Made in Japan
Manufacturer: Kyowa Electronic Instruments Co., Ltd.
Model: BWL-20MET

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

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