News & Updates

Stay informed about the latest developments, product announcements, and industry insights from Critical Environment Technologies.

October 28, 2026

CET Introduces Next-Generation Lead-Free O₂ Sensor for cGas Detectors

A next-generation lead-free oxygen (O₂) sensor delivering a longer lifespan, shorter warm-up time and more reliable oxygen monitoring.

September 11, 2026

Analog Gas Detection Integration: Proven, Reliable Connections for Ventilation and Alarm Control

For facilities seeking straightforward ventilation control, alarm activation and BAS connection, analog communications continue to provide exceptional value.

September 11, 2026

Digital Gas Detection Integration: BACnet, Modbus and Smart Building Connectivity

Digital communications transform gas detection from a standalone safety system into a connected source of operational intelligence offering better visibility, improved maintenance capabilities and greater control over ventilation and alarm systems.

August 3, 2026

Specifying a Gas Sensor: A Technical Guide for Engineers and Dealers

This guide walks through gas sensor technology selection, the codes and standards that typically govern the spec, output and integration requirements, and the stocking considerations that keep a distribution channel responsive.

August 3, 2026

CET Adds NDIR Combustible Gas Sensor Options to cGas Detector Family

CET has expanded its cGas gas detection platform with advanced non-dispersive infrared (NDIR) sensors for methane and propane detection, providing a highly reliable and accurate solution for monitoring combustible gases.

July 30, 2026

Combustible Gas Detection: NDIR vs Catalytic Technology

While NDIR technology is increasingly being adopted due to its durability, low maintenance and resistance to sensor poisoning, catalytic sensors continue to remain highly relevant due to their lower cost, broad combustible gas response and ability to detect hydrogen.

July 17, 2026

Analog vs. Digital Gas Detection Integration: Which Connection Method Is Right for Your Building?

There is no universal winner in the analog versus digital debate. Both approaches deliver safe and effective gas detection integration when properly designed and maintained.

June 23, 2026

What Is the Respiratory Zone? A Guide to Gas Detector Placement

This guide explains what the respiratory zone is, how it relates to gas behavior, and how to use it as the basis for correct detector placement across a wide range of applications.

May 15, 2026

Why Integrate Gas Detection into BMS, BAS or PLC Systems?

Integration with BMS, BAS or other type of control system enables automated ventilation and safety controls and ensures responsive facility management.

April 27, 2026

Why Gas Detection Matters in Places Meant for Play

Recreation facilities are complex buildings with many potential gas hazards. While guests are focused on their laps around the pool or personal bests on the treadmill, gas detectors are focused on something else entirely - the air they are breathing.

March 13, 2026

Hidden Air Quality Risks in Transit Hubs

Transit facilities face a variety of air quality challenges, from diesel exhaust in bus terminals to particulate matter in subway stations and elevated CO₂ levels in crowded passenger areas. Without proper monitoring and ventilation, these pollutants can affect passenger comfort, employee health, and overall facility safety.

March 6, 2026

When Gas Detection Drives Ventilation: Smarter, Safer, More Efficient Buildings

When gas detection systems are integrated correctly, they become the intelligence layer that drives ventilation, improving safety, reducing energy use, and extending equipment life.

March 2, 2026

Diffusion and Gas Detection

A gas detector is only as good as the gas that reaches it and diffusion is one of the process that decides how well that happens.

January 26, 2026

Signs and Symptoms of Propane Gas Exposure

Learn to recognize the warning signs of propane gas exposure and what to do if you suspect a leak in your home or facility.

January 26, 2026

Understanding VRF Systems and Refrigerant Safety

A comprehensive guide to Variable Refrigerant Flow (VRF) HVAC systems and the importance of refrigerant leak detection for building safety.

January 14, 2026

New Year, New Safety: Why Now Is the Perfect Time to Review Your Gas Detector Maintenance

A fresh year calls for fresh safety checks - make gas detector maintenance your first resolution.

January 12, 2026

Next Generation Calibration Cap

Improved diffusion model calibration cap for stable calibration across all environments.

December 2, 2025

Why Infrared Refrigerant Gas Sensors Outperform Solid-State Sensors

Infrared sensors stand out as a superior solution, offering significant advantages over traditional solid-state sensors.

