BWL-ET
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.
?? 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
Model |
Rated Capacity(Water Level) |
Cable Length |
BWL-10MET |
10m |
30m |
BWL-20MET |
20m |
40m |
BWL-30MET |
30m |
50m |
Water Level Measurement |
Rated Capacity |
See table below |
Nonlinearity |
Within ??0.15% RO |
Hysteresis |
Within ??0.10% RO |
Repeatability |
0.05% RO or less |
Rated Output |
2 mV/V (4000??m/m) or more |
Temperature Measurement |
Rated Capacity |
-20 to 60??C |
Measurement Error |
??0.5??C (-20 to 60??C) |
(Refer to Small-sized Temperature Transducer BTS-100AT) |
Environmental Characteristics |
Safe Temperature Range |
-20 to 60??C (non-freezing) |
Compensated Temperature Range |
0 to 50??C (non-freezing) |
Temperature Effect on Zero Balance |
Within ??0.01% RO/??C |
Temperature Effect on Output |
Within ??0.01%/??C |
Electrical Characteristics |
Safe Excitation Voltage |
10 V (Current 28.5 mA) |
Recommended Excitation Voltage |
2 to 6 V (Current 5.7 to 17.1 mA) |
Input Resistance |
350???2% at 0??C |
Output Resistance |
450???2% at 0??C |
Cable |
4-conductor (0.5 mm 2 ) capillary-equipped chloroprene |
shielded cable, 11.3 mm diameter, |
bared at the tip (Shield is not connected to the chassis) |
Mechanical Properties |
Safe Overload Rating |
150% |
Weight |
Approx. 400 g |
Other |
Built-in lightning arrester |
Atmospheric pressure compensation type |
* For use under freezing environment or where the transducer is exposed to corrosive liquid or gases, contact a KYOWA sales representative.