Gas detectors are safety instruments which are used to detect and monitor levels of gas in the atmosphere. Various different gases can be checked, typically they are either toxic, combustible, or flammable and present a threat to human safety or life. Detectors can be portable or fixed in one position (stationary). A portable gas detector is for protection of personnel and monitors the air in the surrounding atmosphere, a stationary detector is normally fixed to a wall or in a panel and is electrically powered. Applications include construction, fire and rescue, petroleum refineries, sewage treatment, mining, paper mills and tanneries.

Gas detectors are calibrated and set up in scientific labs to make sure that they are accurate and reliable.

The following are the top 5 gas detectors currently available on

Starting with #5…


#5 BW Clip BWC2-M Single Gas CO Monitor


The BWC2-M BW clip is a monitor for the detection of carbon monoxide. Carbon monoxide is a silent killer particularly in the home and industrial environments and the BWC2-M BW clip is a single gas detectector specifically designed to monitor CO.

This device will monitor and log the last 35 gas detection events and can be used in conjunction with the intelidox instrument management systems and MicroDose III as well as being compatible with fleet manager II software and microdock II docking station.

It is accurate and keeps a record without anything more than switching it on and letting it do its stuff, automatic self-testing ensures that safety is always maintained at the highest level.

The detector provides cover for two years completely maintenance and service-free to keep hazardous environments safe and protect personnel.

This is a small, compact meter measuring only 5 inches x 3 inches (125 x 25mm approx) and weighing under 5 ounces (136 grams).

Honeywell is an internationally trusted and respected brand and you can be 100% sure that this product will meet or exceed its specification.


#5 = BW Technologies GAXT-X-DL-2 GasAlert Extreme Oxygen (O2) Single Gas Detector – NOW OBSOLETE

First up we recommend the GasAlert Extreme oxygen detector, a single gas detector for measuring oxygen levels. There’s a low level alarm set at 19.5% by volume of oxygen and high level at 22.5% but these levels can be adjusted. BW Technologies are renowned for some of the best safety instruments on the market – high in durability, reliability and accuracy. Perfect for use in the mining and construction industries as well as for the emergency services and other potentially dangerous settings such as confined spaces. The strong and robust casing is water resistant and will stand up to the most taxing of circumstances. The meter’s reliabilty is maintained by regular self-testing and it is designed to give effective and reliable performance even in extremely harsh environments. Data logging and management facilities are available – as well as a loud 95 decibel alarm, visual and vibration alerts – the meter records alarm events and can transmit them via a USB datalink.

Note: Although this product has been discontinued, BW Technologies are still making excellent gas detection equipment and you can check out some of them currently on sale using the link below

#4 – MSA (Mine Safety Appliances Co) 10107602 Altair 4X Portable Multi-Gas Analyzer


Nobody can put a price on safety so if that is your priority then you should consider the MSA (Mine Safety Appliances Co) 10107602 Altair 4X Portable Multi-Gas Analyzer. This detector is a bit more expensive but if you are looking for a high-end meter at a reasonable cost this is the one for you. The MSA 10107602 Altair 4X can display the readings for up to four different gases with a wide range of XCell(R) sensors including Carbon Dioxide (CO2), Flammable gas (LEL), Carbon Monoxide (CO) Sulphur Dioxide (S02) and Hydrogen Sulphide (H2S) with Motion Alert system. The unit is protected from RF interference by its digital sensor output.

The MSA Altair 4X can be used in the harshest of environments and is suitable for many industries such as petrochemical, marine, nuclear pulp and paper, fire fighting, refining, steel, chemical, construction, defence, electricity, welding, brewing and food. It is engineered to be extremely rugged and hard to break and can survive being dropped fron heights of up to 20 ft (6m).

Comparison with Industry averages:
Altair 4X has a four-year sensor life which is 60% longer than the industry average
Run time is 24 hours – exceeding the industry average by 71%.
The Altair 4X uses less than half the amount of calibration gas than the industry average.
Exclusive MotionAlert™ feature to alert that the user is immobile
Exclusive InstantAlert™ – manual alarm that warns of danger.

These monitors are very portable and lightweight, weighing in at only 1 pound and measuring just 14 x 6 x 3 inches (350 x 150 x 75mm)
Lithium Polymer battery included


#3 – Fixed Gas Detector, C3H8, CH4


Next we have selected the Safe T Alert fixed propane gas and natural gas detector, a must-have appliance if you cook or heat your home using propane gas or natural gas. Both Propane gas and natural gas can result in fires or explosions if they leak and are exposed to a source of ignition. The 40-411-P can be mounted in most locations and is fixed near the floor – where heavier propane gas will gather in the event of a leak – using either screws or velcro. An alarm should be fitted near to every appliance that uses gas, also consideration should be given if you live near a waste disposal area or pit as these produce natural gas which can find their way into your house. The unit comes with a decent length of electrical cord and plugs right into a 120V AC mains supply outlet.


