Critical Environment Technologies Canada, Inc. (CETCI) is a leading global manufacturer of fixed gas detection systems and Indoor Air Quality (IAQ) monitoring instruments. Our gas detectors are available in dust/water tight housing and depending on the model, have LED and/or LCD display, audible alarm, relays, data-logging capabilities, and detect one or more gases. We offer a variety of sensor technologies that detect many different types of hazardous gas in a wide range of applications. Common gases are Carbon Monoxide, Carbon Dioxide, Nitrogen Dioxide, Nitric Oxide, Ammonia, Chlorine, Ozone, Oxygen, Refrigerants and combustible gases like Methane and Propane. Applications include commercial, institutional, municipal and light industrial markets worldwide. Many applications are for vehicle exhaust, but areas of specialization include refrigeration plants, swimming pools, water purification, arenas, airports, hotels, waste water treatment plants, oil and gas utilities, and more.

Company details

Unit 145, 7391 Vantage Way , Delta , British Columbia V4G 1M3 Canada

Locations Served


Business Type:
Industry Type:
Monitoring and Testing - Air Monitoring and Testing
Market Focus:
Globally (various continents)
Year Founded:

Critical Environment Technologies Canada Inc. (CETCI) was founded in 1995 to develop and manufacture hazardous gas detection systems for the commercial HVAC markets of the world. Located on the west coast of Canada in Delta, British Columbia places us in a strategic global location as our products are sold through a network of authorized distributors around the world.

In 2007 CETCI acquired YES Environmental Technologies, Inc. and the YES brand of IAQ monitoring instruments. The YES brand has established itself as an industry leader and innovator in the IAQ market. YES was the first company in the world to manufacture a miniature electronic recording IAQ monitor. IAQ monitors are a logical addition to the wide range of fixed system gas detectors manufactured by CETCI.

Today, Critical Environment Technologies Canada Inc. continues to manufacture high quality, value added gas detectors. All aspects of product design, development and production are done in-house by a competent, innovative and professional team of people who are dedicated to generating solutions to meet our customers’ application needs. We pride ourselves in our commitment to customer satisfaction, safety and environmental protection.

Know the air you are breathing.