Gas Detection Manufacturer — 30 Years of Excellence

Critical Environment Technologies

Safer Air Everywhere. Industry-leading gas detection systems protecting parking garages, warehouses, data centers, chiller rooms, and hundreds of other critical environments across North America.

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30+Years of gas detection excellence

15+Application verticals protected

4Product families from controllers to specialty systems

Applications We Protect

Parking Garages Warehouses Data Centers Ice Arenas Boiler Rooms Hospitals Schools Hotels Emergency Vehicle Bays Grow Rooms Wineries Wastewater Treatment Car Dealerships Chiller Rooms Indoor Air Quality

Controllers

System Controllers

Advanced control systems providing centralized monitoring, alarm management, and BAS integration for comprehensive gas detection coverage.

FCS Multi Channel System Controller

FCS Series

High-performance multi-channel controller with logic and priority settings for monitoring toxic, combustible, and refrigerant gases. Supports Modbus® and BACnet® communication with BAS, plus 4–20 mA and Modbus®-driven VFDs. Scalable for complex, multi-zone facilities.

cGas-SC Self-Contained Controller

cGas-SC

Up to 3 gas channels in a self-contained unit with Plug & Play Smart Sensor Technology. Configurable logic control and priority settings for superior user customization. Ideal for smaller facilities requiring standalone gas detection without a separate controller panel.

Gas Detectors & Sensors

Reliable monitoring for toxic, combustible, and refrigerant gases. Plug & Play Smart Sensor Technology throughout for easy installation and field maintenance.

VRF IR Refrigerant Transmitter

cGas-VRF-IR

Non-dispersive infrared refrigerant detector purpose-built for VRF HVAC systems. Aesthetic design for modern commercial buildings requiring acute leak detection.

Digital Transmitter

cGas-D

1 or 2-channel Modbus® or BACnet® gas detector with flexible customization and Plug & Play Smart Sensor Technology. Suits toxic, combustible, and refrigerant gas monitoring.

IR Refrigerant Transmitter

cGas-A-IR

Non-dispersive infrared sensor for refrigerant leak detection in chiller rooms, mechanical rooms, and HVAC equipment spaces. Single-channel analog output.

Analog Transmitter

cGas-A

Single-channel analog gas detector with Plug & Play Smart Sensor Technology. Straightforward installation for facilities requiring reliable point detection.

Detector for Indoor Public Spaces

cGas-AP

Designed for schools, hospitals, hotels, and commercial spaces where aesthetics and occupant comfort matter. Monitors CO and other gases with RHT sensing.

Low Power Transmitter

LPT

Low-power gas transmitter optimized for applications with limited power availability. Suitable for oxygen depletion monitoring in confined and hard-to-wire locations.

Remote Sensor Head

ESH-A

Remote electrochemical sensor head for use with compatible transmitters and controllers. Extends monitoring reach to difficult or hazardous locations.

Remote Devices & Peripherals

Strobes, stack lights, displays, relays, and network peripherals that complete a fully integrated gas detection system.

Remote Stack Light

RSL

Modular LED tower light with selectable colors and steady or flashing modes. Pole-mounted with two sound types for clear visual and audible alarm indication from a distance.

Remote Display Module

RDM

Secondary-location display showing live gas level readings, channel status, and faults from the FCS controller. Configurable display settings for any monitoring room.

Remote Switch

RSW

Push-button manual override for emergency shutdown, equipment activation, or system reset. Satisfies compliance requirements where manual intervention capability is mandated.

Remote Relay Modules

RLY-4 / RLY-8

Expand relay output capacity from the FCS controller. Available in 4-relay and 8-relay configurations for fan control, damper actuation, and equipment switching.

Analog Output Peripheral

LNK-AO

Adds 4 additional analog outputs to the detection network. Enables integration with additional BAS points and VFD control signals.

Network Extender

LNK-XT

Extends the CET device network for large facilities or multi-zone installations where additional cable runs are required beyond standard network limits.

Specialty Products

Specialty & Sample Draw Systems

Specialized solutions for applications where direct sensor placement is impractical — shafts, pits, tall ceilings, confined spaces, and refrigeration vent lines.

Sample Draw System

cGas-SD

Self-contained, single-sensor sample draw unit that actively pulls air from locations where direct detector installation is not feasible. Ideal for high-ceiling warehouses, enclosed pits, and remote monitoring points.

Sample Draw Pump Unit

PRU-24-A

Connects to an existing gas detector and draws sample air through tubing from shafts, tall ceilings, wells, pits, and confined spaces across the sensor and out the exhaust port.

Ammonia Vent Line Transmitter

cGas-A-VLT

Continuous ammonia monitoring mounted directly on the vent relief stack of refrigeration systems. Detects equipment failure in ice arenas, cold storage, and industrial refrigeration plants.

Why Critical Environment Technologies?

CET has spent 30 years engineering gas detection systems for the most demanding commercial and industrial environments in North America. Their Plug & Play Smart Sensor Technology means sensors are field-replaceable without recalibration, dramatically reducing maintenance time and cost.

CEE supplies and supports CET systems for HVAC contractors, mechanical engineers, and facility managers requiring code-compliant gas detection across any building type.

Talk to a Specialist

Plug & Play Smart Sensor Technology — field-replaceable sensors, no recalibration required
Modbus® and BACnet® communication for seamless BAS integration
Covers toxic, combustible, oxygen, and refrigerant gas types
VRF-specific IR refrigerant detectors for modern HVAC systems
Multi-channel FCS controllers scalable to any facility size
Sample draw systems for hard-to-reach monitoring locations
Remote displays, stack lights, and relay modules for complete system integration
Ammonia vent line monitoring for refrigeration & ice arena applications
30+ years of North American gas detection expertise

Need Gas Detection for Your Facility?

Our team will help you select the right CET system for parking garages, chiller rooms, data centers, or any critical environment application.

Critical Environment Technologies (CETI)