1. What is a PID sensor?

    Photoionization Detector is a high-precision gas sensor that ionizes gas molecules with ultraviolet light to detect volatile organic compounds (VOCs) in the range of 0.1ppb~10000ppm, such as benzene, formaldehyde, ethylene, etc.

2. Core advantages of PID sensors

GD-PID Photoion sensor

1. Ultra-high sensitivity

Can detect ppb-level benzene series (such as benzene ≤ 0.1ppm, exceeding the national standard GBZ 2.1-2019 limit)

Applicable to harsh environments such as petrochemicals and semiconductor plants

2. Broad-spectrum detection capabilities

Covering 500+ VOCs (ionization energy < UV lamp energy can be detected)

Common detection gases:

Benzene series (benzene, toluene, xylene)

Halogenated hydrocarbons (trichloroethylene, carbon tetrachloride)

Ketones (acetone, butanone)

3. Anti-interference design

Built-in water vapor compensation algorithm (humidity effect < ±3%)

Prevent high-concentration gas shock (automatic range switching)

3. Working principle of PID sensor

Ultraviolet light irradiation: 10.6eV ultraviolet light bombards gas molecules

Ionization reaction: VOCs molecules lose electrons and become positive ions

Current detection: ions form current between electrodes, the higher the concentration, the greater the current

4. Typical application scenarios

1. Industrial safety monitoring

Petrochemical industry: Tank area/pipeline leakage detection (compliant with SH 3063-2021 standard)

Printing workshop: Real-time monitoring of benzene series (connected to PLC automatic exhaust system)

2. Environmental law enforcement

VOCs unorganized emission detection (HJ 604-2017 method)

Pollution tracing: Quickly locate the leakage point with a portable PID detector

3. Laboratory analysis

Emergency detection: Toxic gas screening at the accident site

Scientific research experiment: VOCs release monitoring during the reaction process

5.Selection Guide

6. Precautions for use

UV lamp protection: avoid detecting H2S>100ppm gas (will cause sulfur poisoning of the lamp tube)

Regular calibration: calibrate with isobutylene standard gas every 3 months (50ppm standard gas is recommended)

Cleaning gas path: flush the sensor with high-purity nitrogen every month (to prevent particle blockage)

More deails of PID sensors, pls feel free to contact us:

ShanXi TengXing Sensor Technology Co.,Ltd

Web: www.tensensor.com

Email: [email protected]

Tel/WhatsApp: 86 18335818384