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 |
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