Startseite
Oxygen Verification in Trimix & Heliox Diving Gases

Oxygen Verification in Trimix & Heliox Diving Gases

Confirming Oxygen Content in Helium-Based Deep Diving Blends — OMD-21

Trimix and heliox blends, used for deep technical and commercial diving, combine oxygen with helium and sometimes nitrogen to manage narcosis and oxygen toxicity risk at depth. Because these blends are custom-mixed for a specific planned depth, verifying the actual oxygen percentage after blending is critical, since helium’s presence in the mix does not change how oxygen analysis works.

The OMD-21 gives blenders and divers a reliable way to verify oxygen content in trimix and heliox blends, supporting safe gas preparation for deep diving operations.

  • Trimix & Heliox Verification
  • Deep Diving Gas Safety
  • Blending Station Use
  • Portable Handheld Analysis

Why Trimix & Heliox Oxygen Verification Matters

Deep diving blends are calculated to keep oxygen partial pressure within safe limits at planned depth, and an error in the oxygen percentage during blending can create a serious toxicity or hypoxia risk at the depths these gases are used for. Verifying oxygen content immediately after blending, independent of the blending process itself, catches mixing errors before the gas is used.

Where It's Used

  • Trimix blending stations — verifying oxygen content after helium and oxygen are added to air or nitrogen
  • Heliox preparation for deep or saturation diving — confirming oxygen percentage before use
  • Commercial diving gas preparation — supporting documented gas verification procedures
  • Technical diving instructor and student blend verification — teaching proper trimix analysis

Recommended Analyzer

OMD-21 Tragbarer Handheld-Sauerstoffprozent-Analysator, CE

The OMD-21 measures oxygen percentage accurately regardless of the balance gas, making it well suited to verifying trimix and heliox blends alongside standard air and nitrox.

Its portable design and remote sensor make it practical for use directly at the blending station, giving an immediate confirmation reading as soon as a blend is complete.

  • AAA-Batteriebetrieben
  • Konfigurierbare Alarme
  • 0 – 100% Messbereich
  • Fernsensor mit Strömungsabweiser

Wichtige Spezifikationen

  • Range: 0 – 100% O2 — accurate regardless of helium content in the blend
  • Resolution: 0.01% O2 — supports the precise verification deep diving blends require
  • Power: 3-AAA batteries — convenient for use at blending stations without external power
  • Alarms: adjustable high/low audible alarms to flag a blend outside target specification
  • Enclosure: rugged, portable design suited to repeated use at gas blending panels

Häufig gestellte Fragen

Trace oxygen measurement provides a direct indication of oxygen contamination or crossover into the hydrogen stream. Trending the oxygen concentration can help operators identify changes in electrolyser or purification system performance.

A common measurement point is the hydrogen product stream downstream of the electrolyser stack. Additional measurement points may be used before or after drying and purification equipment depending on the process design and monitoring objectives.

Alarm and control limits should be determined based on the electrolyser manufacturer’s specifications, process conditions, applicable standards, and the facility’s safety requirements rather than using a universal oxygen alarm value.

NEED HELP SPECIFYING AN ANALYZER FOR YOUR OPERATION?

Our application engineers can help confirm the right model for your process conditions.

Angebot anfordern →

← Back to Medical Gas & Life Science Applications

All Application Notes →