All About Refrigerant Gas Leak Detector

Gas Leak Detector

Refrigerant Gas Leak Detector: Early Detection for HVAC

Detect refrigerant gas leaks early with this HVAC device!

Some technicians despise being called in for refrigerant leak detection jobs. They believe it's always a difficult and time-consuming task. It may be true. But, they should assess whether it's simply time-consuming and frustrating due to a lack of the necessary skills and knowledge. You will get the work done faster than you think if you bring along some items from your trusty kit. Professionals usually use pressurized gases in pipes and storage tanks in industrial and commercial settings. A pipeline transports liquid or natural gas from a storage tank to a furnace. In a cooling system, there are a variety of refrigerant gas leak detection. A refrigerant or gas leak detector is a type of equipment that detects minor leaks in a closed gas system.

We're talking about refrigerant leak detectors when we say "the right tools" and "particular products." These instruments detect infrared light, which appears odd until you learn that refrigerants absorb it. As you pass the detector via air, it will look for and chime when it detects refrigerant traces. These tools will make your task a lot easier.

In this article, we'll answer everything you need to know about refrigerant leak detectors.



Gas Leak Detection Tool


A refrigerant gas leak detector or freon gas leak detector detects refrigerant-freon gases in the environment.

Because these gases provide a risk of severe hypoxia, which can be fatal, many industrial layouts necessitate installing a refrigerant leak detection system.

The refrigerant gases in cold storage facilities or air-conditioned houses, hotels, and office buildings with HVAC systems are undetectable by humans (colourless, odourless). That's why refrigeration system detection is critical.


Because there are so many faulty connections, fittings, and welding spots in an HVAC system, refrigerant leakage is unavoidable. Many of the leaks are as small as 1 ounce per ten years and are not important to the system's operation. Leak detection for refrigerants can range from simple ways like listening to more complicated technologies like electronic leak detectors.

The extreme temperature, climate, and motion that cause some joints to leak may induce others to reveal more. If you don't address these issues, the heating or cooling system will suffer.


Personal gas detectors and leak detectors are linked. However, it has different uses. The leak detector detects the presence of gas in the environment, whereas the personal gas detector detects the presence of gas in the background.

In addition to sensors, we frequently use leak detectors to detect leaks in pipelines. Operators can, for example, track leaks along pipeline routes using flexible probes. These probes are often only a few centimetres away from the measurement equipment and can readily be put into difficult-to-reach places.

You can also adjust the sensitivity of most leak detectors. The leak detector will sound an alarm if it detects indicators of a gas leak. Many sensors lack monitors that show concentration levels. To locate the leak's location, reduce the sensitivity of the device. Then, adjust the sensitivity of the device until the alert sounds again. It shows the area of increased concentration and the path of leakage.


Precision Gas Leak Checker



Heating Diode

The diode provides heat when a halogenated gas, such as freon comes into contact with the heated ceramic diode in an HVAC refrigerant leak detector. It generates a low current. The current then triggers the alarm.

R-134a refrigerant can identify leaks of roughly 0.1 ounces every year. The heated diode sensor has an extremely high sensitivity. Furthermore, they exclusively react with halogenated gases, reducing the risk of false positives due to the presence of other gases.

Moisture and oil contamination can affect heated diode sensors. The sensor is inexpensive to replace. However, it has a short lifespan of about 2-3 years.


Semi-conductor sensors use metal oxides (typically tin oxide or alumina) produced on pearl sensors. Use the heating element to maintain the sensor's optimal temperature for gas detection.

A pair of offset electrodes are placed in the semiconductor sensor to detect changes in conductivity, locate leaks, and quantify variations in conductivity. When the sensor comes into touch with the escaping gas, it adsorbs the gas on the sensor's surface, causing the sensor's resistance to alter. The sensor returns to its original state once it releases the gas.

Because semiconductor sensors give strong signals at high gas concentrations, they effectively detect gas leaks. It makes directing the detector to the most concentrated region, the leak, much easier.

Semiconductor sensors are extremely adaptable. It can detect low and high gas concentrations and a variety of gases by altering the sensor's material, construction, and operating temperature.

Solid-state sensors have a long service life, which is their main advantage. Sensors can endure up to ten years in clean conditions, far longer than other sensors, for devices only utilized for a short period (unless there are several gas leaks!). It's a significant benefit.

Background gas interference affects solid-state sensors more than other types of sensors. The solid-state sensor sets out an error alarm in applications where background gas is present. It can remove these background gases in some circumstances to reduce negative effects.


Ultrasonic leak detectors work on a completely different concept than different leak detectors. The ultrasonic leak detector identifies the leak's sound waves when the gases escape the time the solid-state sensors as well as the heated diode sensors look for evidence of certain gases that have gone.

It produces a sound from 25 kHz to 10 MHz as the gas escapes from the pressure line. This frequency is well above what the human ear can detect, yet it is well within the area that ultrasonic sensors may detect. When the detector detects ultrasonic frequencies, they're isolated from background noise, amplified, and transformed to human-audible frequencies.

