FieldPiece SDMN5 Manometer Dual PortMeasure duct pressures to balance air flowResolution down to 0. 01? WC for static pressure measurement 60. 0? WC to 60. 0? WC rangeIncludes two 5 16? adapters for measuring inlet and outlet pressuresThe SDMN5 is a portable, rugged dual port manometer designed especially for HVACR field service technicians. Measures gas pressure, static pressure and pressure differential. The SDMN5 includes a zero adjust button of the face of the meter, a rugged rubber