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Kingmach Crack Meter for Dams, Bridges, and Tunnels
A tiny crack in a dam or bridge is rarely just a surface blemish. It can signal shifts in load, temperature, or structural integrity that demand attention. Geotechnical and civil engineers depend on crack meters to turn that hairline fracture into quantifiable data – tracking its width, movement, and rate of change over time. Kingmach Measurement & Monitoring Technology Co., Ltd. builds professional-grade crack meters that fit into this workflow without fuss. Our instruments cover everything from vibrating wire to displacement sensor types, so you can match the tool to the concrete, rock, or soil at hand. The focus is on reliable, repeatable measurements that teams can act on, whether they're monitoring a tunnel lining, a retaining wall, or a historic masonry façade. Because every site is different, Kingmach also tailors crack meters to specific project requirements – adjusting cable lengths, mounting brackets, or output signals. With a global distribution network and technical support that doesn't quit after the sale, Kingmach ensures your monitoring project runs smoothly from installation to long-term data collection.
Technical Detail
Kingmach crack meters deliver precision monitoring for cracks and joints in concrete, rock, and soil structures. Available in vibrating wire and displacement sensor models, they offer high accuracy, long-term stability, and easy integration with data loggers. Key features include robust stainless steel construction, IP67 protection, and wide measurement ranges. Advantages include rapid installation, minimal maintenance, and compatibility with Kingmach's full monitoring ecosystem. Customization options cover cable lengths, mounting accessories, and output signals to suit unique site conditions. Typical applications span dam safety, bridge health monitoring, tunnel convergence, slope stability, and heritage building conservation. Backed by Kingmach's global network and responsive technical support, these sensors help engineers make informed, timely decisions.
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Products

Smart General-Purpose Displacement MeterJMDL-21XXAT
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Magnetostrictive Displacement Meter JMCW-21XXADT
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Smart Flexible Displacement Meter JMDL-24XXAT
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A crack meter measures the opening, closing, and rate of movement across cracks and joints in structures like dams, bridges, tunnels, and buildings. It provides early warning of structural issues.
It uses a tensioned wire whose frequency changes with crack displacement. The frequency signal is immune to electrical noise, making it ideal for long-distance, long-term monitoring.
Yes. Kingmach offers custom cable lengths, bracket configurations, and output options to meet specific project requirements.
Standard ranges span from 12.5 mm to 100 mm with accuracy of ±0.1% full scale, depending on the model. Custom ranges are available on request.
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