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Ranges 30mm 50mm 100mm
Resolution 0.025% full scale
Accuracy ±0.2% full scale
Temperature range -20 to +80°C
Thermistor type NTC 3k Ω accuracy ±0.5°C resolution1 0.1°C
Excitation method Pluck or sweep
Material 316 grade Stainless Steel
Ingress protection IP68 to 1700kPa
The Rod Extensometer system accurately measures settlement and/or heave between single or multiple anchor points in a borehole and at its reference head.
Relative movement between the end anchor and the reference tube is measured with either a dial depth gauge or a displacement transducer. The displacement transducer is installed in the reference tube and connected to the free end of the rod; the other end of the rod has one of two anchors connected.