AFRISO RG 210 Betriebsanleitung Seite 42

4.2 PTC thermistor probe type 937
The product and the PTC thermistor probe are connected by means of a sig-
nal cable.
A PTC thermistor is contained in the probe head. During operation, the PTC
thermistor is heated and can distinguish between gaseous and liquid media
due to the different heat dissipation.
The PTC thermistor probe is a wearing part. It must be replaced after no
more than ten years.

Fig. 2: PTC thermistor probe type 937
Product description
A
B
C
D
E
F
A. Screw fitting G½ or G1
B. Probe cable
C. Brass weight
D. Protective sleeve for PTC thermis-
tor
E. PTC thermistor
F. Switching point (mark)
RG 210
EN
10