Statox 501 PID – VOC measurement in the ppm range

PID technology is used for detecting substances that cannot be detected by other methods. This includes organic solvents and fuels, also known as VOCs (VOCs = volatile organic compounds).

The gas molecule to be measured is split inside the PID detector by a very high-energy UV light beam into charged particles, also known as ionisation, which are discharged at the plates of the capacitor. The resulting discharge current is proportional to the number of molecules and therefore to the concentration.

The Statox 501 PID works with a 10.6 eV lamp and can therefore measure all substances that can be ionised with 10.6 eV or less.

PID gas analysers are calibrated with isobutene. As other substances are displayed with different sensitivities based on this gas, the corresponding calibration factors must be taken from a response table in order to display the concentration correctly. On request, our Statox 501 PID can be calibrated at the factory to your requirements so that it is ready for use immediately after delivery.

Similar to the voltage signal of a heat tint sensor, the Statox 501 PID provides a linear output signal that is analysed and displayed by our Statox 503 Control Module. A 4-20 mA analogue output and the three powerful relays of the control module forward the measured value and, if necessary, alarm signals to a process control system or other peripheral devices.