For checking purity of hydrogen (H2) in H2-cooled generators and synchronous converters. The Model 381 Series will also monitor the safe purging of H2 during shutdown or startup. This model is designed specifically for generators that are purged with nitrogen (N2) instead of carbon dioxide (CO2).

The Nova 381 Series Tri-Gas Analyzer is designed for monitoring the H2 purity inside a power generator and to monitor the purging procedure during a generator shutdown or startup. This analyzer is
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Unit of Measure

Specifications

Method of Detection

Thermal conductivity (T/C) cell, electrochemical O2 sensor

Ranges Available

Range 1: 0-100% H2 in Air
Range 2: 0-100% H2 in N2
Range 3: 0-100% Air in N2

Resolution

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

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

Response Time (T-90)

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

Ambient Temperature Range

0 to 50 ºC32 to 120 ºF

Linearity

± 1.0% of F.S. on H2 in Air range. ± 2% of F.S. in H2 or Air in N2 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)

Power

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

Output Options

4-20mA

Hazardous Area Rating Options

General Purpose, Non-Hazardous

Applications

N/A For checking purity of hydrogen (H2) in H2-cooled generators and synchronous converters.

Features

N/A

  • Rugged design that is easy to operate
  • Fast warm up and response
  • Monitors 0-100% H2 in air, 0-100% H2 in N2, 0-100% Air in N2
  • 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 cabinet (K) is weatherproof when closed
  • Sample pressure ranges 0.5 PSI to 125 PSI

Options

N/A

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

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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