The Model A-1 Single Position Rod Extensometer is a very simple, rugged and reliable instrument, easily installed and completely recessed within the borehole for optimum protection. The Model A-1 is a natural first choice for monitoring the safety in and around tunnels and mine openings.
Options are also available with electrical transducers for remote readout and/or continuous monitoring.
Specifications
| Standard Ranges | up to 100 mm |
| Least Reading | 0.025 mm |
| Borehole Diameter | 35, 44, 51, 64 mm |
| Maximum Length | 10 m |
