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-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-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