November 19, 2025

cGas Detector VRF IR Advanced Safety for Modern HVAC Systems

Provides continuous monitoring for acute refrigerant leaks in modern energy-efficient buildings utilizing Variable Refrigerant Flow (VRF) HVAC systems.

November 3, 2025

Monitoring the Invisible Gas in Data Centers

One key safety issue that data centers face is the buildup of hydrogen gas in the battery rooms. Hydrogen gas detectors are essential to ensure the safety of people and property.

October 30, 2025

Trusted Integration: CET Gas Detection + Ventilation Fans for Safer, Smarter Buildings

With 30+ years of experience, we provide reliable integration. CET gas detection systems seamlessly work with diverse ventilation fans, delivering energy‑efficient solutions that boost safety and cut operating costs.

October 21, 2025

Best Practices for Gas Detection and Safety Compliance in Chiller Rooms

A gas detection system in a chiller room is not just a precaution"”it's a critical safety measure.

October 19, 2025

Manufacturer Recommendations for Testing and Calibrating CET Gas Detection Systems

Regular maintenance, calibration and inspection of the gas detection system helps identify and correct problems before they escalate and lead to false readings or missed detections.

October 19, 2025

A Guide for Maintaining Gas Detectors

Regular maintenance and inspection of the gas detection system helps identify and correct problems before they escalate and lead to false readings or missed detections.

October 5, 2025

Why the Sensor Coverage Range is Larger in Parking Garages

The sensor coverage range for CO and NO₂ gas detectors in parking garages is larger than many other applications. Find out why.

September 24, 2025

The Advantages of Infrared Refrigerant Gas Sensors over Solid State Sensors

Infrared refrigerant gas sensors offer a powerful combination of accuracy, reliability, and low maintenance, making them an excellent choice for modern HVAC and refrigeration systems.

July 29, 2025

cGas-SD: A Smarter, Simpler, and More Capable Sample Draw System

Designed to replace the legacy DCC-SD and DCC-MRI systems, the cGas-SD brings a new level of performance, usability, and flexibility to gas detection in hard-to-access environments.

July 29, 2025

Why a Multi-Point Sample Draw System May Not Be the Right Choice

While multi-point sample draw systems can seem efficient, they come with significant risks and drawbacks that may outweigh their benefits in critical gas detection applications.

July 21, 2025

The Dual Nature of Oxygen

Oxygen is essential for life, yet it can also pose significant risks. Ensuring that oxygen levels are properly monitored and maintained is vital for safeguarding human health and safety.

June 20, 2025

Introducing the cGas-SD: A Smart Solution for Hard-to-Reach Gas Monitoring Challenges

The cGas-SD Sample Draw System elevates your safety standards with precision monitoring.

May 23, 2025

Gas Detectors: Vital Safety Systems for Preventing Injuries, Illness, and Death

Gas detectors are vital safety devices designed to monitor and measure potentially lethal gases in various environments, safeguarding lives, property and the environment.

May 8, 2025

Height Matters: Gas Detector Mounting Height

The height at which to mount a fixed gas detector depends on the density of the target gas relative to air and can also depend on the on the type of application.

May 5, 2025

Ensuring Safety and Efficiency in Greenhouse Facilities

The integration of gas detection systems in greenhouse production and oil extraction facilities is essential for maintaining safety and efficiency.

April 10, 2025

Celebrating 30 Years of Innovation: The Evolution of Gas Detection at Critical Environment Technologies

At CET, we've been at the forefront of the gas detection evolution. Our journey over the past 30 years has been marked by continuous improvement and a commitment to excellence.

January 25, 2025

FAQ About Ammonia Gas Detection Systems

Ammonia is a corrosive, toxic gas or liquid used in manufacturing and refrigeration. Exposure to high levels of ammonia can be fatal. Learn the ins and outs about ammonia gas detection systems.

January 15, 2025

Understanding A2L Refrigerants: Safety, Standards and Detection

A2L refrigerants offer a safer and more environmentally friendly alternative to traditional refrigerants, but they require careful handling and specific safety standards to mitigate potential hazards.

January 3, 2025

Making the Conversion Easier: Converting ppm to %vol

With practice and the right tools, this conversion becomes simple—an essential part of accurate, compliant gas detection.

