TSI-071213-body.jpgTSI Inc. has introduced an expanded capability line of Hydronic Manometers. Models HM675 and HM685 can be used for balancing commercial hydronic heating and cooling systems, checking pump performance, and setting balancing valves. Both models feature inputs for two temperature probes to maximize efficiency. Model HM685 performs onboard universal flow and btu/hr calculations and allows for four times more storage capacity for increased recall and downloading capability. The recently updated meters replace the previous TSI-Alnor Models HM670 and HM680. They have maintained the same splash-proof design as well as their ability to simultaneously measure and display differential, high-side and low-side pressure without having to change the hose connections or instrument valve settings. Likewise, the backlit display accommodates use in low-light areas while four alkaline or NiMH rechargeable batteries supply long-life power.