A photoionization detector or PID is a type of gas detector. Typical photoionization detectors measure volatile organic compounds and other gases in concentrations from sub parts per billion to 10 000 parts per million (ppm).

2019年9月30日 · PID Detectors are commonly used to monitor VOC’s (Volatile Organic Compounds). Many gases and vapours fall under the VOC banner and IGD’s PID’s can monitor for over 700 VOC gas species. This makes a PID an ideal first responder for VOC leaks even though the PID cannot directly determine the gas type detected.

2018年4月16日 · Photoionization detectors (PIDs) are increasingly viewed as the best method for the measurement of VOCs at exposure limit concentrations. However, the capabilities and limitations of these instruments need to be understood so that test results and subsequent decisions based on this important atmospheric monitoring technology are reliable.

PID sensors are the ideal choice for detecting low concentrations of volatile organic compounds. A PID (photoionization detector) is used to measure hazardous substance groups or can even be adjusted to measure individual substances.

PIDs rely upon ionization as the basis of detection. When sampled gas absorbs energy from. a PID lamp, the gas becomes excited and its molecular content is altered. the compound loses an electron (e-) and becomes a positively charged ion. once this process occurs, the substance is considered to be ionized.

What Is A PID Gas Detector And How Do They Work? PID stands for photoionisation detector and this device is used to measure the presence of volatile organic compounds (VOCs), which are any chemical compounds that possess significant vapour pressures and that can have serious effects on our health and to the environment.

The gas measurement device is based on gas chromatography (GC) and photoionization detection (PID) technologies. These technologies, used widely in laboratories, have a high acceptability due to their excellent analytical performance. The Dräger X-pid 9500 brings these technologies directly to the hazardous area of any production site.

It is an efficient detector and widely used to measure volatile organic compounds (VOCs) and some inorganic gases in concentrations from 1 ppb (parts per billion) up to 10,000 ppm (parts per million). When UV light is applied to VOC molecules, the VOC will be ionized to produce positively charged ions and electrons.

2016年11月1日 · The PID is a useful tool for various types of emergencies such as hazardous materials incidents, oil or gasoline spills, technical rescue, leaking cylinders or gas valves, nuisance complaints...

With a PID, the sample gas is exposed to deep ultraviolet light. The emitted light ionises targeted gases and they are then detected by the PID electronics and reported as a concentration (ppb or ppm). PIDs can measure Volatile Organic Compounds (VOCs) to very low concentrations.