NEK
Seite 6
NEK K05/0516
9. Maintenance
The Conductive Level Switch is maintenance-free.
Should the electrodes be contaminated with a non-conductive coating (oil,
grease, etc.), they can be cleaned with a suitable tool (e.g. cloth). Do not use a
cleaner that would damage the plastic housing.
10. Technical Information
Case:
PPS (Rhyton) or polypropylene
Electrodes:
stainless steel 1.4571
Connections:
R 3/4 or 3/4 NPT male thread
Operating temperature:
-25 to +85 °C (PPS)
-25 to +60 °C (polypropylene)
Max. pressure:
20 bar (PPS)
6 bar (polypropylene)
Installation position:
horizontal or vertical
Contact components:
open collector (NPN or PNP)
wet
signal
Option:
relay (floating changeover contact)
Electrical connection:
2 m encapsulated cable
3-core screened (open collector)
5-core unshielded (relay)
Supply:
18-29 V
DC
< 20 mA
Switch-in delay:
dry/wet: 0.5 sec.
wet/dry: 0.5 sec.
Sensitivity:
approximately 50 k
Min. Conductance:
approximately 100 µS/cm
Switch capacity:
open collector:
max. 32 V / max. 100 mA / short-circuit-proof
Relay:
max. 1 A / 30 V / short-circuit-proof
Protection type:
IP 68