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EPC Products Transducer & Data logger Transducers Displacement vibrating wire transducer JM Series Vibrating Wire Jointmeter
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JM Series Vibrating Wire Jointmeter

Model:JM-S/JM-E/JM-T

Use:The JM series of vibrating wire (VW) displacement transducers are used to measure movements at joints and cracks in structures and foundations (concrete, rock, soil)

Standard:

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The JM utilizes a vibrating wire sensor attached to a spring tensioned between two anchors. Any variation of distance between these anchors will change the tension in the wire. The sensor is protected by a sliding stainless steel housing.

 3 models are available: 

The JM-S Crackmeter is attached to the surface of the structure using groutable or bolt-on anchors. Ball joints at each end of the sensor compensate for any anchor misalignment. The JM-S is also available in 3-D configuration for measurement in three orthogonal directions, or with special clamps for installation on a geogrid. 

The JM-E Embedment Jointmeter is embedded in concrete structures such that its active length spans the construction joint to be monitored. This model consists of two sections: the socket and the sensor, which are installed and connected during two successive concrete lifts. 

The JM-T is used in Borehole Extensometers. 

A thermistor is integrated to the JM allowing temperature measurement.

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