Check the listing for details. TPI SP620C1 Differential Manometer - AUTHORIZED DISTRIBUTOR - WE EXPORT. Condition: New. Listed at 99.97 USD. AUTHORIZED DISTRIBUTOR - WE EXPORT TPI SP620C1 Wireless SP620 dual input pressure, A774 silicone tubing and A620SP pouchFeatures:TPI SP620 With pouch and A774 tubing0.01 inH2O resolutionHigh accuracy +/-0.02 inH2O less than 1 inH20; 1.5% above 1 inH20Temperature compensatedTrim mode to stabilize fluctuating readingsSeven units of measure: mbar, inH2O, kPa, PSI, mmHg, inHg, and mmH2OApplications:Test duct pressure and perform static pressure checksAdjust appliance regulatorsTest pressure switch on a 2-stage gas furnace in both positive and negative pressuresSetting delivery pressuresLeakage "Shut-in" testsRegulator adjustments for pressure and lock-up testsCheck air filters by measuring pressure dropWhat's In The Box:SP620 (Differential Manometer)PouchA774 Tubing