PID Analyzers develops sensors & analyzers for air, water and process applications and sells these products worldwide. The sensor technologies include photoionization, infrared, electrochemistry, catalytic combustion, flame ionization, capacitance, thermal conductivity, process gas chromatography... Many of our analyzers are multifunctional and include multiple technologies. The parameters measured include: VOCs, O2, H2O, fixed gases, SO2, NO2, NO, CO2, formaldehyde... at ppb to % levels.