|Standard Range||up to 100 mm|
|Least Reading||0.025 mm|
|Borehole Diameter||35, 44, 51, 64 mm|
|Maximum Length||10 m|
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.