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The Nova 334 Portable He Analyzer has been designed for the detection of He primarily in air or nitrogen. However it can be used in some other applications with several background gases present. Consult Nova on these applications.

The thermal conductivity (T/C) cell provides a fast and accurate measurement of He. It has an expected life of over 10 years unless contaminated.

In operation, a built in sample pump draws in the gas sample through the probe, filters, flow meter, and on to the T/C cell. The detected He is displayed on an LCD digital meter which has a switchable back light for use in dark areas.

A rechargeable 'gel cell' battery provides enough power for approximately 8 hours of continuous operation and the analyzer can be used while it is being recharged. A red LED tells when to recharge and a green LED verifies that it is receiving recharging power. The recharger is included.
Unit of Measure


Method of Detection

N/A Temperature compensated thermal conductivity (T/C) cell cannot be burned out due to loss of flow or changing gases

Ranges Available

N/A 0-100% He in air or in N2


N/A 0.1% of He

Accuracy & Repeatability

N/A ±2% of full scale


N/A ±1% of full scale per week

Response Time (T-90)

N/A 90% of final reading in 10 seconds

Ambient Temperature Range

N/A 12 to 50 ºC55 to 120 ºF


N/A ±2% of F.S. on He in Air

Size & Weight

N/A 14" L x 6" H x 10 1/2" D @ 8 lbs (35.5 x 15.2 x 26.6 cm @ 3.6 kg)


N/A AC/DC Operation. 115 VAC 60 Hz for recharging (220 VAC 50 Hz available)

Output Options

N/A 4-20 mA or 0-1 VDC


N/A Helium alarm with LED (optional)

Hazardous Area Rating Options

N/A General Purpose, Non-Hazardous


N/A For analysis of Helium (He) in a binary gas mixture in process gases such as He in air, He in Nitrogen (N2), He in Carbon Dioxide (CO2), He in Argon (Ar), He in Oxygen (O2), etc.



  • Rugged design that is easy to operate
  • Fast warm up and response
  • Long life thermal conductivity cell that provides accurate and stable readings
  • Digital meter readout with backlight
  • Modular layout that is easy to maintain
  • Rechargeable 'gel cell' battery operated
  • Built in sample pump
  • Lightweight, compact and easy to use
  • Weatherproof (WP) cabinet with clear lexan cover



  • Recorder outputs of 0-1 V or 4-20 mA
  • Sample pre-cooler for hot samples
  • Suitcase (K) style cabinet available
  • AC power only operation
  • Helium alarms with LED
  • Detachable/portable Data Logger



  • Ambient air for zero
  • 100% He calibration gas for span.

Unique Applications

N/A All Nova analyzers are built using proven technologies and techniques. If this product does not suit your application, please contact Nova. In many cases, we are able to build an analyzer specific to your needs.

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