November 28, 2024

The Importance of Low Temperature Options in Gas Detectors

By incorporating a low temperature package, gas detectors can provide reliable performance and safety across a wider range of environments.

November 4, 2024

Ensuring Safety with Gas Detectors: Best Practices

Ensuring safety with gas detectors involves proper usage, calibration, and maintenance to effectively monitor hazardous gases and protect lives and property.

October 25, 2024

How to Convert ppm to %vol

This technical resource from Critical Environment Technologies provides essential information for gas detection professionals, facility managers, and safety engineers.

September 29, 2024

Bedbug Problem? Carbon Dioxide (CO₂) Solution!

Bedbug infestation is an extremely common problem worldwide.

September 5, 2024

Fixed vs Portable Gas Detection Equipment

When choosing between fixed and portable gas detectors there are many factors to consider to ensure the proper monitoring measures are being taken to ensure the health and safety of occupants.

August 28, 2024

Navigating the Hazardous Gases in Breweries

When considering the hazardous gases in a brewery, CO2 is likely the first to come to mind. While it plays a crucial role in brewing, other gases like ammonia, nitrogen, and ozone can also be present.

June 26, 2024

Miswire could cause a circuit board fire!

Gas detectors rely on accurate signals to detect gas concentrations. Proper wiring prevents interference, signal loss, or noise that could affect the detector's performance.

June 19, 2024

The Oxides of Nitrogen - NO and NO₂

Both NO and NO₂ are produced during the combustion process and are emitted into the air through the exhaust of gasoline run vehicles. What other similarities and differences do the two gases have?

May 22, 2024

Even when you are inside a building, you may not be safe!

Wildfire smoke contains fine particles that can irritate the respiratory system, damage lung tissue, and increase long‑term health risks. Even indoors, you’re not fully protected from its harmful effects.

April 13, 2024

The Wonders of Ammonia & Chlorine

They are all around you, be aware of them and stay safe.

March 18, 2024

Calibration Could Save Your Life

Many gases—some detectable by humans, others not—can leak into the spaces where we work and play, becoming dangerous when they exceed safe concentrations.

March 6, 2024

Solid State Gas Sensors & Factors Affecting Life Expectancy

Solid‑state sensors are versatile and can detect many gases, but they require clean, stable environments with minimal temperature and humidity fluctuations.

February 19, 2024

Non-dispersive Infrared Gas Sensors & Factors Affecting Life Expectancy

Non-dispersive infrared sensors accurately detect CO2 and refrigerant gases without cross interference from toxic or combustible gases because the absorption of the infrared light occurs at a wavel...

January 22, 2024

At What Height Should Sensors be Mounted?

Proper sensor placement is critical for effective gas detection. The mounting height and location of sensors directly impacts their ability to detect hazardous conditions and protect personnel. Thi...

January 7, 2024

Catalytic Gas Sensors & Factors Affecting Life Expectancy

Catalytic sensors are used for detecting combustible, or flammable gases, such as methane, propane and hydrogen. They are a safe and reliable combustible sensor technology that has been used for man..

January 7, 2024

Electrochemical Gas Sensors & Factors Affecting Life Expectancy

Electrochemical sensors provide highly accurate monitoring of toxic gases and oxygen, but their longevity depends on factors such as temperature, humidity, contamination, gas exposure, and proper maintenance.

December 5, 2023

Reasons to Replace Gas Sensors

Gas detection transmitters play a crucial role in safeguarding lives and property by monitoring and detecting hazardous gases in the environment. These devices consist of various components, with sens

October 15, 2023

What CO₂ Gas Detector Do You Need?

CET offers CO₂ gas detectors for indoor air quality and for life, health and safety applications with various ranges, units of measure and alarm levels that are fully programmable in the field.

September 13, 2023

Can the Same Gas Detector Work for Pools and Arenas?

Many recreational facilities offer both skating and swimming amenities, two very different environments with several different potential gas hazards. How many gas detectors are really needed?

May 21, 2023

Formaldehyde is More Common Than You Might Think

Formaldehyde is a chemical with no colour and an unpleasant smell. At room temperature it is a gas and it also comes in a liquid solution form. Formaldehyde can cause irritation of the skin, eyes, no.

