PID photoionization probe is an important detection module for voc detection. As a key precursor for the formation of PM2.5 and ozone. VOCs are an important cause of compound air pollution. At the same time, VOCs themselves are irritating and toxic. It can cause cancer and deformity in various organisms.
The main sources of VOCs include motor vehicle emissions, volatile oil leakage, solvent use emissions, liquefied petroleum gas use, industrial emissions, etc. Among them, motor vehicle emissions, gasoline volatilization, and solvent spraying are the three important sources of VOCs.
What is a PID photoionized gas sensor
PID photoionized gas sensor is a kind of extremely high sensitivity. A versatile sensor that can detect very low concentrations of VOC gas. Compared with traditional detection methods. It has small size, high precision, high resolution and fast response. Features such as continuous testing, real-time and high security.
How does the PID sensor sense VOCs?
The photoionization PID sensor uses a high-voltage alternating electric field. Some inert gases are ionized to produce ultraviolet light, and the energy of ultraviolet light is higher than that of visible light. It ionizes the gas into positively charged ions and negatively charged ions. Then use electronic methods to detect the number of these ions to determine the concentration of the measured gas.
PID can detect compounds with concentrations ranging from parts per billion (ppb) to parts per million (ppm). It is a supplement to non-dispersive infrared, electrochemical, and catalytic combustion gas sensors. It is also a gas detector with relatively high technical content.
Advantages of PID sensors
The high-precision photoionization sensor can detect ppb-level organic gases. The accuracy exceeds most common sensors such as infrared sensors.
Wide range of applications
The photoion sensor can detect most organic and some inorganic gases. It can be widely used in chemical, transportation, and other fields. Because the photoionized gas sensor is particularly sensitive to changes in the concentration of the detected object. It plays an important role in initial personal protection confirmation, leakage area confirmation, and pollution removal.
Except for a period of warm-up after the gas detection system is turned on. Under normal working conditions, the photoionization gas sensor can react almost in real time and can be tested continuously. When detecting dangerous gases here, it is of great significance to protect the health of the inspectors.