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Gas Detectors

GAOTek gas detectors are compact, lightweight, and easy to carry devices that can be used in inspection and detection of gas leaks in industrial and commercial settings and are for sale in the United States, Canada and globally. These devices are useful in detection of toxic gases and they are also used in control systems as alarms to alert the operators in case of leaks in the area.

Our gas detectors consist of powerful features like advanced signal processing, an efficient microprocessor, high or low leak sensitivity selector, semiconductor gas sensor, dual flexible stainless probe, reference leak sources, ambient concentration reset, adjustable alarm limits, max hold function,  backlit LCD for reading even in dim light conditions,  auto temperature compensation, auto calibration in clean air. Recommend removing non “powerful features” such as Low battery indication, that would be expected and also recommend removing features are specific to anyone gas as this is a more general page now.

If you have any questions about our industrial and commercial grade gas detectors or would like a price quote on any of our gas detectors please feel free to contact one of our product experts who would be more than happy to assist you.  Click Here to contact an Expert.


GAOTek’s gas detector are battery operated devices for safety and portability purposes. These devices are manufactured as a fixed device and used in indicating the concentration of gases through indicators like alarms or signals. The old standard gas detector can only detect one gas while the latest multi-functional gas detectors can identify several gases at same time. Gas detectors can measure and detect the amount of specific concentrated gases in the air with the use of different technologies.

Gas detectors are classified into two types depending on the type of gas they can detect: combustible or toxic. Furthermore, classification filters down into catalytic and infrared sensors that can detect toxic gases.

Electro chemical sensors are used for detection of toxic gases like chlorine, nitrogen oxide, fluorine, phosphine, stibnite, and carbon monoxide. Gas is detected with the help of electrode signal functioning and these sensors are very sensitive. They send warning signals via electric currents.

Metal oxide semiconductors are used for detection of toxic gases. These devices use gas sensitive film that are composed of tungsten or tin oxides. These devices can operate in low humidity conditions and can also detect a range of toxic gases. If any toxic gas is present around then this film triggers and reacts to the gases.

Infrared sensors work through a system of transmitters and receivers to detect combustible gases. The transmitters act a light source and light detectors as the receivers.  When a gas is present in the area, the power of light transmission between the transmitter and receiver interrupts the gas

Catalytic sensors are used to detect combustible gases via catalytic oxidation. These sensors generally have platinum wire coils. When a combustible gas is exposed a catalytic surface, it gets oxidized and the heat released changes the wiring resistance.

Holographic sensors use light reflection to identify the changes in the polymer film. This film includes a hologram that reflects light at certain wavelength. When a gas is detected, it omits reflection because of change in composition.

Ultrasonic sensors are equipped with acoustic sensors that can easily detect change in noise in its surrounding environment. These sensors can identify changes in background noise by a sound generated by high pressure gas leaks. These sensors can easily differentiate the frequencies from background acoustic noise, and trigger the ultrasonic gas alarm if there is a deviation from normal condition of background noise.

The process of photoionization involves an ionized chemical from a high photon energy UV lamp. When a compound is bombarded with high energy photons from a UV lamp, an electron is ejected. The resulting current is directly proportional to the concentration of the compound. Standard components of air or mineral acids are ignored. The main advantages of this process are simplicity and high sensitivity.


GAOTek gas detectors are reliable, accurate, and easy to use devices. Some of the Key features include:

Portability as it makes them suitable for working in aloft and complex conditions

Advanced digital signal processing: with microprocessor control

Multi-color visual display

High-low leak sensitivity selector

Low battery indication

Semiconductor gas sensor

Flexible stainless probe

Ambient concentration reset

Back LCD for reading in dim light conditions.

Carbon monoxide testing density

Two-level carbon alarm

Auto calibration

Dual display for CO and temperatures

Max hold function

Replaceable CO sensor for longer use life


Gas detectors are mainly used to ensure safety in personal, industrial, or commercial areas. These devices have a wide range application usage in as industrial plants, pharmaceutical manufacturing, refineries, paper mills, shipyard, aircraft building facilities, wastewater treatment facilities, and air quality testing. Activities at danger of exposure to toxic gases include painting, fuel filling, contamination inspection, and construction to name a few.

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