Gas Detectors

GAOTek gas detectors are widely used in inspection and detection of gas leaks and emissions. They can detect the presence of toxic gasses. Gas detectors are also used in control systems as an alarm to alert the operators in case of toxic gas leaks in the area. GAOTek gas detectors are reliable, high quality, and affordable devices, known for their accurate detection ability and ease of inspection or monitoring. They are compact, easy to carry and portable, allowing the user to work conveniently in complex conditions. Our gas detectors offer powerful features such as advanced signal processing, visual display, an efficient microprocessor, high or low leak sensitivity selector, low battery indication, semiconductor gas sensor, flexible stainless probe, reference leak sources, ambient concentration reset, adjustable alarm limits, max hold function, replaceable CO sensor, dual display for CO and temperature, backlit LCD for reading even in dim light conditions, oxygen density testing, auto temperature compensation, auto calibration in clean air, carbon monoxide testing density, and two-level carbon monoxide alarm.

Technologies

Gas detectors measure and detect the amount of specific concentrated gases in the air with the use of different technologies.

Our gas detectors are battery operated for safety and portability. They are manufactured as stationary devices and find use in signifying the concentration of gases through indicators like alarms or signals. The older standard gas detectors are made originally to detect one gas, while the modern multi-function gas detectors are capable of detecting several gases at the same time.

Gas detectors are categorized by the type of gas they detect - combustible or toxic. Further categorization narrows them down to catalytic and infrared sensors which detect toxic gasses such as electrochemical and metal oxide semiconductor technologies.

Electro chemical sensors are used for detection of toxic gasses such as chlorine, nitrogen oxide, fluorine, phosphine, stibine, and carbon monoxide. Gas is detected through electrode signal functioning. These sensors are highly sensitive. They send warning signals via electric currents.

Metal oxide semiconductors are used for detecting toxic gases. They use a gas sensitive film which composes tungsten or tin oxides. Metal oxide semiconductors are generally efficient due to their ability to operate in low humidity conditions while being able to detect a range of toxic gases. The film reacts to the gases and triggers the device if a toxic gas is present.

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

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

Holographic sensors use light reflection to detect changes in a polymer film. The film contains a hologram which reflects light at a certain wavelength. When it detects a gas, it gives out a reflection due to change in composition.

Ultrasonic sensors use an acoustic sensor to detect changes in noise in its environment. They detect changes in background noise by a sound generated by high pressure gas leaks. These sensors are easily able to distinguish the frequencies from background acoustic noise, and trigger the ultrasonic gas alarm if there is a deviation from normal condition of background noise.

Photoionization uses 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. Simplicity and high sensitivity are a couple of advantages of photoionization.

 

Features

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

Portability which 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

Applications

Gas detectors are commonly used to ensure safety in personal, industrial, or commercial areas. They are used in a wide range of applications such 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, construction to name a few.

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