Series LFDPG-3 Center Back-Entry Pressure Gauges are used in commercial, residential, and institutional HVAC applications It features an ABS polymer case, Kostil Polymer window, 1/8 or 1/4 in. NPT connection, and copper alloy Bourdon tube sensing element. Accuracy is ASME, Type B. Available in various pressure rating scales. Dual scale (PSI and kPa).