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Net Safety Millennium ST Electrochemical Toxic Gas Detector
Northeast Controls is pleased to be the authorized Emerson representative to sell this product line for Municipal Water and Wastewater applications, and as part of an overall Integrated Solution for all applications and industries.
The Millennium ST Series of toxic gas detectors utilize electrochemical sensing technology to continuously monitor your site for a wide range of toxic gas types.
The Millennium ST Series of sensors are fast, accurate, and requires only periodic calibration and maintenance with a typical sensor life of 3-5 years.
Net Safety Millennium ST Electrochemical Toxic Gas Detector


Operating Temperature
H2S: -40 °C to +50 °C (-40 °F to +122 °F)
Enclosure Rating
Stainless Steel: 3.5 lbs (1.4 kg)
Aluminum: 1 lb (0.4 kg)
Humidity Range
0-95% non-condensing
Class I Division 1 Groups BCD T5
Ex d IIB+ H2 T5
Class I Zone 1 AEx d IIB +H2 T5
Ex d IIB+H2 T5 Gb
2 years


  • Low operating voltage
  • Long range (+2,000 ft.) sensor separation
  • Numerous ppm ranges, full range of gas toxicity
  • Two wire sensor separation reduces installation costs
  • Intuitive menu system, simple set-up and calibration
  • CSA certified
  • Analog or relay configurations
  • Explosion-proof, Class I, Division 1