What are the most common types of gas warning devices?
The principles of gas detectors can be divided into: diffusion type and pump suction type. The so-called diffusion type means that the probe is placed in the dangerous zone of the gas detection, and the gas to be measured diffuses into the probe from the space, while the alarm is placed in the monitoring room to provide instructions and alarms. The pump suction type uses a pump to suck the gas to be measured into the detection probe. The suction pump is set together with the built-in gas detector. The detector is placed at a dangerous location of the gas to be measured to detect execution instructions and alarm functions.
According to the type of gas detected, it can be divided into: toxic gas detector and combustible gas detector;
Detectors that respond to single or multiple combustible gas concentrations. The intelligent sensor transmitter used in the detector is the most complete combustible gas sensor transmitter. Among them, infrared combustible gas detectors are ideal choices in the following application environments: frequent exposure to catalytic poisonous gases, frequent emissions of highly flammable gases, oxygen-deficient environments, and environments where detection is difficult to achieve.
According to the detection method, it can be divided into: natural diffusion gas detector and pump suction gas detector;
Diffusion gas detector: The gas in the detected area slowly flows into the instrument with the free flow of air for detection, and it needs to be placed on site. This method is affected by the detection environment, such as ambient temperature, wind speed, etc., and is not suitable for air sources with low pressure. The advantage of diffusion gas detectors is that they cost less than pump-type gas detectors.
Pump-type gas detector: The instrument is equipped with a gas sampling pump. Its working method is that the power supply drives the gas sampling pump to pump and sample the gas in the area to be measured, and then the sample gas is sent to the instrument for detection. The pump-type gas detector is characterized by fast detection speed, long-distance measurement in dangerous areas, and maintenance of personnel safety. It is suitable for occasions where the gas detector cannot be placed on site, and where there are special requirements for response speed, pressure difference, etc.
According to the number of detections, it can be divided into: single gas detector and all-in-one gas detector.
Single gas detector: Using high-performance catalytic combustion sensors, it can be used in petrochemical, environmental accident, natural gas, liquefied petroleum gas, coal gas and other industries to detect various combustible gases, including: hydrocarbons, liquefied petroleum gas, natural gas, hydrogen, etc. .
All-in-one gas detector: a detection instrument that can be configured with a single gas or multiple gas sensors. It can be configured with a single, two-in-one, three-in-one, four-in-one or any four toxic gas sensors or any single gas sensor. Perform testing.
