Nevco Engineers Pvt. Ltd.

Hydrogen Purity Analyzers

Portable analysers

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 recorder output is optional.
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 'gel cell' battery provides enough power for about 8 hours of continuous operation and the analyzer can be used while it is being recharged.

Applications

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 or startup.

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

  • 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
Specifications 380WP 380K 381K 382K
Method of Detection Temperature compensated thermal conductivity (T/C) cell Temperature compensated thermal conductivity (T/C) cell Thermal conductivity (T/C) cell, electrochemical O2 sensor Thermal-conductivity (T/C) cell for H2; Electrochemical sensor for O2
Ranges Available Range 1 : 0-100% H2 in Air
Range 2 : 0-100% H2 in CO2
Range 3 : 0-100% Air in CO2
Range 1 : 0-100% H2 in Air
Range 2 : 0-100% H2 in CO2
Range 3 : 0-100% Air in CO2
Range 1 : 0-100% H2 in Air
Range 2 : 0-100% N2 in CO2
Range 3 : 0-100% Air in N2
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
Resolution 0.1% of gas measured 0.1% of gas measured 0.1% of gas measured 0.1% of gas measured
Accuracy & Repeatability ±1% F.S except in 85-100% H2 in Air range, which is within 0.5% absolute H2 ±1% F.S except in 85-100% H2 in Air range, which is within 0.5% absolute H2 ±1% F.S except in 85-100% H2 in Air range, which is within 0.5% absolute H2 ± 1% of Full Scale; Range 2 & 3: ± 2% of F.S.; O2 Range: ± 1% of F.S
Drift 0-100% H2 in Air range is ± 0.4% per week maximum
H2 in CO2 or Air in CO2 2% F.S. per week maximum drift
0-100% H2 in Air range is ± 0.4% per week maximum
H2 in CO2 or Air in CO2 2% F.S. per week maximum drift
H2 in N2 or Air in N2, ± 2% F.S. per week maximum drift
0-100% H2 in Air range is ± 0.4% per week maximum
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
Response Time (T-90) 10-15 seconds to 90% step change - not including sample transport time 10-15 seconds to 90% step change - not including sample transport time 10-15 seconds to 90% step change - not including sample transport time 10-15 seconds to 90% step change - not including sample transport time
Ambient Temperature Range 0 to 50 ºC
32 to 120 ºF
0 to 50 ºC
32 to 120 ºF
0 to 50 ºC
32 to 120 ºF
0 to 50 ºC
32 to 120 ºF
Linearity ±1.0% of F.S. on H2 in Air range
±2% of F.S. in H2 in CO2 or Air in CO2 ranges
±1.0% of F.S. on H2 in Air range
±2% of F.S. in H2 in CO2 or Air in CO2 ranges
± 1.0% of F.S. on H2 in Air range. ± 2% of F.S. in H2 or Air in N2 ranges ± 1.0% of F.S. on H2 in Air & O2 range. ± 2% of F.S. in H2 & 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) 11 1/2" L x 8" W x 7 1/4" H @ 8 lbs (29 x 20 x 18 cm @ 3.6 kg) 9 1/2" L x 7" W x 6 1/2" H @ 12 lbs (24 x 17 x 18 cm @ 3.6 kg) 9 1/2" L x 7" W x 6 1/2" H @ 12 lbs (24 x 17 x 18 cm @ 3.6 kg)
Power AC/DC Operation. 115 VAC, 60 Hz for recharging (220 VAC, 50 Hz available) AC/DC Operation. 115 VAC, 60 Hz for recharging (220 VAC, 50 Hz available) AC/DC Operation. 115 VAC, 60 Hz for recharging (220 VAC, 50 Hz available) AC/DC Operation. 115 VAC, 60 Hz for recharging (220 VAC, 50 Hz available)
Output Options 4-20 mA or 0-1 VDC 4-20 mA or 0-1 VDC 4-20 mA or 0-1 VDC 4-20 mA or 0-1 VDC
Hazardous Area Rating Options General Purpose, Non-Hazardous General Purpose, Non-Hazardous General Purpose, Non-Hazardous General Purpose, Non-Hazardous
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