April 17, 2023

Carbon Dioxide Monitoring

CO2 is naturally occurring all around us and in low concentrations it is not the least harmful. However, CO2 has the potential to exist in unhealthy concentrations in a multitude of applications which

March 27, 2023

Gas Detection in Boiler Rooms: Why It's Essential for Safety and Compliance

Boiler rooms play a vital role in building operations, but they also pose serious safety risks due to the potential buildup of hazardous gases. Typically located in unfrequented areas, continuous gas detection monitoring is crucial to ensure personnel remain aware of any dangerous conditions.

March 22, 2023

The Ventilation and Gas Detection Connection

Advancements in gas detection technology has made energy and cost management possible by connecting the two systems together and putting the gas detection system in the driver's seat to run the ventil

March 14, 2023

How Often Should Gas Detectors be Calibrated?

Calibration frequency is one of the most commonly asked questions concerning the use of gas detection instruments. The answer depends on a number of factors, including the type of gas detection system

January 28, 2023

Healthier Indoor Air Quality Improves Efficiency

Everyday exposure to indoor pollutants can cause you to lose life expectancy and you may die years earlier then you should!

January 13, 2023

Bump Testing vs Calibration

Most malfunctions are discovered at the time of calibration or bump testing, meaning at some point between calibrations the gas monitor manifested a problem.

January 11, 2023

Gas Detectors Offer Safety, Comfort and Efficiency

Gas detectors play a crucial role in building automation and control systems, providing real-time data on a range of factors that impact the safety and comfort of building occupants.

January 8, 2023

Introducing ChillSense, BoilerSense, and ParkSense: CET's Targeted Compliance Solutions for Safer Buildings

Navigating gas detection regulations can be complex. CET makes it simple with our Sense Series of compliance solutions: ChillSense, BoilerSense and ParkSense each tailored to specific applications

January 2, 2023

Sound the Alarm!

Remote audible/visual devices offer superior notification because they are loud and bright and more likely to promote a generalized and appropriate human response to an emergency situation.

October 17, 2022

cGas IR Refrigerant Detector from CET

CET has launched a brand new non-dispersive infrared, dual beam gas detector for accurate, low level detection of a wide variety of refrigerants, including A2L refrigerants, SF6 and CO2 (R744).

September 14, 2022

Indoor Air Quality Myths Debunked

Today's buildings, whether it is a home, office, manufacturing plant, hospital, etc., are more energy efficient; however, they also foster a potentially harmful environment. Indoor Air Quality (IAQ) h

June 23, 2022

High Range A2L Refrigerant cGas Detectors Meet the Standard

CET"s high range A2L refrigerant gas detectors satisfy the ASHRAE 15-2024 standards, complying with the 25% LFL alarm point and ensuring comprehensive safety and compliance for all your commercial ref

April 12, 2022

CETCI's CXT2 Explosion Proof Transmitter

It only takes a spark to start a fire or cause an explosion, especially when flammable gases or vapours are present under the right conditions.

April 30, 2019

What Could be Leaking in the Boiler Room?

Natural gas is a flammable gas that is commonly used in building heating systems such as schools, universities and dormitories. It consists primarily of methane gas. The source of the natural gas is..

April 30, 2019

Gas Detection Etiquette in the Kitchen

Gas cooking equipment such as grills, stoves and fryers in restaurants, hotels and other commercial kitchens often use natural gas or propane for an energy supply. If a burner was left on or a fitting

July 26, 2018

What Cal Gas Concentration Should You Use?

This technical resource from Critical Environment Technologies provides essential information for gas detection professionals, facility managers, and safety engineers.

July 24, 2018

Chlorine and Ozone Gas Detection Systems in Aquatic Recreation Facilities

A gas detection system is an important and required component for ensuring the health and safety of everyone in an aquatic recreation facility. Below is some general information about both gases

June 8, 2018

A Few Facts About Ozone

Classification Toxic, oxidizing agent, powerful disinfectant Molecular Formula O3 Molecular Weight 47.997 g/mol Fire Hazard Rating Risk of fire and explosion on contact with combustible substances M..

May 7, 2018

What are CET's Digital Devices’ Communication Protocols?

Modern gas detection systems support various communication protocols for integration with building automation and control systems. Understanding these options helps optimize system design.

