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About

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. Ongoing product development ensures that CETCI’s equipment is at the leading edge of a rapidly evolving technology.

CETCI gas detectors are used to detect many different gases. 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.

YES Environment Technologies was founded in 1987 as Young Environmental Systems and has been developing and manufacturing indoor air quality instruments and related products ever since. YES has established itself as an industry leader and innovator in the Indoor Air Quality (IAQ) market. YES was the first company in the world to manufacture a miniature electronic recording IAQ monitor. The YES brand name is well established and accepted around the world and is synonymous with quality products, competitive pricing and excellent service.

Early 2007 marked the merging of YES Environment Technologies Inc. with its larger mother company, CETCI (www.critical-environment.com). This company operates under the name Critical Environment Technologies Canada Inc. The merger allows for more resources to invest into product development, marketing and service. YES and CETCI products are sold through a network of authorized distributors around the world.