HM 650 Hydronic Manometer
The HM 650 measures fluid pressure, either differential or gage. It can be used to balance heating and cooling systems or check pump performance. The Alnor HM 650 is a digital manometer with better resolution than an analog gage and an ability to store and download readings. It is priced lower than most electronic hydronic manometers.

The HM 650 is compatible with both air and water and is highly accurate. It stores 999 data points for later recall, can be setup for continuous datalogging or downloading to a PC or printer. The kit includes two hoses with shut-off valves and six fittings.
 

HM 650 Hydronic Manometer
Part # 632-650-001
Part # 632-650-005 accessory kit
range 0 - 300 psi
resolution 0.05 psi from 0 - 99.95 psi
0.1 psi from 100 - 300 psi
accuracy ± (2% of reading + 2x the resolution)
operating temperature 32 to 194°F (0 - 90°C)
display 4 digit LCD with backlight
dimensions 3" x  4" x 12.5"
weight 3 lbs with batteries installed
power source 4  C - size batteries
battery life minimum 50 hours continuous use
accessory kit (34 pieces) includes 1/4" flare adapters, male 
and female NPT fittings from 1/8" - 3/4"