Application of PID sensor developed by JXCT
How does a PID sensor work?
Inside the PID sensor, there is a small UV lamp filled with gas (most likely krypton) and 2 small mesh gratings. A UV lamp generates ultraviolet light inside the sensor's chamber and projects it onto a small mesh grating. This UV light ionizes VOC gases entering the chamber, breaking them down into positive and negative ions. These ions pass through the mesh grid, positive ions are attracted to the negative grid, and negative ions are attracted to the positive grid. A positive charge delivered to these gratings generates a current that is equivalent to the VOC reading on the detector head.
What is sputtering and how does it affect my PID?
Inside most PIDs, there is a metal ring, called an electrode, that helps keep the gas inside the lamp. As the PID sensor is used more and more, the surface of the metal ring inside the lamp will eventually vaporize. These vapors coat the interior of the lamp, hindering its ability to produce UV light, which affects the sensor's ability to detect VOC gases and renders it ineffective.
The PID may fail without any notification as it will simply read that the area is free of the target VOC gas. As a result, personnel may be unknowingly at risk, exposed to highly carcinogenic gases on a daily basis, leading to chronic illness among employees. Therefore, it is important to implement a PID sensor with minimal spatter to keep your personnel safe.
How does humidity affect my PID sensor?
When the temperature and humidity levels of the environment housing the PID are constantly changing.This can cause condensation to form inside the PID lamp. This condensation affects the UV light emitted by the lamp, which affects the ionization energy of the VOC. Eventually, this results in sensor drift, false readings, or possibly no readings at all.
This can be very dangerous and can expose personnel to high levels of harmful VOCs such as formaldehyde or benzene. Therefore, having a PID sensor that has little ability to allow condensation to build up is very important to keep personnel safe.
How to avoid these effects on PID sensor?
Our newest PIDs use electrodeless UV lamps so there are no metal ring electrodes inside the sensor. This completely reduces the effects of sputtering and contamination without reducing the reliability or performance of the PID. Ultimately, provide a PID sensor with lower maintenance costs but higher performance.
Additionally, the PID sensor has a patented electrode stack design. This design ensures that humidity and temperature issues are completely eliminated when the PID is running. Thereby providing customers with a reliable and accurate gas safety system throughout the entire life cycle of the sensor.
PID sensors not only reduce spatter and humidity effects, but also provide additional market-leading advantages. For example, our PID sensors can provide up to 30,000 hours of lamp life. This is a 200% improvement over market standards, making it the longest lasting bulb on the market. Therefore, reduce maintenance costs by replacing and extending the life of the PID sensor.
PID Photoionization Detectors-VOC sensor
The PID photoionization probe& pid sensor realizes rapid detection of VOC gas, is waterproof, easy to clean, durable, multi-range selection, and accurate measurement. PID module is high sensitive and quick react. It can help you alarm the VOC at the first time and make sure your health.Pid sensor (PID optical ion probe) is widely used in VOC detection in factories, mining areas, chemical industry areas and other environments.
