H87.0.0X.6C-01
Operating manual G 7500 Series
page 17 of 34
6.6 Design of the sensor GWO 5610
6.6.1 General
The oxygen sensor is an active sensor. It consists of a platinum cathode, a lead
anode and potassium hydroxide (KOH) as an electrolyte. If oxygen is present, it is
reduced on the platinum cathode and the sensor delivers a signal. If no oxygen is
present, no signal is delivered. The anode is consumed by the oxygen measurement.
The sensor ages. Furthermore, the sensor loses water through the permeable
membrane, in particular, when it is stored in dry air. Therefore, it should be checked
and maintained regularly and replaced as necessary.
The electrode contains potassium hydroxide. This causes burns. All
contact with the skin, clothing and eyes should be avoided.
Nevertheless, should contact occur, take the following measures.
Eyes: Flush with flowing water for at least 15 minutes, seek medical
attention!
Consult a doctor.
Always store oxygen sensor GWO 5610 wet!
- In a storage bottle filled with water or
- place in a container with water.
After prolonged storage before the measurement, clean the membrane
with a soft paper towel of possible coverings (algae, bacteria, ...).
6.6.2 Design
Shaft
Membrane
head
Refill opening
Storage bottle
Platinum electrode
