The 740C21PFB4GA General Purpose Gauge Baratron® Capacitance Manometer features a 20 PSIG range with 1% of reading accuracy and a 4-20 mA analog output with a 9-pin D-subminiature connector. It has a 1/4 inch male NPT fitting. All exposed sensor surfaces are made from Inconel® nickel alloys for exceptional resistance to corrosion from a wide variety of aggressive chemicals. The sensor is also fully welded, guaranteeing safety to equipment operators from accidental exposure to dangerous chemicals. This advanced sensor and its electronics are mounted in a rugged stainless steel enclosure that can withstand harsh environments. The 740C product is referenced to atmospheric pressure.