Suitable for measure changing underground water levels in landslide areas.
The BWL-ET series is strain gage type water level transducers designed to measure changing underground water levels in landslide areas, etc. They do not require any compensation against fluctuations in atmospheric pressure, and thus ensure accurate measurement. A temperature measuring function lets them perform simultaneous measurement of water level and temperature.

Features

●Stainless steel enclosure ensures excellent corrosion resistance, while a built-in lightning arrester assures safe operation without receiving any effect of thunderbolts.
●Simultaneous measurement of water level and water temperature
●Easy installation, maintenance and inspection
●Applicable for measurement of underground water levels in landslide areas and water levels of dams, rivers, intake wells and tanks

Products table

All display

BWL-10MET
water level 10 m

Specifications

Performance
Water Lever Measurement
Rated Capacity Water level: 10 m
Nonlinearity Within ±0.15% RO
Hysteresis Within ±0.10% RO
Repeatability 0.05% RO or less
Rated Output 2 mV/V or more
Temperature Measurement
Rated Capacity -20 to 60ºC
Measurement Error ±0.5ºC (-20 to 60ºC)
Environmental Characteristics
Safe Temperature -20 to 60ºC (Non-freezing)
Compensated Temperature 0 to 50ºC (Non-freezing)
Temperature Effect on Zero Within ±0.01% RO/ºC
Temperature Effect on Output Within ±0.01%/ºC
Electrical Characteristics
Safe Excitation 10 V (Current: 28.5 mA)
Recommended Excitation 2 to 6 V (Current 5.7 to 17.1 mA)
Input Resistance 350 Ω ±2% at 0ºC
Output Resistance 450 Ω ±2% at 0ºC
Insulation Resistance 1000 MΩ or more (With 50 VDC applied)
Cable 4-conductor (0.5 mm2) capillary-equipped chloroprene shield cable, 11.3 mm diameter by 30 m long, bared at the tip
(Shield wire is not connected to the case.)
Mechanical Properties
Safe Overloads 150%
Weight Approx. 400 g
Other Built-in lightning arrester
Atmospheric pressure compensation type

Dimensions

BWL-ET

BWL-20MET
water level 20 m

Specifications

Performance
Water Lever Measurement
Rated Capacity Water level: 20 m
Nonlinearity Within ±0.15% RO
Hysteresis Within ±0.10% RO
Repeatability 0.05% RO or less
Rated Output 2 mV/V or more
Temperature Measurement
Rated Capacity -20 to 60ºC
Measurement Error ±0.5ºC (-20 to 60ºC)
Environmental Characteristics
Safe Temperature -20 to 60ºC (Non-freezing)
Compensated Temperature 0 to 50ºC (Non-freezing)
Temperature Effect on Zero Within ±0.01% RO/ºC
Temperature Effect on Output Within ±0.01%/ºC
Electrical Characteristics
Safe Excitation 10 V (Current: 28.5 mA)
Recommended Excitation 2 to 6 V (Current 5.7 to 17.1 mA)
Input Resistance 350 Ω ±2% at 0ºC
Output Resistance 450 Ω ±2% at 0ºC
Insulation Resistance 1000 MΩ or more (With 50 VDC applied)
Cable 4-conductor (0.5 mm2) capillary-equipped chloroprene shield cable, 11.3 mm diameter by 40 m long, bared at the tip
(Shield wire is not connected to the case.)
Mechanical Properties
Safe Overloads 150%
Weight Approx. 400 g
Other Built-in lightning arrester
Atmospheric pressure compensation type

Dimensions

BWL-ET

BWL-30MET
water level 30 m

Specifications

Performance
Water Lever Measurement
Rated Capacity Water level: 30 m
Nonlinearity Within ±0.15% RO
Hysteresis Within ±0.10% RO
Repeatability 0.05% RO or less
Rated Output 2 mV/V or more
Temperature Measurement
Rated Capacity -20 to 60ºC
Measurement Error ±0.5ºC (-20 to 60ºC)
Environmental Characteristics
Safe Temperature -20 to 60ºC (Non-freezing)
Compensated Temperature 0 to 50ºC (Non-freezing)
Temperature Effect on Zero Within ±0.01% RO/ºC
Temperature Effect on Output Within ±0.01%/ºC
Electrical Characteristics
Safe Excitation 10 V (Current: 28.5 mA)
Recommended Excitation 2 to 6 V (Current 5.7 to 17.1 mA)
Input Resistance 350 Ω ±2% at 0ºC
Output Resistance 450 Ω ±2% at 0ºC
Insulation Resistance 1000 MΩ or more (With 50 VDC applied)
Cable 4-conductor (0.5 mm2) capillary-equipped chloroprene shield cable, 11.3 mm diameter by 50 m long, bared at the tip
(Shield wire is not connected to the case.)
Mechanical Properties
Safe Overloads 150%
Weight Approx. 400 g
Other Built-in lightning arrester
Atmospheric pressure compensation type

Dimensions

BWL-ET

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Remarks

※Contact us when freezing may occur. Contact us for use under corrosive liquid or gaseous environment.

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