Study of gas sensors by in-situ DRS and dc electrical measurements in various environmental conditions

 

Impedance analyzer
ΗP 4192A
10Hz -10MHz
+ Home made cell
 
 
   +
Cluster of
3 mass flow controllers
1 liquid flow controller
Keithley
6220 current source
nA-100mA
2182 nanovoltmeter
nV-V
+ 4 probe cell
 
 
For controlling gas or
vapour concentrations
(water, organic solvents vapours)