FIELD: instrumentation engineering. SUBSTANCE: case of differential volumetric dilatometer houses two closed chambers for sample and standard, each being filled with working fluid and fitted with bellows and meter of translation converter. Each chamber of converter is equipped with its meter of translation converter and is filled with kerosine. Axes of instrumentation bellows are arranged in parallel and meters are rigidly joined via threaded bushings with working ends of bellows. Meters of translation converter are manufactured in the form of block and are enclosed in container. Outer diameters of bellows, bushing and thread pitch are coupled by relation (1-12):(1-2):(0.1-0.5). EFFECT: enhanced functional reliability. 2 cl, 1 dwg
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