The ST150 / ST350EX PID is a fixed PID gas detector suitable for the detection of volatile organic components (VOC’s). The ST150 / ST350 EX PID utilise the Photo Ionization measuring principle and is equipped with a 10.6eV PID lamp with a patented fence electrode. Because of this “fence”, the sensor has a better protection against atmospheric humidity and pollution. The PID sensor has a very fast response and a high sensitivity due to this gasses with an ionisation potential < 10.6eV are quickly detected. The PID gas detector is available in three measuring ranges, 0-10 ppm, 0-100 ppm and 0-1000 ppm. The ST150 is a non-Ex version and the ST350EX PID is ATEX and IECEx certified for use in Ex zones 1/2 and 21/22.