February 28, 2018

Bump Testing Ammonia Sensors

Bump testing a gas sensor involves flowing a concentration of gas that is slightly higher than the Low alarm setpoint of the gas detector for a short period of time (1-2 minutes or less).

November 14, 2017

A Few Facts About Ammonia

Classification Inorganic, toxic gas Molecular Formula NH3 or H3N Molecular Weight 17.031 g/mol Fire Hazard Rating Slight to moderate, on its own The presence of oil or other combustible materials incr

October 5, 2017

Target Market and Gas Hazards Chart

Different industries and applications face different gas hazards. This reference chart helps identify the relevant gases for common market segments.

October 5, 2017

Suggested Alarm Setpoints (includes sensor coverage)

Properly configured alarm setpoints are crucial for early warning while avoiding nuisance alarms. The following guidelines are based on occupational exposure limits and industry best practices for ...

October 5, 2017

How Long do Sensors Last?

Understanding sensor lifespan is essential for planning maintenance schedules and ensuring continuous protection. Different sensor technologies have varying life expectancies based on their operati...

October 5, 2017

What are some of the Industry Abbreviations?

The gas detection industry uses many specialized abbreviations and acronyms. This reference guide covers the most commonly encountered terms.

October 5, 2017

Where to Mount CO & NO2 Sensors for Diesel Exhaust Applications

October 5, 2017

Q&A about Fixed Systems

Fixed gas detection systems are permanently installed throughout a facility. They continuously monitor for specific gases and automatically trigger alarms, ventilation systems, or other safety measures when dangerous concentrations are detected.

October 5, 2017

What Gases Do CET Sensors Detect?

This technical resource from Critical Environment Technologies provides essential information for gas detection professionals, facility managers, and safety engineers.

October 5, 2017

Carbon Monoxide (CO) vs Carbon Dioxide (CO₂)

Carbon monoxide (CO) and carbon dioxide (CO₂) are often confused, but they are fundamentally different gases with distinct properties, hazards and gas detection requirements. Understanding these differences is essential for proper gas detection system design.

June 7, 2017

CET's FCS Flexible Control System Helps Facilities Meet California Title 24 Ventilation and Energy Management Requirements

The FCS offers an incredibly flexible control structure using alarm level settings, time of day settings, advanced logic, multiple priority levels per zone, etc. meeting the requirements of California.

March 23, 2017

Monitoring of CO, CO2 and Combustible Gases in Cannabis Cultivation

With the legalization of marijuana in many North American regions, the cannabis cultivation industry is booming.

March 14, 2017

CETCI Launches a High Performance Controller

Critical Environment Technologies is pleased to announce the release of our FCS Flexible Control System multichannel controller.

September 23, 2016

How do You Know if Your Gas Detector is Working Properly?

Regular testing and calibration are essential to ensure gas detection equipment functions correctly when needed. This guide covers the key procedures for verifying detector operation.

March 31, 2016

IP Ratings vs NEMA Ratings: Is There a Conversion Guide?

IP and NEMA ratings both help users evaluate enclosure protection, but they do so using different standards and testing criteria and as a result are not interchangeable. Unlike measurement systems such as kilometers / miles or Celsius / Fahrenheit, there is no direct one-to-one conversion between NEMA enclosure types and IP ratings.

November 25, 2015

Gas Detection Solutions for Wastewater Treatment Facilities

Wastewater treatment plants face a wide range of gas hazards throughout every stage of the treatment process.

October 2, 2015

Calibrating Multiple Gas Detectors: Should All Gas Detectors Be Calibrated at the Same Time?

Calibrating gas detectors can be time-consuming, particularly in larger facilities with numerous sensors and gas types. However, calibrating all detectors within the same maintenance cycle is the best practice for ensuring consistent performance and maximum safety.

July 29, 2015

Explosion Proof vs Intrinsically Safe Gas Detectors: What's the Difference?

In hazardous environments, it only takes a single spark to trigger a fire or explosion when flammable gases, vapors, or combustible dust are present. Selecting the appropriate gas detection equipment is therefore critical to protecting personnel, facilities, and operations.

Residential vs. Commercial Gas Detectors: Understanding the Critical Differences

July 27, 2015