For organic vapors detection, what type of sensor is most commonly used?

Photoionization detectors (PIDs) are widely recognized for their effectiveness in detecting organic vapors. This type of sensor works by using ultraviolet light to ionize the vapors present in the air, which allows for the measurement of those compounds based on the resulting electrical current. This method is highly sensitive and can detect a variety of volatile organic compounds (VOCs), making it particularly suited for environments where these compounds are present.

Unlike catalytic bead sensors, which primarily detect flammable gases through a thermal process, or electrochemical sensors, which are designed for specific types of gases (often toxic ones), photoionization detectors provide broader detection capabilities for organic vapors specifically. Infrared sensors, while effective for certain gases and specific applications, are not typically used for surveying organic vapors where quick detection and a wide range of sensitivity are needed.

The versatility and sensitivity of photoionization detectors position them as the preferred choice in hazmat scenarios where rapid and accurate identification of organic vapors is critical.