Ultrasonic gas detectors seek sounds that leak rather than leaks to detect gas leakage. The gadget cannot assess the gas concentration, but it can calculate the escaping gas leakage rate since the ultrasonic level is dependent on the gas pressure and the extent of the leak.

Ultrasonic gas detectors can work in practically any environment, especially if they need to contact the gas leak immediately prior to reaching a stationary or heated diode sensor to recognize the leak. Outdoor surroundings can extract benefits from remote sensing.


Many objects, such as air conditioners and refrigerators, rely on refrigerants for cooling and good operation. As a result, it is critical to ensure that this refrigerant doesn't leak and escape. There are a variety of refrigerant gas leak detectors available that you can choose based on the following criteria:


The sensitivity of your refrigerant gas leak detector is vital to know because minor leaks demand high sensitivity leak detectors. Some versions have a rate of 0.25 oz/year, while others have a rating of 0.15 oz/year, with the lower being better.

Sensor Life

All of these refrigerant leak detectors rely on a sensor that has a finite lifespan before failing. With some models, the sensor life has 100 hours or 200 hours and a sensor life rating in years.


The majority of leak detectors in the industry are battery-operated for convenience of usage. As a result, verifying the compatible battery type and the battery life is critical, as you will need to replace or charge the battery whenever it runs out.

Supported Refrigerants

If you're familiar with refrigerants and cooling equipment like refrigerators and air conditioners, you're probably aware that you can use numerous gases as refrigerants. As a result, some refrigerant leaks may go undetected by a particular detector.

To solve this issue, you should invest in a refrigerant leak detector that can handle a wide range of refrigerants and accurately identifies them in the event of a leak. Fortunately, practically all refrigerant leak detectors include a list of supported refrigerants that you should inspect. It contains CFCs, HFCs, HCFCs, and other forms of refrigerants and their mixtures.



Reliable Gas Leak Sensor


Will a Carbon Monoxide Detector Detect a Gas Leak?

Carbon monoxide (CO) is a poisonous gas produced when you burn fuel in the absence of oxygen. Carbon monoxide and methane are different gases that cannot monitor with the same sensor. Although carbon monoxide may be present during a gas leak, a carbon monoxide detector is unlikely to detect natural gas. In the end, this detector will not be able to see a natural gas leak.

It is difficult to detect carbon monoxide with the human nose, although it's known to produce unconsciousness quickly. Natural gas is odourless by default, but gas companies add mercaptan to make it smell like sulphur or rotten eggs. Furthermore, you can usually use a hissing sound or visible damage to a gas line to detect natural gas leaks.

Failing to have a full gas detection system could have disastrous consequences. Carbon monoxide, in addition to natural gas's extreme flammability, can be lethal under some circumstances. You could be at risk of a sudden fire, explosion, or deadly gas if you don't get enough warning. Install a dependable gas detection system to detect unsafe carbon monoxide and methane levels in your home to safeguard the environment.

Where to Install Gas Leak Detector?

You've researched and found the best gas detectors for your needs. It's now time to put them in place. But how can you figure out where the sensors should go?

You already know that gas sensor placement depends on your facility's specifics. However, there are so many variables to consider. There are no hard-and-fast rules to follow. However, this essay will go over some best practices to keep in mind when installing your gas detectors.


  • Place sensors close to the source of the gas or leak.
  • Place sensors in regions where air currents are most likely to produce the maximum gas concentration, such as corners or the stopping points of gas-releasing moving devices.
  • Consider the vapour density of the monitored gas in comparison to air. Gas or vapour sensors are three or four times heavier compared to air air should be placed near the floor. To identify lighter-than-air gases, they should be located near the ceiling or roof.

The refrigerant-freon gas detector's installation position is important to its performance. This gas detector should be positioned 0.2 meters above floor level since HFC/HCFC is heavier than air.

Because it regulates the air in its vicinity, it should be placed as close to the suspected leak as feasible, considering the ventilation and air movement in the area.

According to the rule of thumb, a Refrigerant-Freon gas detector should cover around 50 m2 in an enclosed area with no obstructions.

Can Smoke Detector Detect Gas Leak?

It's crucial to understand that natural gas is not the same as smoke or carbon monoxide. While smoke and carbon monoxide detectors are significant for protecting your home and family, they won't detect a natural gas leak; a natural gas detector is required. Carbon monoxide detectors, on the other hand, can warn you if your appliances are burning natural gas incorrectly.

Recognizing the signs and symptoms of a natural gas leak can save your life if you use natural gas in your house. Because the scent of certain gases can be invisible, it's vital to learn everything you can about shielding yourself, your home, and your family from harmful natural gas leaks.


Pro Gas Leak Finder


Refrigerant Gas Leak Detector from HVAC Shop

There are a few uncommon circumstances where the refrigerant in your air conditioner or refrigerator leaks out, which can drastically reduce cooling performance. Checking for leaks with a refrigeration gas leak detector is critical to preventing such problems.

We have high-quality refrigerant gas leak detectors here at HVAC Shop! Don't hesitate to contact us today for all the HVAC equipment you need for your home or your A/C business.