Sigra manufacture and sell a number of sensors for measurement on surface or in the ground. The prime surface sensors are for flow and pressure measurement. The sensors supplied for in-ground use measure pressure, stress change, inclination and movement. They are suitable for use in surface or underground applications.
Sigra supplies a range of pressure transducers principally, but not exclusively, for use in borehole applications. These may measure absolute pressure or gauge pressure with respect to a vent line.
Sigra manufactures flow meters for both gas and liquid flow applications.
Stress Change Cells
Sigra can manufacture to special order, stress change cells that are devices grouted into a rock mass to measure stress change within it.
Sigra manufactures several devices that may be used to monitor the displacement of rocks on joints.