Critical Environment Technologies

The Gas Detection Experts.

Critical Environment Technologies (CET) is a leading innovator in gas detection and indoor air quality monitoring systems. Serving commercial, institutional, and light industrial sectors, CET designs and manufactures advanced equipment that helps protect people and property from hazardous gases such as carbon monoxide, nitrogen dioxide, ammonia, and refrigerants. 

Our products are used in diverse environments—from parking garages and boiler rooms to schools, hospitals, wineries, and data centers. With over 100 unique products and installations in more than 20 countries, CET is recognized globally for its commitment to safety, reliability, and environmental responsibility. Our systems integrate seamlessly with ventilation and alarm systems, ensuring real-time response to air quality threats while optimizing energy efficiency.