Chain of meters for measuring the electrical properties of gas-sensitive materials

The measuring chain includes: LumaSense IN 5-L plus pyrometer, Kelvin Probe KP6500 McAllister, Photoacustic analyser INNOVA 1314, Keithley 6517A electrometer / Keithley 2000 multimeter, Alltech Digital Flow Check + Testo 625 thermo hygrometer