Pro He Alarm Analyzer - Handheld


The Pro He Alarm Analyzer measures helium in mixed gases. This analyzer includes two audible and visual alarms for high and low helium percentages, and an analog output for shutting down your compressor automatically with an optional relay. Compatible with heliox and trimix.


The Pro He Alarm Analyzer measures helium (He) in mixed gases. The unit comes with two user-defined visual and audible alarm set points, one high and low. If the alarm sounds, the analog output can activate an optional relay that shuts down compressors automatically, sounds a remote alarm, or activates an emergency backup system. Does not require calibration. Can be used as a continuous reading analyzer while mixing gas. Price varies according to power option selected.

WARNING: Never expose gas sensors to pressure or you may cause damage and/or false readings. Damaged sensors will not provide accurate gas analysis. Most gas analyzers can be used to analyze a regulated gas sample flow, the contents of a gas cylinder, or the flow from a regulator. The flow rate of gas must equal 1-5 L/min. To produce this flow, a Flow Restrictor and Regulator may be required. A faulty Flow Restrictor can lead to a false analyzer reading. Flow Restrictors should be regularly tested with a Flow Meter. Inaccurate gas analysis can lead to serious personal injury or death.


  • LCD display
  • Auto switch off setting
  • Fast response
  • Made to test breathing gases
  • Easy to operate, reliable and accurate
  • Long life thermal conductivity sensor
  • Display range of 0.0-100%
  • Low battery warning indicator
  • Two (2) custom audible and visual alarms
  • 4-20 mA analog output for external devices
  • Capable of shutting down compressor at set threshold alarm


Full Scale Resolution ±2% over full scale
Display Accuracy ±2%
Humidity Range 0-90% rh, non-condensing
Response Time <10 seconds for 90% of final value
Operating Temperature Range 41-104°F (5-40°C)
Storage Temperature Range 5-122°F (-15 to 50°C)
Expected Sensor Life Up to 10 years under normal circumstances
Power 7.4 V Rechargeable Lithium Battery or 110/230 V Wall Plug-In (International)
(L x W x H)
2.5 x 1.89 x 4.13 in
(6.35 x 4.76 x 10.48 cm)
Weight 13.2 oz (347 g)
Warranty One year