Anchor bolt load cell, also commonly known as centre hole load cells, are extensively used to determine the load in rock bolts, tiebacks, foundation anchors, cables or struts depending on the application. They are also used for compressive load measurement between structural members i.e. tunnel supports or at the junction between a beam and top of a pile strut.
Encardio-rite provides different types of anchor load cells as follows:
Resistive Strain gauge load cells –These are most commonly used. They give very accurate and reliable data.
- Model ELC-30S Center Hole Load Cell
- Model ELC-30S-H High Capacity Center Hole Load Cell
Hydraulic load cells – These are fluid-filled with a vibrating wire pressure sensor attached to it, to convert the load into a frequency output. These are low cost but are the less accurate as they are affected by temperature.
- Model ELC-31V Hydraulic Center Hole Load Cell
Vibrating load cells – These generally use three vibrating wire strain gauges mounted at 120° to each other to minimize the effect of uneven and eccentric loading. If specifically required, six vibrating wire strain gauges are also used. To determine the load, the average of the three (or six) readings are taken.
- Model ELC-32V VW Center Hole Load Cell
Digital load cells – These are advanced load cells with digital output.
- Model ELC-32VS Digital Center Hole Load Cell
Load cell readings can be measured by using any standard digital read-out unit suitable for resistive strain gage type vibrating wire type sensors. The data can also be automatically collected at the desired frequency, stored and transmitted to a remote server by a suitable data logger using multiplexer/bus mux or SDI-12 digital interface.
The digital load cell can be directly connected to our model ESDL-30 compact datalogger for automatic and wireless measurements.