• Alnor Hydronic Manometer HM685

Alnor Hydronic Manometer HM685

$4,400.00 $3,960.00
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Shipping Weight:
11.00 LBS

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The TSI Alnor® Hydronic Manometer HM685 is used to check pump performance in addition to balancing hydronic heating and cooling systems. Without having to change hose connections or instrument valve settings the HM685 model can measure and display differential, high side, and low side pressures simultaneously.

Included Items
  • Instrument
  • Hard carrying case
  • (2) 6.7 ft x ¼-in. (2 m x 6 mm) hoses with shut-off valves
  • (2) B&G readout probes
  • (2) P/T gauge adapter probes
  • Power Cord
  • Temperature probe
  • CompuDat™ USB downloading software
  • USB interface cable

Product Specifications


Differential Range:±300 psi (±2,068 kPa)
Gauge Range:-20 to 300 psi (-138 to 2,068 kPa)
Resolution (best):0.001 psi (0.01 kPa)
Accuracy:±1% of reading or .072 psi (0.5 kPa)
Units:psi, in. H2O, ft H2O, kPa, mm Hg, in. Hg, mm H2O, bar
Pressure Connection:¼" 37° flare fitting, Male
Operating (electronics):40 to 113°F (5 to 45°C)
Storage:-4 to 140°F (-20 to 60°C)
Liquid Media:32 to 180°F (0 to 82°C)
Probe:-40 to 250 °F (-40 to 121 °C)
Resolution:0.1°F (0.1°C)
Accuracy:±0.5°F (0.3°C) from 32 to 160°F (0 to 71°C); max ±2.0°F (1.2°C) from -40 to 32°F (-40 to 0°C) and from 160 to 250°F (71 to 121°C)
Units:°F, °C