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 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 options.

Never expose gas sensors to pressure or you may cause damage and/or false readings. Damaged sensors will not provide accurate gas analysis. Inaccurate gas analysis can lead to serious personal injury or death. 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.


  • 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


Ful 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)
Power Requirements 7.4 V Lithium or Optional 110/230 V Electric
Dimensions (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