JM Series Vibrating wire jointmeter
Wire Jointmeter
    Model:JM-S, JM-E
    Country of Origin:Canada
    Use:The JM is a jointmeter used for monitoring displacement between concrete lifts in concrete dams.
  • consult
Details Solution Applications Downloads Order
The JM series of jointmeters (also crackmeters or fissurometers) are used to measure displacement at joints and cracks in structures and rock masses. Typical applications include:
- Monitoring displacement between concrete lifts in concrete dams
- Measuring fault movements in rock
- Determining crack and joint movement in concrete and masonry structures
- Monitoring separation of shotcrete from the rock face of tunnel walls
- Measuring construction joint movement at the contact with rock foundation

- High accuracy and resolution
- Long-term stability and reliability
- Stainless steel transducer
- Removable and reusable jointmeter
- Easy installation and reading
- Rugged design
- Accommodates shear displacements
- Frequency signal easy to process and transmit over long distances

The JM series of jointmeters consist of a vibrating wire displacement transducer inside a telescoping stainless steel housing. Jointmeters are mounted onto or embedded in a structure, such that its active gauge length spans the crack or joint to be monitored.
The JM-S surface jointmeter is attached to the surface of the structure using groutable or bolt-on anchors. It is attached to the anchors with ball joints at the ends of the sensor, which compensate for any anchor misalignment.
The JM-E embedment jointmeter is embedded in concrete structures such that its active gauge length spans the construction joint to be monitored.
The JM-F foundation deformeter is installed in boreholes beneath foundations. The foundation deformeter has extension tubes threaded on its end and is grouted into the borehole below the foundation to be monitored.


Related Recommendations
Total Solution Provider for Advanced Civil Engineering Testing Instruments
  • 400-700-9998
  • Service Time : Monday to Sunday, 9:00-18:00
  • E-mail :
Copyright © 2008~2015 Earth Products China Ltd. all rights reserved. 粤ICP备12064742号 Domestic headquarters address:West Tower 2301, Fortune Plaza, No. 116, sports east road, Tianhe District, Guangzhou
Hong Kong Headquarter Address:12/F, Asia Trade Centre, 79 Lei Muk Road, Kwai Chung, Hong Kong
About Us