We design, supply, install and maintain fixed gas leak detection systems for commercial and industrial sites across Ireland. A commercial gas leak detector system watches for gas around the clock, raises the alarm and can shut off the supply automatically. This page is for facilities, maintenance and safety teams, not for household spray tests or plug-in alarms.
A gas leak detection system is a fixed installation made up of four parts working together:
Most commercial sites in Ireland run on natural gas or LPG, and the system is set up for the fuel you use. Natural gas is mostly methane. Gas Networks Ireland describes it as lighter than air, so it rises when released. LPG is the opposite. The Health and Safety Authority notes that LPG is heavier than air, drops to the ground and can collect in drains or basements.
That difference decides where sensors go. A natural gas sensor is mounted high, near the ceiling. An LPG sensor is mounted low, near the floor. A sensor at the wrong height can miss a leak entirely, which is why we confirm the gas and the mounting height during the site survey.
Beyond fuel gases, we supply detection for toxic gases, oxygen depletion and enrichment, asphyxiants and refrigerants. Many kitchen and plant room systems also monitor carbon monoxide.
Raising an alarm is only half the job. If nobody is there to act, or the leak is large, the gas needs to stop. The control panel can be wired to a normally closed gas solenoid shut-off valve on the incoming supply. When gas is detected above the set level, the panel cuts power to the valve and it closes, isolating the supply.
Once the cause has been found and dealt with, a trained person resets the system and gas is restored. We train your staff on how to do this at handover. Panels such as the Medem AGDS 2EM combine detection and automatic valve control in one unit.
A handheld gas leak detector is a portable tool an engineer carries to find the exact point of a leak, or to check a space before entry. It only works when someone is holding it.
A fixed system is permanently installed and monitors continuously, day and night, whether the building is occupied or not. For a commercial kitchen, boiler room, plant room or lab, a fixed system is what protects the site. Many sites use both: a fixed system for continuous protection and a portable detector for maintenance staff. See our range of fixed gas detectors.
We install gas leak detection across hotels and restaurant kitchens, schools and universities, hospitals, pharmaceutical and chemical plants, manufacturing sites, scientific research facilities, high street outlets and government sites. Smaller sites often need one or two sensors, which a panel such as the GDS404+ handles. Larger sites may need multipoint panels with many sensors across several rooms.
In kitchens, labs and boiler rooms, gas detection is often combined with a gas interlock system that also checks ventilation is running before gas can flow.
Follow your site emergency procedure. Do not operate electrical switches or use naked flames, get people out to fresh air and call the emergency services. Once the area is safe, have the system checked and the cause found before gas is restored.
A system is set up for the gas or gases present on your site. Because natural gas rises and LPG sinks, each needs its own sensor at the right height. We confirm the gases and sensor positions during the site survey.
Yes. We supply, install and commission the whole system, including detectors, control panel, alarms and the gas shut-off valve, and we train your staff at handover.
Yes. Sensors drift over time and need regular calibration with certified test gas to stay accurate. We offer maintenance contracts and one-off service visits, and we service equipment from many manufacturers.
In most cases, yes. We survey the site, agree sensor positions and valve location, and fit the system around your existing installation.
Tell us about your site and the gas you use, and we will recommend sensors, alarms and shut-off to suit. Call 01 289 7720 or email info@vistec.ie.
© 2026 Vistec Gas Detection Ltd
Descriptions
