Type 2 Sensor Heads for Series 930 Fixed Monitor.Sensors for outdoor air quality monitors.Sensor Heads for the SM70 Fixed Monitor.Sensor Heads for Series 900 Fixed Monitor.Accessories for outdoor air quality monitors.Accessories for indoor air quality monitors.This linear displacement transducer is compatible with WASP and Campbell Scientific dataloggers.For electrical model the accuracy is better than 0.3% of full scale (depending on range).For vibrating wire model the accuracy is better than 0.5% of full scale.Comes with built-in 3K ohm thermistor temperature sensor.Choice of 5 different ranges between 0.25 and 6 inches (10-150mm).Available output options include 4-20mA, voltage or frequency (vibrating wire). When the crack or joint opens or closes, the movements will be converted into electrical or frequency signals that can be read with a readout unit or datalogger. This linear displacement transducer is typically installed by grouting the two anchors in drill holes on either side of the crack or joint. Depending on your application, you may choose between sensors that use electrical or vibrating wire sensing technologies. It is a good crack width & depth meter gauge. The device is essentially a linear displacement transducer with anchors and ball joints. Crack meters and joint meters are used to monitor movement across surface cracks and joints in concrete, rock, soil and other structures.
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