The HM670 and HM680 Alnor hydronic manometers are used to balance hydronic heating and cooling systems and to check pump performance. They can measure and display differential, high side, and low side pressures simultaneously without the need to change hose connections or instrument valve settings.

HM670 Features and Benefits

• Large backlit display for use in low light areas
• Operates on four alkaline or NiMH rechargeable batteries
• Reads in. H2O, ft. H2O, psi, in. Hg, mm H2O, kPa, mm Hg, bar

HM680 Features and Benefits

• Large backlit display for use in low light areas
• Operates on four alkaline or NiMH rechargeable batteries
• Reads in. H2O, ft. H2O, psi, in. Hg, mm H2O, kPa, mm Hg, bar
• Performs on–board universal flow and btu/hr calculations
• Displays volumetric flow when a Cv (Kv) factor is programmed
• Allows up to 100 Cv (Kv) factors to be entered
• Calculates brake power, heat flow, Cv (Kv) factors and impeller sizing
• Stores up to 1,000 data points for recall or downloading via USB interface