BRD-AT
Suitable for compressive changes of rock-bed and enables measurement of upheaval.
The BRD-AT series rock-bed compression displacement transducers are designed to measure compressive changes of rock-bed. They detect relative displacement between the ground surface and the anchor fixed to the bottom of a boring. A temperature measuring function enables simultaneous measurement of displacement and temperature. Zero balance adjustment at the time of installation enables measurement of upheaval, and thus they can be used for rock-bed grout management.
?? For displacement detection, the BJ-AT joint transducer which has abundant achievements is used.
Displacement Measurement |
Model |
Rated Capacity |
BRD-5AT |
5mm |
BRD-10AT |
10mm |
BRD-20AT |
20mm |
BRD-50AT |
50mm |
Performace |
Nonlinearity |
Within ??1.5% RO |
Hysteresis |
Within ??1.5% RO |
Rated Output |
1 mV/V (2000??m/m) or more |
Temperature Measurement |
Rated Capacity |
-30 to 70??C |
Measurement Error |
??0.5??C (-30 to 70??C) |
(Refer to Small-sized Temperature Transducer BTS-100AT) |
Environmental Characteristics |
Safe Temperature Range |
-30 to 80??C |
Compensated Temperature Range |
-20 to 70??C |
Temperature Effect on Zero Balance |
Within ??0.05% RO/??C |
Temperature Effect on Output |
Within ??0.05%/??C |
Electrical Characteristics |
Recommended Excitation Voltage |
2 to 10V AC or DC |
Input Resistance |
350?? ??1% at 0??C |
Output Resistance |
450?? ??0.8% at 0??C |
Cable |
4-conductor (0.5 mm2) chloroprene cable, |
11.5 mm diameter by 1 m long, bared at the tip |
Mechanical Properties |
Safe Overload Rating |
120% |
Length of Mounting Frame |
950mm |
Weight |
Approx. 10.5 kg |