Borehole Extensometer is used to monitor displacement or deformation in soil, rock and concrete structure at various depths using rods of different material and lengths with reference to the instrument head.
The Mechanical Borehole Extensometer of PMT is designed to be installed in 2-3 points suitable for a 76 mm borehole and 4-6 points suitable for a 100 mm borehole. Movement of rods attached to the anchors is measured manually with caliper/micrometer depth gauge with a resolution of 0.01mm relative to the head of the extensometer anchored at the mouth of the borehole to reveal the magnitude of the deformation between the anchors.
Introduction:
Features:
- - Rugged and robust construction
- - Easy installation
- - Variable anchor lengths
- - Reliability, accuracy and simplicity in readings
- - Simple operation
- - Adaptable to data loggers and/or data acquisition systems
Specifications:
| Sensor type | Mechanical |
|---|---|
| Sensor range | 25, 50, 100mm |
| Resolution | 0.01mm |
| Accuracy | ±0.1% F.S |
| Temperature Range | -20 to 80C |