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SWJ-IV Convergence Gauge

Convergence gauge is widely used for measuring the tunnel clearance deformation. And the SWJ-IV convergence gauge is the fourth generation product of SWJ series convergence gauges (its first generation product, i.e. the first convergence gauge in China, was developed in 1978), with independent intellectual property rights. It has advantages of ergonomic design (ZL99326243.0), beautiful appearance, light weight and durable material.

The product has the main features as follows:

1. Loading system with large tension: especially suitable for the triangular closed loop measurement of large-span tunnel;

2. Unique rocking handle: it has the dual functions of rapid positioned loading and load self locking;

3. Unique rotatable gauge (ZL99232088.7): the gauge body can rotate ± 90 degrees or ± 180 degrees around the tape axis with no tape torsioning, which is easy for reading data from the side or below;

4. Unique tape (ZL99232089.5): it has high strength and large stiffness and meets the requirements of large-tension loading and small tensile deformation under the trepanning conditions

As a convergence gauge with the self-locked rocking handle, SWI-IV convergence gauge was granted the national invention patent (ZL99115008.2) in March 2004.

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