SGS™ - Nitrex
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- SGS™ -




Integrated thermal conductivity sampling system

The SGS™ – Single-Gas Sensor measures hydrogen content with high accuracy in binary or quasi-binary process atmospheres. The SGS™ is low maintenance and boasts a long service life which eliminates the need for heated sample lines, filters, etc. The SGS™ can be stand-alone or integrated into a new or existing control system.

Ideal for measuring hydrogen content or dissociation level with high accuracy in nitriding and nitrocarburizing atmospheres, the SGS™ is also capable of calculating KN and KC for controlled nitriding and nitrocarburizing.

The integral sampling system eliminates the need for a separate external system. This one-piece SGS™ sensor is mounted directly on the process exhaust line or a sample port and uses the Venturi effect to sample the atmosphere.



  • Integral sampling eliminates the need for a separate sampling system
  • Sampling flow is generated by Venturi effect using either process atmosphere or exhaust gases, depending on the sensor’s installation location
  • Sensing block and electronics embedded in the same enclosure
  • Integrated web server with access to diagnostics, configuration, and maintenance
  • Optional calculation of nitriding and carbon potential for nitriding and nitrocarburizing
  • Analog signals and industrial protocols available
  • O2 sensor and O2 sensor temperature inputs available


  • Accuracy: +/- 0.6% of reading plus +/- 0.4% of full scale
  • Linearity: < 0.5% of full scale
  • Repeatability: < 0.5% of full scale
  • Zero drift: < 0.5% of full scale per month
  • Response time: 95% in 60 sec
  • Power requirements: 24VDC, 1.5 amps max.
  • Input/outputs: 2x analog OUT, sourcing, isolated; 4 – 20 mA (R
  • Working pressure: ambient +/- 35 mbar (0.5PSI)
  • Can be used in equipment with vacuum purge (no measurement in vacuum)
  • Process connection: KF25 flange

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