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Thermo 42CHL Thermo Scientific Get Quote



The Model 42C High Level (42-HL) combines the superior optical, mechanical, and chemical characteristics of its predecessor, the Model 42H, with an enhanced electronics package and user interface. The outcome is a powerful, easy-to-use, chemiluminescent based analyzer capable of measuring oxides of nitrogen from parts per billion (ppb) to 5000parts per million (ppm). Using Chemiluminescence, the 42C series is capable to measuring oxides of nitrogen from sub parts per billion (ppb) to 5,000 parts per million (ppm). Extended troubleshooting diagnostics provide instantanuous indication of instrument operating status.

Key Features

  • Remote Performance Diagnostics
  • Oil-Less Vacuum Pump
  • Multi-Line Alpha Numeric Display
  • Electronic Diagnostic Transducer
  • Wide Dynamic Range
  • Dedicated Communications Processor

Technical Specifications

Range 0-10, 20, 50, 100, 200, 500, 1000
Noise 25 ppb
Detection Limit 50 ppb
Zero Drift (24 hour) 50 ppb
Span Drift (24 hour) ±1% full scale
Rise Fall Times (0-90%) 2.5 seconds NO Mode
Linearity + 1% full scale
Sample Flow Rate 25 cc/min. with Bypass 2 SCFH
Vacuum 28.5\" Hg
Power requirements 90-110, 05-125, 210-250 VAC
Outputs selectable voltage 0-10 mv, 100 mv, 1v, 5v, 10v, 4-20 mA Isolated (optional)


  US Metric
Dimensions 17 x 8\" x 23\"\" -


  US Metric
Weight 70 lbs -