Nevco Engineers Pvt. Ltd.

Hydrogen Purity Analyzers

Online Continuous Monitoring

The Nova Tri-gas analyzers are designed specifically for monitoring H2 purity in the H2 feed to a power generator and to monitor the purging procedure during shut down. The analyzer can measure the following gases by switch selection : Range 1: 0-100.0% H2 in Air; Range 2 : 0-100.0% H2 in CO2; Range 3 : 0-100.0% Air in CO2. A 4-20 mA output is provided for the range of 85-100% H2 in air, along with two gas alarms and a sensor fail alarm.

Applications

For continuous analysis of hydrogen (H2) purity and for purge monitoring of hydrogen-cooled generators and synchronous converters.

Options
  • Isolated analog, RS232, RS485, MODBUS and Ethernet output available options.
  • Auto calibration option which includes the following features :
    • Touch-screen display for easy entry of calibration gas settings, alarm set points, and calibration frequency
    • One-touch 'cal-now' button (magnetic switch in explosion proof control cabinet) permits easy, and complete calibration without needing to open cabinet cover
Calibration
  • Channel 1 - Air for Zero, 100% H2 for Span
  • Channel 2 - 100% CO2 for Zero, 100% H2 for Span
  • Channel 3 - 100% CO2 for Zero, Air for Span
  • One analyzer monitors all 3 gases for purity (Range 1) or purging (Ranges 2 and 3) :
    • Range 1 : 0-100% H2 in Air
    • Range 2 : 0-100% H2 in CO2
    • Range 3 : 0-100% Air in CO2
  • Best value continuous tri-gas analyzer
  • Bright digital readout, 4-20 mA Outputs
  • Long life electrochemical thermal conductivity cell with high accuracy and repeatability, cannot be burned out.
  • Explosion proof gas detector enclosure suitable for Class 1 Division 1 Group BCD rated areas, UL/FM/CSA certified
  • Fast response (T90 -10 to 15 secs)
  • Easy to maintain modular layout
  • Built in pressure regulator
Specifications 436PMN7 436N7MC 436N4N7 436RMN7
Method of Detection Temperature controlled thermal conductivity (T/C) cell, cannot be burned out due to loss of flow or changing gases Temperature controlled thermal conductivity (T/C) cell, cannot be burned out due to loss of flow or changing gases Temperature controlled thermal conductivity (T/C) cell, cannot be burned out due to loss of flow or changing gases Temperature controlled thermal conductivity (T/C) cell, cannot be burned out due to loss of flow or changing gases
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% 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
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 0.2% absolute H2 ±1% F.S except in 85-100% H2 in Air range which is within 0.2% absolute H2 ±1% F.S except in 85-100% H2 in Air range which is within 0.2% absolute H2
Drift H2 in CO2 or Air in CO2 1% F.S. per week maximum drift
0-100% H2 in Air range is ±0.2% per week
H2 in CO2 or Air in CO2 1% F.S. per week maximum drift
0-100% H2 in Air range is ±0.2% per week
H2 in CO2 or Air in CO2 1% F.S. per week maximum drift
0-100% H2 in Air range is ±0.2% per week
H2 in CO2 or Air in CO2 1% F.S. per week maximum drift
0-100% H2 in Air range is ±0.2% per week
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 49 ºC
32 to 122 ºF
0 to 49 ºC
32 to 122 ºF
0 to 49 ºC
32 to 122 ºF
0 to 49 ºC
32 to 122 ºF
Linearity ±0.4% of F.S. on H2 in Air range, ±1% of F.S. in H2 or Air in CO2 ranges ±0.4% of F.S. on H2 in Air range, ±1% of F.S. in H2 or Air in CO2 ranges ±0.4% of F.S. on H2 in Air range, ±1% of F.S. in H2 or Air in CO2 ranges ±0.4% of F.S. on H2 in Air range, ±1% of F.S. in H2 or Air in CO2 ranges
Size & Weight Dimensions will vary depending on enclosure style and options required Dimensions will vary depending on enclosure style and options required Dimensions will vary depending on enclosure style and options required Dimensions will vary depending on enclosure style and options required
Power 115 VAC, 60 Hz
220 VAC, 50 Hz
115 VAC, 60 Hz
220 VAC, 50 Hz
115 VAC, 60 Hz
220 VAC, 50 Hz
115 VAC, 60 Hz
220 VAC, 50 Hz
Output Options 4-20 mA into 500 ohms non-isolated standard
Isolated 4-20 mA, RS232, RS485, MODBUS, Ethernet outputs
4-20 mA into 500 ohms non-isolated standard
Isolated 4-20 mA, RS232, RS485, MODBUS, Ethernet outputs
4-20 mA into 500 ohms non-isolated standard
Isolated 4-20 mA, RS232, RS485, MODBUS, Ethernet outputs
4-20 mA into 500 ohms non-isolated standard
Isolated 4-20 mA, RS232, RS485, MODBUS, Ethernet outputs
Alarms Alarm set points are field adjustable
Alarms have front panel light for each alarm and SPST (normally energized) relay with 5A rating at 250VAC non-inductive load
Dual alarms are provided for low H2 purity. Detector fail alarm also provided as standard
Alarm set points are field adjustable
Alarms have front panel light for each alarm and SPST (normally energized) relay with 5A rating at 250VAC non-inductive load
Dual alarms are provided for low H2 purity. Detector fail alarm also provided as standard
Alarm set points are field adjustable
Alarms have front panel light for each alarm and SPST (normally energized) relay with 5A rating at 250VAC non-inductive load
Dual alarms are provided for low H2 purity. Detector fail alarm also provided as standard
Alarm set points are field adjustable
Alarms have front panel light for each alarm and SPST (normally energized) relay with 5A rating at 250VAC non-inductive load
Dual alarms are provided for low H2 purity. Detector fail alarm also provided as standard
Analyzer Type Tri-Gas Analyzer Tri-Gas Analyzer Tri-Gas Analyzer Tri-Gas Analyzer
Hazardous Area Rating Options Class 1, Div 1, Grp A-D Hazardous Area Rating Class 1, Div 1, Grp A-D Hazardous Area Rating Class 1, Div 1, Grp A-D Hazardous Area Rating Class 1, Div 1, Grp A-D Hazardous Area Rating
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