Universal industrial pressure gauge 63 mm with bottom connection FM 631, manufactured according to standard EN 837-1 in a stainless steel housing with glycerin filling. The gauge is resistant to shocks, vibrations, humidity, with increased resistance to sudden pressure spikes, intended for simple measurements of low-viscosity liquids, vapors, and gases that do not corrode copper alloys and do not crystallize. The glycerin filling of the gauge helps reduce pointer fluctuations and decreases wear on moving parts of the mechanism during pressure pulsations and vibrations. Additionally, it prevents condensation and the formation of a corrosive atmosphere inside the pressure gauge that could damage internal components. The measurement range should be selected according to the working pressure, so that the constant or slowly changing pressure does not exceed 75% of the range; pulsating pressure does not exceed 60% of the range, and pressure impulses do not exceed the maximum range. Dial diameter: 63 mm. Material: housing – AISI304 steel, window – plexiglass, connection – brass, mechanism – brass and copper alloys, filling – glycerin. Accuracy class: 1.6. Ambient temperature: from -40°C to +65°C. Medium temperature: maximum +60°C. Bottom connection: GZ 1/4″ BSP (G 1/4 B, EN ISO 228-1, B indicates thread tolerance).