Hydraulic Center Hole Load Cell

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Model ELC-31V Overview

ELC-31V is a vibrating wire type center hole load cell used to determine the load in rock bolts, tieback anchors, etc. It is filled with fluid with a vibrating wire pressure sensor attached to it, to convert the load into a frequency output.
A solid load cell for stress measurement in tunnel supports and struts is also available on request.


Range (kN)/ID (mm) 250/35, 500/52, 750/78, 1000/105, 2000/130, 2500/0
Overload 110 % fs
Calibration accuracy ± 1 % fs
Non-linearity ± 2 % fs from 10% to full range
Temperature limit -10° to 50°C
Temperature effect ± 0.06% fs/° C
Thermistor YSI 44005 or equivalent

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Instrument Name

Center hole load cell

Sensor Type

Vibrating wire, hydraulic


Fluid filled with a vibrating wire pressure sensor attached


To measure compressive load, axial forces in struts, load testing in piles




250/52, 500/52, 750/78, 1000/105, 1500/105, 2000/130, 2500/0 kN/mm (ID)

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


Center Hole Load Cell


High Capacity Center Hole Load Cell


Solid Load Cell


High Capacity Solid Load Cell

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