FIELD: instrumentation, visual pressure indicators, manometers, check of pressure value in space of fire extinguishers. SUBSTANCE: given pressure indicator has body with stepped hole. Flattened end of manometric tube functioning as filter through which pressure is supplied and coming in the form of single- or multirow spiral put in hole of larger diameter in body passes through hole of smaller diameter and is fixed. This makes it possible to limit deviation of manometric tube under pressure overload caused by shock or vibration. Second free soldered end of tube has shape of pointer used to read indications on scale located on inner side of glass anchored in body. EFFECT: possibility to simplify design and increased accuracy of pressure indicator. 2 cl, 4 dwg
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