Canadian engineering. Safer air, everywhere. Three decades of gas detection expertise.

Critical Environment Technologies (CET) is the largest independent commercial gas detection manufacturer in North America, bringing three decades of Canadian engineering rigor to some of the most demanding environments in the built world from parking garages and boiler rooms to data centers, wineries, ice arenas, and refrigeration plants. Headquartered in Delta, British Columbia, CET has developed more than 100 gas detection products, with installations across every U.S. state and Canadian province and in more than 20 countries worldwide. CET pairs decades of field experience with purpose-built compliance solutions like Chill Sense, Boiler Sense, and Park Sense, backed by a full range of sensor technologies electrochemical, infrared, and photoionization capable of monitoring more than 50 toxic, combustible, and refrigerant gases. Whether you're protecting a hyperscale data center, a commercial parking structure, or a critical industrial process, CES is proud to represent CET across the region, with the technical expertise to help you select, specify, and support the right gas detection solution for every project.