Ashcroft 25-1490-A-02L-100IW Industrial Pressure Gauge

Ashcroft 25-1490-A-02L-100IW is a Type 1490 Low Pressure Diaphragm Gauge with a 2-1/2 in dial that reads 0 to 100 inH2O, designed for precise monitoring of very low pressures in gas systems. The wetted materials are beryllium copper, brass, polysulfone, and RTV silicone, chosen for diaphragm integrity and chemical compatibility in continuous low-pressure service. It features a bottom, 1/4 in NPT male process connection located in the lower position (02L), enabling compact direct piping in tight installations. Intended for natural gas and other gases, this gauge is commonly used on regulator outlets, appliance feeds, and service lines where accurate water-column pressure measurements are essential.