Applications: Particularly used to measure pressure which stays inside of the fire extinguisher container and oxygen or nitrogen steel container Description: The gauges have stainless steel cases and high impact-resistant polycarbonate lens Dial faces can be made per customer design The spiral tube technology used in these gauges offers the necessary accuracy without the complication of gearing, linkages, and bearings that are present in a conventional movement gauge Every gauge must be tested by overpressure, water resistance, leak test, and visual inspection Specifications: Diameter: 30, 36, and 40mm Case: 304 stainless steel Protection grade: IP65 Lens: polycarbonate Measuring principle: spiral tube/brass Connection: male thread 1/8 inches NPT standard, and brass back connection only Other connections available by customization Temperature limits: -20 to +60 degC Ranges: 0/160 to 0/4,000psi