Vibrating Wire Load Cells

Centre Hole Load Cell Model IG 2102
These are rugged and compact sensors used to measure loads in tiebacks, rockbolts, struts or tunnel supports. These are designed to meet the demands of the severe and adverse environmental conditions usually associated with construction or mining activities. To monitor tensile load, the load cell assembly has an annular configuration to enable the passage of anchor through it. To monitor compressive load, the load cell is provided with integral solid centre platens mounted on the end faces of the load sensing element. The load cells have three or six vibrating wire sensors to nullify the effect of eccentricity and an average of the readings of all gauges is equal to the applied load.
Base Load Cell
These are use at the base and crown of steel re-inforcements in tunnels and underground structures

Roof Support Load Cells Model IG 2103

These are vibrating wire load cells provided with a swivelling top plate and fixed bottom plate. Number of vibrating wire sensors is generally three. These are used in mines for monitoring load during and after excavation. A beam is provided between the swivel top of the load cell and the roof. The load cell is positioned at the floor along with the convergence meter. Provision of gas discharge tube protects the sensor against surge and lightning.