Warns before exposure
It reports a rising concentration while the answer is still ventilation.
detection
Fixed Gas Detection Systems
Know a concentration is rising while it is still a ventilation problem — fixed toxic and combustible gas detection for plants, labs, utilities and hazardous areas.
Overview
What Is Fixed Gas Detection?
Gas hazards are difficult because human senses are unreliable against them. Carbon monoxide has no smell at all. Hydrogen sulphide has a strong one at low concentration and then deadens the sense of smell at exactly the levels that are dangerous.
A fixed installation puts sensors where each gas will actually collect and a controller that monitors, logs and acts on them. Placement is not a formality: hydrogen and methane rise, chlorine and many solvent vapours pool low, and the room's ventilation moves all of them in ways specific to that building. A sensor in the wrong place is not reduced protection — it is none.
- Sensors chosen per gas Catalytic, infrared, electrochemical and PID technologies, matched to the hazard.
- Placement follows behaviour Worked out from gas density and the room's real airflow, not a grid.
- Controllers trend, not just alarm Levels are logged so a slow rise is visible before it reaches a threshold.
- A staged response Ventilation first, then alarm, then isolation or shutdown as the level climbs.
Operation
How Fixed Gas Detection Works
01
Sense
Fixed detectors monitor the atmosphere continuously at the points that matter.
02
Measure and trend
The controller logs concentration so a rising level is visible early.
03
Stage the response
Low thresholds start ventilation; higher ones raise alarms.
04
Isolate or shut down
At the action level the system drives interlocks, isolation or plant shutdown.
Benefits
Why Choose Fixed Gas Detection?
Trending, not just alarms
Logged levels show a developing problem instead of only a threshold breach.
Right sensor per gas
Technology is selected for the hazard rather than one unit used throughout.
Placement by behaviour
Sensors sit where that gas will actually collect in that room.
Drives plant response
Interlocks to ventilation, isolation and shutdown rather than a horn alone.
Maintained, not just installed
Bump testing, calibration and sensor replacement scheduled under AMC.
Applications
Applications Across Critical Environments
Fixed gas detection is usually the specific control a safety audit or statutory inspection asks you to demonstrate.
Process and chemical plant
Solvent handling, reactors and areas with a flammable inventory.
Industry detailOil, gas and fuel facilities
Storage, decanting and process areas with hydrocarbon risk.
Industry detailLaboratories and pharma
Solvent stores, fume handling and specialty gas supply.
Industry detailUtilities and power
Battery rooms, gas-fired plant and confined service spaces.
Industry detailCold stores and refrigeration
Ammonia and refrigerant plant rooms.
Industry detailWorkshops and vehicle bays
Carbon monoxide from running engines in enclosed spaces.
Industry detailAlso used in water treatment, waste handling, car parks and confined service spaces. Which gases to monitor, and where, comes out of the risk review rather than a standard list.
Configuration
Inside a Fixed Gas Detection System
- Fixed detector heads selected per gas and rated for the area classification.
- Controller or addressable panel which monitors, logs and drives the staged response.
- Audible and visual alarms positioned so the warning reaches the people at risk.
- Interlocks and outputs to ventilation, isolation valves, plant shutdown and the fire system.
- Calibration and test provision so bump testing and calibration can be carried out in service.
- Design, commissioning and maintenance including placement study and calibration under AMC.
Products
Products We Supply
The gas detection range we are an authorised partner for.
Our services
End-to-End Gas Detection Solutions
- Site assessment and risk review walking the actual space before anything is specified.
- System selection and application engineering matching the technology to the environment and the risk.
- Sensor placement study and gas selection so the coverage you pay for is the coverage you get.
- Integration with existing fire alarm systems including the cause-and-effect for any linked response.
- Installation, testing and commissioning with the installed system proven on handover.
- Preventive maintenance and technical support under AMC, with a documented service record.
Compliance
System Integration and Compliance
Standards and approvals
Fixed gas detection in classified areas is designed around the hazardous-area framework of the IS/IEC 60079 series together with the occupational exposure limits applicable to your process.
Where it forms part of the building's fire protection it also sits within NBC 2016 Part 4. It is commonly the specific control a safety audit or statutory inspection asks you to evidence.
We confirm detector approvals and area classification suitability against the certification held by the specific model proposed, and against your consultant's specification.
FAQ
Frequently Asked Questions
What facility and safety teams usually ask about gas detection.
Still have a question?
Speak directly with one of our fire safety engineers.
Call +91 88795 33000What is a fixed gas detection system?
Permanently installed detectors and a controller that monitor the atmosphere continuously, log concentration and drive a staged response as levels rise.
Why not rely on portable detectors?
Portables protect the person carrying them, at the moment they are carrying them. A fixed system watches the space continuously, including when nobody is there.
Where do the sensors go?
Where that gas will actually collect. Light gases rise, heavy ones pool low, and ventilation moves both. Placement comes from a study of the room, not a grid.
How often does it need calibration?
Intervals depend on the sensor technology and the environment. Bump testing and calibration are scheduled under AMC, with a documented record.
Can it start ventilation automatically?
Yes. A staged response normally starts extraction at a low threshold, alarms as the level climbs, and drives isolation or shutdown at the action level.
Does it integrate with the fire alarm?
It can, where the project design calls for it. We commission the interface and prove the cause-and-effect as one sequence.
What do you need to quote a project?
The gases involved, the process and area classification, a layout with ventilation details, and whether it is a new installation or an upgrade.
Engineered to your hazard class
Protect People and Plant with Fixed Gas Detection
Talk to our team about a gas detection solution matched to your gases, your area classification and your shutdown philosophy.