HM670 and HM680 hydronic manometers measure differential and gauge fluid pressure to balance heating and cooling systems or check pump performance. Both models can measure and display differential, high-side, and low-side pressures simultaneously without having to change hose connections or instrument valve settings. The HM680 also performs onboard flow, brake power, specific heat, and impeller diameter calculations. Up to 1,000 data points can be stored to memory for later recall or downloading to a PC. This unit comes with a temperature probe, downloading software, and USB interface cable.

Alnor Products/TSI Inc., 500 Cardigan Rd., Shoreview, MN 55126; 651-490-2811 or 800-424-7427; 651-490-3880 (fax);;

eProduct #189