Digital Hydronic Manometer, Includes (2) 6.7 ft x 1/4 in Hoses with Shut-Off Valves, (2) B&G Readout Probes, (2) P/T Gauge Adapter Probes, Hard Carrying Case, Power Cord, Temperature Probe, USB Interface Cable, Maximum Gauge Pressure 300 psi, Measuring Units bar, ft wc, in wc, in Hg, kPa, m wc, mm Hg, psi, Minimum Gauge Pressure 300 psi, Pressure Accuracy +/-0.5 Percent of Full Scale, Pressure Resolution 0.001 psi, Number of Records Stored 4,000, Maximum Differential Pressure Measured 300 psi This hydronic manometer is used to balance hydronic heating and cooling systems, check pump performance, and set balancing valves. It can measure and display differential, and high-side and low-side pressures simultaneously, without needing to change hose connections or instrument valve settings.