Varec 4532 - Manual (Page 21)

Varec, Inc. 11
4532 Installation
4.4 Installation Instructions
Note! The level sensor circuit is connected to ground and is infallibly galvanically isolated
from the supply and output circuit and from the temperature measurement circuit.
All metal parts of the sensor and the transmitter shall be electrically conductive and
securely be connected to the potential equalization system within the hazardous area.
4.5 Special conditions for safe use
To exclude ignition sources due to sparks caused by impact or friction, even in the event
of rare incidents, do not subject the temperature sensor tube to environmental stress,
such as impact from moving parts. Also, make sure the bottom part is secured.