The Remote Convergence Meter is used for measuring the convergence between roof and floor of underground mines or cavity. Monitoring of the roof to floor convergence of these openings, particularly when driven through rocks showing a time-dependent behavior, provides essential information to assess the overall ground stability.

Remote Convergence Meter of PMT consists of either VW displacement sensor or Linear Potentiometer type displacement sensor with two telescopic tubes maintained together by a friction ring which prevents the system from collapsing under its own weight. Both the tubes have anchoring flange at one end for fixing it with roof and floor where as free end moves in each other in perfect alignment. Remote type system is generally used where access is not easy.