Product Specifications; Function - Pepperl+Fuchs NVF-112-0400 Manual

LEVEL SENSOR

Product Specifications

2 Product Specifications
2.1

Function

EN
The sensor is designed for use with oil products.
The level sensor is a PTC resistor sensor. It is energized via an intrinsically safe relay.
The PTC resistor warms up if it is enclosed by air and, at the same time as falling current, the
ohmic resistance in the PTC resistor sensor increases. The intrinsically safe relay is in normal
status.
If the PTC resistor is enclosed by liquid, it does not heat up and the current increases. The
intrinsically safe relay switches to alarm position.
Caution!
Malfunction or damage through the use of the sensor as a level sensor in glues and paints
Glues and paints can coagulate when heated and stick to the sensor. This can impair the
properties of the sensor during temperature change and the safety and operation of the sensor,
or the complete alarm system, is no longer guaranteed.
Do not use the sensor as a level sensor in glues and paints or in liquids with similar properties.
Caution!
Malfunction or damage through the use of the sensor NVF-112-0400 as a level sensor in water
and other conductive fluids
The sensor will be damaged due to the conductivity nature of the liquid and the operation of the
complete alarm system is no longer guaranteed.
Do not use the sensor as a level sensor in water and other conductive liquids.
The sensor can distinguish between liquid and air.
6 - EN