Crackmeters and Jointmeters 1 Crackmeters and Jointmeters 2 Crackmeters and Jointmeters 3 Crackmeters and Jointmeters 4 Crackmeters and Jointmeters 5 Crackmeters and Jointmeters 6
Crackmeters and Jointmeters 1 Crackmeters and Jointmeters 2 Crackmeters and Jointmeters 3 Crackmeters and Jointmeters 4 Crackmeters and Jointmeters 5 Crackmeters and Jointmeters 6

Crackmeters and Jointmeters

The crackmeters and jointmeters are intended to monitor movements across surface joints or cracks, mainly in concrete structures or rocks. Crackmeter consists of a vibrating wire or potentiometer displacement transducer housed in a stainless steel telescopic body with two anchoring points. These anchors have self-lubrificating ball joints allowing lateral movements up to ±10° in the orthogonal planes (Y - Z axis) not influencing the operation of the jointmeter.
Infrastructure | Geotechnical Instrumentation | SISGEO
Measurement principle vibrating wire with built-in thermistor Linear potentiometer
Range 10, 25, 50, 100, 150mm 25, 50, 100, 150, 200mm
Accuracy Pol. MPE < ±0.50% FS (10mm)
< ±0.50% FS (25mm)
< ±0.30% FS (50mm)
< ±0.30% FS (100mm)
< ±0.30% FS (150mm)		 < ±0.30% FS (25mm)
< ±0.30% FS (50mm)
< ±0.30% FS (100mm)
< ±0.15% FS (150mm)
< ±0.15% FS (200mm)
Output signal frequency (displacement), Ohm (thermistor) 4-20 mA current loop (displacement)
Display Resolution 0.02% FS (with Sisgeo readout) 0.01% FS (with Sisgeo readout)
Typical frequency range 1500 - 2800 Hz  
Power supply   12 - 24 V DC
Operating temperature - 20°C +80°C - 20°C +80°C
Protection IP68 up to 100 kPa (tested in a static condition, upper value on request) IP68 up to 100 kPa (tested in a static condition, upper value on request)