FIELD: gravimetric measurements. SUBSTANCE: salient feature of invention consists in provision for capability of switching on of gravimetric equipment at any specified depth. Pressure switch has case with cylindrical sockets where pistons are installed coupled to spring-loaded rod. One piston has constant diameter, the other one is manufactured separable with capability of change of diameter. Difference of areas of pistons ensures operation of switch under hydrostatic pressure at specified depth of basin. EFFECT: increased operational reliability and efficiency. 1 dwg
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