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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.

ST Series Sensor Hydrogen Sulfide H2S (ST1200) Carbon Monoxide CO (ST1600) Chlorine Cl2 (ST1500) Ammonia NH3 (ST1700)
Detection Range 0–20/50/100 ppm 0–500 ppm 0–10 ppm 0–100 ppm
Accuracy/Repeatability 3 % full scale/ 1 % full scale 3 % full scale/ 1 % full scale ±2 ppm or ±15 % of reading, whichever is greater/ 2 % full scale 5 % full scale/ 10 % full scale
Span Drift < 2 % full scale/mth < 5 % full scale/yr < 2 % full scale/mth < 2 % full scale/mth
Response Time < 30 s – T90 < 30 s – T90 < 60 s – T80 < 90 s – T90
Operating Temperature -40 °C to +50 °C (-40 °F to 122 °F) -20 °C to +50 °C (-4 °F to 122 °F) -20 °C to +50 °C (-4 °F to 122 °F) -10 °C to +50 °C (14 °F to 122 °F)
Output Analog 4–20 mA: Max. loop impedance of 800 ohms at 32 VDC or 150 ohms at 10.5 VDC. Isolated or non-isolated loop supply Relays: 3 Form C contacts rated 5 A at 30 VDC/250 VDC
Humidity Range 0-95% non-condensing
Ingress Protection (IP) Rating IP64
Enclosure Material Powder Coated Aluminum 6061 (316 Stainless Steel Optional)
Certifications/Approvals CSA and NRTL/C certified for hazardous locations. Class I, Division 1 (*Division 2 only), Groups C and D. IEC Rating Ex d IIB T6 NEMA 3R
Net Safety Millennium ST Electrochemical Toxic Gas Detector

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