New Call-to-action

For checking the purity of hydrogen (H2) in H2-cooled generators and synchronous converters, and for monitoring the safe purging of H2 during shutdown or startup. Will also measure oxygen (O2) level inside of generator, including during H2 purity operation. The Nova Model 382 Tri-Gas Analyzer with separate O2 channel is designed for monitoring the H2 purity inside a power generator and to monitor the purging procedure during a generator shutdown or startup. It can also measure oxygen content in a hydrogen atmosphere. The separate O2 sensor and display remain active regardless of which other range is selected.

The analyzer contains a temperature-compensated thermal conductivity (T/C) cell, electrochemical O2 sensor, amplifier board, digital readout, range switch, pressure regulator, gas flow control valve, pump, and a flow indicator. Recorder outputs for active T/C range and O2 channel are included.

The T/C cell does not burn the sample nor is it consumed in any way, so it has a life expectancy of over 10years usually. Electrochemical O2 sensor is also of the long-life style lasting approximately 4-5 years. Measurement results are fast and accurate. A rechargeable 'gel cell' battery provides enough power for about 8 hours of continuous operation and the analyzer can be used while it is being recharged.

Unit of Measure


N/A Thermal-conductivity (T/C) cell for H2; Electrochemical sensor for O2


N/A Range 1: 0-100% H2 in Air; Range 2: 0-100% H2 in CO2; Range 3: 0-100% Air in CO2; Separate Range: 0-25.0 % O2


N/A 0.1% of gas measured


N/A Range 1: ± 1% of Full Scale; Range 2 & 3: ± 2% of F.S.; O2 Range: ± 1% of F.S.


N/A H2 in CO2, Air in CO2, & O2 ± 2% F.S. per week maximum drift; 0-100% H2 in Air range is ± 0.4% per week maximum


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


N/A 0 to 50 ºC32 to 120 ºF


N/A ± 1.0% of F.S. on H2 in Air & O2 range. ± 2% of F.S. in H2 & Air in CO2 ranges


N/A K Style: 9 1/2" L x 7" W x 6 1/2" H @ 12 lbs (24 x 17 x 18 cm @ 3.6 kg) WP Style: 11 1/2" L x 8" W x 7 1/4" H @ 8 lbs (29 x 20 x 18 cm @ 3.6 kg)


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


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


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.


N/A Hydrogen (H2)


N/A Power Industry


    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 with backlight
  • 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
  • Weatherproof (WP) cabinet with clear lexan cover
  • Sample pressure ranges 0.5 PSI to 125 PSI


  • Recorder outputs of 0-1 V or 4-20 mA
  • Suitcase (K) style cabinet available

View Our
Product Catalog
Have a question?
Contact Us
Ready to get started?
Request Quote