The ELC-30S is a resistive strain gage type load cell. It is used to determine load in rock bolts, tieback anchors etc through a centre hole. It is based on Wheatstone bridge principle and has eight 350 Ohm resistance strain gages, wired to form a 700 Ohm bridge, inside a cylinder of high steel strength. These eight gages are mounted around the circumference at 45 degrees to each other. The load cell is resistive to ingress of water and corrosive environment by sealing hermetically using the electron beam welding technique.

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Instrument Name

Center hole load cell

Sensor Type

Resistive strain gage


8 gages mounted to reduce positioning effect


To measure load in rock bolt anchors, tiebacks




200/40, 500/52, 1000/78, 1000/105, 1500/85, 1500/130, 2000/105, 2000/155 kN/mm (ID); specify

Key Testing / Calibration

Accuracy test, Overload test

Key Feature/Advantage

Hermetically sealed with electron beam welding; great resistance to extraneous forces, long fatigue life, protected against dust, moisture and adverse environmental conditions

Protection (Waterproofing)

IP-68, water resistant up to 10 mwc

Dimension (mm)

Depends on range

Other Load Cell Products


High Capacity Center Hole Load Cell


Hydraulic Center Hole Load Cell


Solid Load Cell


High Capacity Solid Load Cell

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