Function and layout of the multi X 2500 multi X 2500
34
Fig. 25 Measuring cell "high sensitive"
1 Base element of the measuring cell with magnetic
stirring rod
Opening "Sen" (for the sensor electrode)
Opening "Ag" (for the silver electrode)
Opening "Pt" (for the platinum electrode)
5 Opening "Gas" (for the gas inlet tube)
6
Opening for the direct injection
Opening for the adapter to the extraction
connection
Fig. 26 Loaded measuring cell "high sensitive"
1 Gas inlet tube with screw connection for
measuring gas
Adapter to the extraction connection
Sensor electrode with pre-amplifier
4 Opening for the direct injection with plug
5
Silver electrode
Platinum electrode with salt bridge
Measuring cell
The sensor electrode combines the indicator and the reference electrodes for the
measuring cell "high sensitive". A 0.6 mol/l Na
2
SO
4
solution is used as an internal
electrolyte which is introduced and refilled via the refilling port.