Critical Environment Technologies

Gas Detection and Indoor Air Quality Sensors


Critical Environment Technologies Canada Inc. (CETCI) is a leading global supplier of gas detection systems, including self-contained systems, controllers and transmitters, and Indoor Air Quality (IAQ) portable instruments. Applications include commercial, institutional, municipal and light industrial markets worldwide. Many of these applications are for vehicle exhaust, but areas of specialization include refrigeration plants, commercial swimming pools, water purification, arenas, wineries and breweries, waste water treatment and many more.

  • Parking Garages / Repair Shops – Gas & Diesel Engine Exhaust
  • Hospitals
  • Commercial Buildings
  • Building on Old Landfill Sites
  • Wineries & Breweries
  • Laboratories & Research Facilities
  • Warehouse Storages – Gas Tanks
  • Pools – Chlorination Equipment
  • Green Houses
  • Warehouses – Gas & Diesel Engine Exhaust


CETCI gas detectors are used to detect many different gases and come in both portable and fixed applications. Some of the most common are Carbon Monoxide, Carbon Dioxide, Nitrogen Dioxide, Nitric Oxide, Ammonia, Chlorine, Ozone, Combustible Gases like Methane and Propane, Oxygen, Refrigerants and more.

Products Include:
  • Fixed Refrigerant Leak Detection
  • Fixed Ammonia Leak Detection
  • Fixed Ozone Leak Detection
  • Fixed Carbon Dioxide Monitoring
  • Fixed Chlorine Leak Detection
  • Fixed Combustible Leak Detection
  • Fixed CO and NO2 Monitoring
  • Fixed Methane Monitoring
  • Fixed CO2 and O2 Monitoring
  • Fixed CO and NOx Monitoring
  • Fixed CH2O and O2 Monitoring
  • Portable CO2 + RH + Temp Sensor
  • Portable CO2 + CO + NOx + RH + Temperature Sensor
  • Portable CO2 + O3 + RH + Temperature
  • Portable CO2 + VOC + CH2O + RH + Temperature
  • Portable CO2 + Methane + RH + Temperature
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