Hi-tech analyzer for measuring  nitrox and trimix

Divesoft He/O2 Analyzer - bare

No helium sensor to replace - ever!

Hi-tech analyzer for measuring  nitrox and trimix gases.  After inserting the analyzer adapter (included) to a bottle valve with a breathing mixture, the content of both oxygen and helium is shown as percentages directly on the display at the same time.

This trimx analyser reports "FOUL AIR" if the oxygen, nitrogen and helium can not be calculated due to contamination which is a major safety advantage over any other analyser.

  • OLED Display
  • Analyzer has built in Gas Mixing Calculator
  • Continous flow mixture measurement with Hi/Lo alarms for He and O2
  • new electronics with lower power usage
  • Gas purity option serves for gas purity measuring.
    It is primary suited for argon, but after readjustment of the values it is possible to use for several different gases.
    It is also possible to detect ratio of two gases with different speed of sound. For example: helium/nitrogen, helium/argon, hydrogen/nitrogen, hydrogen/argon and many more.


 Download Download Manual..

  Video  Video

Operation Principle

A standard electrochemical sensor (R-17S) normally used in analyzers for diving is used to determine the oxygen content. The helium content is determined on the basis of measuring the speed of sound in the analyzed mixture.

The speed of sound depends on the content of helium and oxygen, and on the temperature of the mixture. The dependence of the speed of sound on pressure is marginal and can be ignored under normal atmospheric pressure. At 0°C the speed of sound is approximately 970 m/s in pure helium, 330 m/s in air, and 315 m/s in pure oxygen. Raising the temperature by one degree raises the speed of sound by approximately 0.175%. The speed of sound in the mixture is described as a non-linear equation of temperature, oxygen content and helium content.

The speed of sound is measured directly as the time it takes for an acoustic impulse to travel between two microphones. This measurement is taken alternately in both directions to eliminate the influence of the gas flow-rate.

Every analyzer produced is tesed in the complete range of acceptable oxygen and helium values. It is tested in air, pure oxygen and pure helium as well as in 12 different calibration mixtures.

- Simple flow limiter for all valves.
Pressure sensor - the analyzer can measure pressure in the tank and gas mixture at the same time
Ohm-meter plugin - to check bulbs and cables 
Voltmeter plug-in - to check batteries (lights, scooters...)
Flow Limiter for Inflator
Worldwide Power Supply (also works with 9V battery - included)
Hard and watertight Case.
professional flow limiter
connection hose

Firmware upgrades

The firmware in the He/O2 analyzer is continuously updated. The updates are user installable and can be downloaded here:
Divesoft He/O2 Analyzer - bare
Regular Price: $850.00
On Sale For: $810.00

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