PID stands for “Photo-Ionization Detector”. PID (Photoionization Detection) sensors are essential tools for monitoring air quality and can be incorporated into a hand-held, personal, or fixed detector for the detection of volatile organic compounds (VOCs) and some inorganic compounds.
Questions about PID sensors
What is a PID Sensor?
- A PID sensor is a device measure r volatile organic compounds (VOCs) to very low concentrations and other gases in the air. It relies on a process called photoionization to detect and quantify these substances.
How Does a PID Sensor Work?
- A PID sensor works by irradiating a gas sample with ultraviolet light. This light energy ionizes the gas molecules, producing positively charged ions and an electron. The resulting ionization current from the electrons is proportional to the concentration of the VOCs in the sample.
Where Are PID Sensors Used?
- PID sensors are used in a variety of industries, including environmental monitoring, industrial safety, hazardous material response, indoor air quality assessments and ambient outdoor air quality.
What Are the Key Advantages of PID Sensors?
- PID sensors offer fast and accurate measurements, real-time monitoring, and the ability to detect a wide range of VOCs. They are also portable and easy to use, making them versatile tools for many applications.
What Types of VOCs Can PID Sensors Detect?
- PID sensors can detect a broad spectrum of VOCs, including solvents, fuels, pesticides, and other organic compounds.
Are PID Sensors Safe to Use?
- Yes, PID sensors are safe to use when operated according to manufacturer instructions. They are designed to be non-destructive and non-invasive.
How to Calibrate a PID Sensor?
- Calibrating a PID sensor involves exposing it to a known concentration of a specific VOC and recording the mV response for that known concentration. This is often done at the zero point, at the midpoint and at the end of the detection range. Regular calibration ensures accurate readings.
What Factors Can Affect PID Sensor Accuracy?
- Environmental conditions, sensor contamination, and the presence of interfering compounds can affect some PID sensor accuracy on the market. ION Science’s innovative feature of humidity-resistance helps maintain optimum sensor performance in challenging humidity conditions, contributing to reliable and accurate readings in diverse environments.
Can PID Sensors Detect Gas Concentrations in Real-Time?
- Yes, PID sensors provide real-time measurements, allowing for immediate response to changing gas concentrations.
Conclusion
PID sensors are valuable tools for detecting and quantifying VOCs in various applications. Understanding their operation, maintenance, and suitability for different industries is crucial for their effective use. As technology advances, PID sensors continue to play a significant role in ensuring air quality and safety.