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Item # Model 380K, Portable Tri Gas Analyzer for Hydrogen Purging, Suitcase (K) Enclosure

The Nova 380 Series Tri-Gas Analyzer is designed for monitoring H2 purity inside a power generator and to monitor the purging procedure during a generator shut down or start up.

The analyzer contains a temperature compensated thermal conductivity (T/C) cell, amplifier board, digital readout, range switch, pressure regulator, gas flow control valve, pump and a flow indictor. A 4-20mA recorder output follows the active reading.

The T/C cell does not burn the sample nor is it consumed in any way, so it has a life expectancy of over 10 years. Measurement results are fast and accurate. A rechargeable battery provides power for about 8 hours of operation, and the analyzer can be used while it is being recharged.

Specifications  · Applications  · Features  · Options  · Calibration  · Unique Applications


Method of Detection

Temperature compensated thermal conductivity (T/C) cell

Ranges Available

Range 1 : 0-100% H2 in Air
Range 2 : 0-100% H2 in CO2

Range 3 : 0-100% Air in CO2


0.1% of gas measured

Accuracy & Repeatability

Range 1: ± 1% of Full Scale; Range 2: ± 2% of F.S.; Range 3: ± 2% of F.S.


H2 in Air range is ± 0.4% per week
H2 in CO2 or Air in CO2 2% F.S. per week maximum drift

Response Time (T-90)

10-15 seconds to 90% step change - not including sample transport time

Ambient Temperature Range

0 to 50 ºC
32 to 120


±1.0% of F.S. on H2 in Air range. ±2% of F.S. in H2 or Air in CO2 ranges

Size & Weight

9 1/2" L x 7" W x 6 1/2" H @ 12 lbs (24 x 17 x 18 cm @ 3.6 kg)


Battery operation. 115 VAC, 60 Hz for recharging (220 VAC, 50 Hz available)

Output Options


Hazardous Area Rating Options

General Purpose, Non-Hazardous

      For checking purity of hydrogen (H2) in H2-cooled generators and synchronous converters. The Model 380 Series will also monitor the safe purging of H2 during shut down.

  • Rugged design that is easy to operate
  • Fast warm up and response
  • Monitors 0-100% H2 in air, 0-100% H2 in CO2, 0-100% Air in CO2
  • Rugged long life thermal conductivity cell
  • Digital readout meter
  • Rechargeable battery operation
  • Modular layout that is easy to maintain
  • Built in flow meter, flow control valve and pump
  • Built in pressure regulator prevents over pressuring of pump and sensor
  • Suitcase style cabinet (K) is weatherproof when closed
  • Sample pressure ranges 0.5 PSI to 125 PSI

  • Recorder output - 4-20mA
  • Suitcase (K) style cabinet available

  • Range 1 : Air for Zero, 100% H2 for Span
  • Range 2 : 100% CO2 for Zero, 100% H2 for Span
  • Range 3 : 100% CO2 for Zero, Air for Span.

Unique Applications
    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.


·  Portable Tri-Gas Analyzer for Hydrogen Purging - 380 Series - 2

·  Application power


380K Brochure
(PDF, 1051KB)