ION Science PID Response Factor Chart

This downloadable response factor chart serves as a comprehensive reference, providing you with essential gas information including gas names, formulas, CAS numbers, ionisation energies, and recommended lamp variants.

It addresses the needs of researchers and industry professionals by offering swift access to information on specific gases that PID can detect. Plus, the inclusion of detailed chemical formulas proves advantageous for individuals engaged in a spectrum of chemical processes.

The chart includes RFs for important chemicals, listed by their common names, but CAS numbers are recommended for precise identification. RFs are guideline figures, subject to variation based on PID design and operating conditions. ION Science advises calibrating the instrument to the target gas at the desired measurement concentration for accuracy.

Users should exercise caution in measuring PID responses at high or low concentrations, considering non-linearity, sensor clear-down time, and potential contamination of the PID window. Frequent calibration or bump tests are recommended, especially for less common volatiles. RFs labeled as ‘ZR’ indicate zero response, and ‘NA’ signifies an unavailable or insignificant value at toxic concentrations.

The RFs of many chemicals have been measured at ION Science typically with 10 and 50 ppm of the target volatile, using ten PIDs containing lamps of different photon energy and intensity and of different sensor designs. Generally, 50 ppm responses have been used. These RFs are indicated in bold in the chart.