The commercial kitchen environment is very fast-paced and chaotic, with everybody preparing meals using different types of equipment. All the equipment uses LPG gas fuel to cook the ordered meals. Here, both time, the appearance of the meal, and maintaining the same mouth-watering taste are very critical to please the customers. Nobody has the time to look at the minute errors that can cause hazardous conditions later. This is why installing a reliable gas leak detector is highly essential for commercial kitchens. And a simple beeping device will not suffice; instead, a proper monitoring and detection setup with the right sensor technology is needed for enhanced safety. This blog reveals the best gas leak sensors for commercial kitchens, their features, working, types, and which one you should choose.
What is a Gas Leak Sensor?
A gas leak sensor is used as a fire detection system to continuously monitor the air for combustible and hazardous gases to detect the leak and activate alarms along with suppressive measures. Gases that can ignite a fire hazard when leaked are LPG, methane, propane, and carbon monoxide. The leak sensor device is programmed to analyze and detect the concentration of gas in the indoor environment and activates the loud audible alarm along with an alert on the owner’s personal device. Early detection and immediate response can prevent uncontrollable fire, explosion, and poisoning.
Different Types of Gas Leak Sensors to Choose From
Gas leak sensors are categorized based on their sensor technology, which matters more than the buyers realize. Choosing the right sensor with the right technology is highly critical for accurate detection and suppressive measures. Here are the different types of gas leak sensors reliable for a commercial kitchen environment:
Semiconductor Sensors
These types of gas leak sensors detect leaks by measuring a change in electrical resistance. They are a very popular option for commercial kitchens for their ability to detect different types of gases, accuracy, and cost-effectiveness. However, the cooking fumes and steam produced when cooking food items can disrupt their detection accuracy.
Catalytic Sensors
Catalytic sensors work by detecting the change in heat produced during the combustion. These sensors are most commonly used in industrial spaces like a chemical factory, but require the presence of oxygen to function properly, which is why they are not installed in enclosed spaces with a lower concentration of oxygen.
Infrared or IR Sensors
Infrared sensors are advanced gas leak detectors used for harsh industrial environments. They detect the presence of a gas leak by measuring how it absorbs the infrared light. These detectors have a durable design to function optimally in harsh conditions.
Ultrasonic Gas Leak Detectors
These types of gas leak detectors sense the presence of high-pressure gas leaks by listening to it instead of measuring the concentration. These devices offer great protection by detecting the leakage early, even before the gas reaches the sensor, but cannot identify the gas type.
Physical Coverage Range of Gas Leak Sensors
Indoor Point Detectors
These types of gas leak detectors have a protection range between 6 and 7.5 meters. For higher accuracy and detection efficiency, the sensors must be installed within a meter of leakage points.
Industrial & Open-Path Sensors
Industrial-grade gas leak sensors have a higher protection radius and are considered ideal for places like warehouses and oil rigs. Open-path infrared detectors have a detection range between 5 and 200 meters, whereas the ultrasonic gas leak detectors are designed to listen to high-pressure gas leaks with a coverage radius of 20 to 28 meters.
How Do Gas Leak Sensors Work?
Here are the major steps to understand the working of gas leak sensors:
Continuously Monitors Air: These sensors sample the surrounding air constantly to detect the presence of gas.
Detects Gas: Based on the sensing technology, the sensor detects the presence of gas and activates the alerts.
Measures Gas Concentration: The sensor measures the concentration of the gas into a readable figure.
Compare it with Safety Limits: The sensor compares the reading with its fed data of gas concentration threshold limits.
Triggers Alarm: When the compared reading surpasses the threshold limit, the sensor activates the alarm.
Activates Safety Systems: After the sensor sends the signal to the main control panel, it activates the alarms along with suppressive mechanisms, triggering ventilation systems and cutting off the gas supply.
Sensors With Two-Stage Alerts: Commercial sensors have a two-stage alert mechanism, which activates the first time at about the gas leak around 25% LEL concentration and second time at 50% LEL.
Where Do Gas Leak Sensors Be Placed in Commercial Kitchens?
| Gas / Monitoring Type | Recommended Sensor Placement | Reason |
| LPG (Liquefied Petroleum Gas) | Near the floor, close to gas cylinders or appliances | LPG is heavier than air and settles at low levels. |
| Natural Gas / Methane | Near the ceiling, above gas appliances | These gases are lighter than air and rise upward. |
| Carbon Monoxide (CO) | Around breathing height (about 1.5 m from the floor) | Detects gas where people are most likely to inhale it. |
| Near Extraction Hood | Avoid installing sensors here | Heat, grease, and fumes can cause false readings and block the sensor. |
| Large Commercial Kitchens | Install multiple sensors across different cooking areas | One sensor is usually not enough to provide complete coverage. |
| General Installation Tip | Match the sensor location to the type of gas being monitored | Incorrect placement can delay or prevent leak detection. |
Gas Leak Sensor Buying Checklist for Commercial Kitchens
Detects Both Gas and CO: Choose a sensor that can detect both combustible gases and carbon monoxide.
Right Sensor Type: There are various types of gas leak sensors available like semiconductor sensors and IR sensors. Make sure to choose the right type based on your needs.
Install at the Correct Height: LPG sensors should be placed near the floor and methane sensors should be installed near the ceiling, whereas the CO sensors should be mounted on the walls at average human height.
Easy to Integrate: Choose the sensors that can be easily integrated with shut off valves and alarm systems.
Choose Two-Stage Alarm Sensors: Advanced sensors provide an early warning followed by a critical alarm for better safety.
