Firefighters and emergency responders are often called when people smell gas or suspect a leak. These situations frequently begin with limited information, high urgency, and the public looking to responders for clear answers.
Combustible gas hazards often can’t be seen, conditions can change rapidly, and responders must make confident decisions without delays or second‑guessing. This requires instruments that are fast, clear, and dependable in real‑world field conditions.
Firefighters commonly wear a personal monitor—often referred to as a “four‑gas meter.” These instruments are primarily used for responder safety when entering burning buildings, confined spaces, or rescue environments. However, the catalytic combustible gas sensors used in most four‑gas meters generally begin responding only near the lower explosive limit (LEL) of natural gas in air, which corresponds to several thousand parts per million of methane.
As a result, firefighters may be effectively blind to trace gas levels—measured in tens of parts per million of methane—without the use of higher‑sensitivity gas leak detectors. That’s where SENSIT’s combustible gas indicators, featuring more sensitive metal oxide sensors, come in. These rugged, reliable instruments detect small gas leaks quickly, helping responders make informed decisions faster.


Galvanic atmospheric and microbiological corrosive action can impact the integrity of natural gas distribution systems. Failures are not limited to a hole in the pipe, corrosion on fittings and glands can also lead to leaks.
Material defects within pipes, components or joints due to defects or in-service stresses can lead to failure. Natural gas pipelines are pressurized and do include relief equipment should there be a failure in operation or valve control.
Temperature changes, heavy rain, floods, subsidence, landslides, earthquakes and even high winds blowing objects into infrastructure create stresses and the potential for leaks. Tree root systems are also a factor to consider with underground infrastructure.
Whether it’s through digging, grading, boring or drilling the installation and maintenance of other underground infrastructure can lead to damage of natural gas infrastructure, particularly in urban areas with dense underground infrastructure across gas, water, sewers and telecommunications.
Vehicular traffic loading and contact from cars, trucks and other heavy equipment that can move can put outside forces on natural gas piping and connections leading the mechanical damage and leaks.
Willful or malicious destruction of equipment does unfortunately happen.
Training, Support & Service Readiness Whenever They’re Called Upon
Faster Detection To Shorten Time On Scene, Supporting Safer Decisive Actions
SENSIT Solutions For Fire & Emergency Responders
Our battery powered instruments can be activated quickly and are straight forward to use.