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Photo-Ionization PID Sensors

Photo-Ionization detectors are based on the principle of ultraviolet (UV) light absorption by a gas sample to produce electrically charged particles (positively charged molecular ions and negatively charged electrons). These charged particles generate measurable electrical current at the sensor electrodes. PID detectors provide low range detection of many different gas and vapor species including highly toxic volatile organic compounds (VOCs). Selectivity is based on UV source energy and ionization energy of the target gas.