#2 – Bacharach Leakator Jr 0019-7075 ABS Plastic Combustible Gas Leak Detector


Runner-up in this section is the Bacharach Leakator Jr, a combustible gas leak detector. This tool is brilliant if you are working in the plumbing industry or other related jobs like HVAC installation or maintenance but is also perfect for the gas industry – inspecting valves, meters and regulators and surveying pipelines, as well as the general building trade and construction industries. The detector easily pinpoints even small gas leaks without any calibration being required so it is very low maintenance. The unit itself is only 6 inches long and has a flexible probe which extends a further 12 inches. It has a loud warning sound on gas detection and two levels of sensitivity, for finding the approximate area then spotting the exact location of the leak. Not only can this product protect you from a costly insurance claim, it can save the lives of you and your customers.

#1 Y201 Propane and Natural Gas Leak Detector; Portable Gas Sniffer to Locate Gas Leaks of Combustible Gases


Our top pick in the Gas Detectors category is the Yeezou Y201 which is an essential piece of kit for locating any kind of dangerous explosive gas. Some of the gases that the Y201 can locate include propane, butane, kerosene gasoline, ethane, coal gas and sewer gas. This is a serious piece of kit that can save lives as well as save money by finding the source of leaks so that they can be fixed.

It can cost into the hundreds of dollars to call out a technician to find your leak, save yourself the money –  use this kit just once and it will more than pay for itself. Easy to use by just running the sniffer along pipework, tanks or your car to detect the leak. You cas also lose hundreds of dollars worth of gas if you have a leak, not to mention that it could be lethal for you and your family. Th Y201 sniffer will find the gas, save you money and potentially save your life.

Another point that you should consider is that gas does not always have an odour so you could have a leak without knowing it. If your gas bill has risen unexpectedly without you using more gas you may have a leak and you should get it checked. It will be cheaper for you to buy one of these detectors and check it out yourself than pay for somebody else to do it. You can also check out your friends, family and neighbors properties while you’re at it!

The Y201 detector is extremely light and portable and can be taken anywhere both indoors or outdoors to detect leaks. The sniffer is highly flexible as it has a 12 inch head that can be bent into any confined space; hole, pipe tank or under floorboards, anywhere that gas can be found to have leaked. Sensitivity of the sniffer can be varied to filter out false alarms from very small quantities of gas that could trigger a false alarm. Conversely the sensitivity can be increased to detect small quantities of leakes gases.

The alarm is both audio (variable tone alarm, maximum volume of 85dB) and visual with 6 LEDs. On detection of flammable gas an alarm sounds and the LED display indicates gas is present.

Also detects relative concentrations of the following combustible gases: methane, LPG, LNG and toluene as well as other flammable explosive gases.

This product has a big thumbs up in Amazon with nearly 3000 ratings and a score of 4.4 out of 5 stars

Power Source Battery
Alarm type: Audible & Visual
Alarm Range: 0.1%-40% LEL
Maximum Sensitivity: 50 ppm
Item Dimensions: 5.9 x 2.7 x 1 inches

The package comes with an exceptional lifetime guarantee – if the sniffer breaks at any time, the supplier will replace it free of charge. Support is also available through their chemist who is retained on-staff.

The full contents of the package are: Gas Leak Sniffer in a quality protective nylon bag and 20 page instruction manual with important advice on gas & air quality hazards.



#1 – BW Technologies GA24XT-H GasAlertClip Extreme 2-Year Detector – NOW OBSOLETE


Our top performing Gas detector, the BW Technologies GA24XT-H GasAlertClip is now obsolete. As with all products in the industry, technology is constantly improving and evolving and the GA24XT-H has now been withdrawn from the market. On the positive side BW Technologies provide a full range of products and you will be able to find a suitable replacement easily using the link below:

Find Gas Detectors by BW Industries

Review of BW Technologies GA24XT-H GasAlertClip Extreme 2-Year Detector:
The best gas detector we found for all round performance and value was the BW Technologies GA24XT-H GasAlertClip Extreme 2-Year Detector. It is a handheld detector used to monitor levels of hydrogen sulfide (H2S) in the atmosphere and can operate continuously without recharging, battery replacement or recalibration for up to two years. There is a triple layer of warning alert with audio, visual and vibration alarms all operating on high (or low) gas level. The user-adjustable LCD screen clearly shows all the information you need; alarm set-points, alarm level, detector life remaining and maximum exposure among others. This meter is an essential piece of safety kit in a wide range of applications – petroleum refineries, sewage treatment plants, paper mills and tanneries to name a few. The detector can output its results to a printer or computer and has a belt clip on the back for hands-free operation.