User guide

4 ALTOFLUX 2W IFM 4042 K - EEx
1.2 Data plates
IFM 4042 K-EEx, type "EEx de [ib]" IFM 4042 K-EEx, type "EEx de"
1.3 Primary head
The primary head is the measuring unit of the IFM 4042 K-EEx compact flowmeter and contains
two field coils (see table below for the type of protection) and two electrodes in type of
protection intrinsic safety category "ib" according to EN 50020.
Meter size Type of protection
DN 10 up to DN 150 Housing: Encapsulation "m" according to EN 50028 and
increased safety “e” according to EN 50 019
Electrodes: Intrinsic safety "ib" according to EN 50020
DN 200 up to DN 300 Housing: Powder filling “q” according to EN 50017 and
increased safety “e” according to 50 019
Electrodes: Intrinsic safety "ib" according to EN 50020
DN 350 and larger Field coils: Increased safety "e" according to EN 50019
Electrodes: Intrinsic safety "ib" according to EN 50020
NOTE
The intrinsically safe electrode circuits of the IFM 4042 K-EEx compact flowmeter
are only internal circuits and not accessible for the customer.