PID gas detector capable of detecting VOCs at low levels of concentration
PID gas detector capable of detecting low concentration VOCs
Gases and vapors that cannot be detected by PID gas detectors include radioactive gases (Rm), air (N2, O2, CO2, H2O), common toxic gases (such as CO, SO2), natural gas (methane), acidic gases (such as HCI, HF , HNO3) Freon gas, ozone, etc.
The PID gas detector is capable of detecting extremely low concentrations of volatile organic compounds with high accuracy and can meet the quantitative detection of low-concentration benzene. It is a non-destructive testing instrument
PID gas detector capable of detecting low concentration VOCs
Calibration of gas detectors is based on the ion current corresponding to a known concentration of a known gas. The instrument response of other gases is related to their own properties. A reading of 10 ppm indicates that the instrument is producing the same ion current as the 10 ppm calibration gas. The actual concentration of other gases at which this reading is obtained may be more or less than this value. Since the PID reading is always related to the calibration gas, this reading should be expressed in ppm units related to the calibration gas, and the actual measured concentration value cannot be used directly, unless the pollutant detected is the same as the calibration gas, or the instrument reading has been calibrated . Usually PID is calibrated using isobutylene because among the VOCs that can be detected by PID, the response sensitivity of the sensor to isobutylene is at the average level and is relatively easy to obtain.
PID gas detector capable of detecting low concentration VOCs
The PID gas detector is mainly a PID, or photoionization gas sensor. The PID gas detector is an instrument that can detect extremely low concentrations of volatile organic compounds and other toxic gases. Especially the sensitive detection of VOC, which is a harmful substance in gas, plays an important role in its effective monitoring.
The use of PID photoionization sensors in gas detection instruments ensures the accuracy and precision of measurement data, and can measure VOC or other toxic gases from 0.1 to 2000 ppm. PID is a highly sensitive wide-range detector that can be regarded as a "low concentration LEL detector"
