LOAD CELL
A. 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. 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.
To monitor compressive load in struts, the load cell is provided with solid centre plates mounted on the end faces of the load sensing element.
B. Strut Load Cell 200/ 250 ton , Height 180 mm x Diameter 150mm
C. 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.
SPECIFICATIONS :
| Standard Ranges | 10, 20, 30,50, 100, 150, 200, 250 tf. |
|---|---|
| Non-linearity | 0.5%fs |
| Accuracy | Better than 0.5% fs |
| Material (Sensing element) | Stainless steel |
| Operating Temperature | -10 to 80°C |
| Coil Resistance | 140 – 160 Ohm @ 25°C |
| Thermistor | YSI 44005 or equivalent (3k Ohm @ 25°C) |
| Surge Arrestor | Citel 90V Gas Discharge tube |
| Cable | 3m , 6 core shielded, PVC insulated cable. |
TYPICAL APPLICATION :
- The measurement and control of loading in foundation anchors and rock bolts.
- Tension in cable anchors and struts.
- Compressive load on struts.
- Load between structural beam and top of piles.
- Load between tunnel lining segments.
- Proof loading and pullout tests on trial anchors.
- Correlation of data obtained from bore hole extensometer