Because the sensor must come into contact with the gas to detect it, semiconductor sensors operate at a shorter distance than infrared or ultrasonic spot detectors. In addition, gas detection helps control oxygen consumption in underground terrain, as reduced oxygen levels can cause dizziness in workers and possibly fainting. In addition, a gas detector can sound the evacuation warning or alarm to operators in the area where the leak occurs, giving them time to leave the premises.
Although considered virtually non-toxic to humans, flammable gases are present in a wide range of conditions in forms such as raw materials for industrial use, fuels, propellants and welding materials. To prevent the possibility of fires or explosions, or to stop leaks, install proper ventilation and remove gas. The use of the GASTEC flammable gas detector verifies the presence and concentrations of flammable gases.
A typical human nose has 400 types of scent receptors that allow us to smell about 1 trillion different scents. But still many of us don’t have the ability to identify the type or concentration of gas in our atmosphere. There are several gas sensors to detect gases such as oxygen, carbon dioxide, nitrogen, methane, etc. They are also commonly found in devices used to detect harmful gas leakage, monitor air quality in industries and offices, etc. The GASTEC flammable gas detector is a small, lightweight and portable device for detecting the presence of flammable gas. It uses an optimized combustion-type contact sensor that allows flammable gas to be detected and measured to protect against the possibility of explosion.
The resistance of tin dioxide is usually about 50 kΩ in air, but can drop to about 3.5 kΩ in the presence of 1% methane. Semiconductor sensors are often used to detect hydrogen, oxygen, alcohol vapor, and harmful gases such as carbon monoxide. One of the most common applications of semiconductor sensors is in carbon monoxide sensors.
Gas monitors and alarms for carbon monoxide and other harmful gases are increasingly available for home and office use and are becoming mandatory by law in some jurisdictions. Catalytic gas detectors are usually used to measure flammable gases that present a risk of explosion when concentrations are between the lower explosion limit and the upper explosion limit. Gas catalytic detectors are based on the principle that when the gas oxidizes, laser gas detector it produces heat and the sensor will convert the temperature change via a Wheatstone bridge-like circuit. Of all sensor technologies, the electrochemical sensor is the most widespread and is mainly used for the detection of toxic gases and solid oxygen gases. Unlike the previous two technologies, the gas discriminates relatively well, but is still very sensitive to interference that can significantly interfere with the measurement.
Its use in cars was initially for the control of engine emissions, but now gas sensors can also be used to ensure the comfort and safety of the passengers. Carbon dioxide sensors are installed in buildings as part of demand-driven ventilation systems. Advanced gas sensor systems are being researched for use in medical diagnostics, monitoring and treatment systems, far beyond their initial use in operating rooms.
The portable NO2 gas detector is specially used to detect NO2 content in the environment. Its main function is to monitor the concentration of NO2 in the air around the user at all times. As soon as the NO2 concentration reaches a certain value, it automatically activates the triple alarm, flash and vibration of the gas detector. The measuring range of renke NO2 gas detector is 0~20ppm and 0~2000ppm optional. Solid type gas detectors can be used to detect one or more types of gas. Fixed-type detectors are usually mounted near the process area of a factory or control room, or an area to be protected, such as a living room.