KROHNE BM 70 M - Manual (Page 90)

4 BM 70M-EEx/ BM 70Mi-EEx
unassigned stainless steel (standard) 9 Type of waveguide window
H Hastelloy
Materials of wetted parts
SS stainless steel
HB Hastelloy B (V96 only)
HC Hastelloy C (V96 only)
Ti titanium (V96 only)
antennas and flanges including
coating
Ta tantalum (V96 only)
K6375 Kalrez 6375
K4079 Kalrez 4079
K2035 Kalrez 2035
K1091 Kalrez 1091
FPM Viton
10
gasket materials
FEP FEP sheathed gasket
11 Field of application, Device
Group II 1G Category 1G (use in Zone 0)
(1) places not needed in the type code may be omitted
3 Main safety-relevant characteristics
3.1 Signal converter
The BM 70 M-EEx level gauges consist in each case of a combination of signal converter and
flange system. The main characteristics of the explosion-protected signal converter are
described below.
3.1.1 Category / Zone allocation
The signal converter part of the BM 70 M-EEx level gauges is basically designed in Category 2
for application in Zone 1.
3.1.2 Types of ignition protection
BM 70 M-EEx with non-intrinsically safe I/O functions
Variant Device part Type of protection Symbol
Electronics compt Flameproof Enclosure
Terminal compt Increased Safety
BM 70 M/E-EEx
Pin coupler compt Increased Safety
Electronics compt Flameproof Enclosure
Terminal compt Flameproof Enclosure
BM 70 M/D-EEx
Pin coupler compt Increased Safety
EEx de
BM 70 M-EEx with intrinsically safe I/O functions
Variant Device part Type of protection Symbol
Electronics compt Flameproof Enclosure
Terminal compt Increased Safety
BM 70 Mi/E-
EEx
Pin coupler compt Increased Safety
Electronics compt Flameproof Enclosure
Terminal compt Flameproof Enclosure
BM 70 Mi/D-
EEx
Pin coupler compt Increased Safety
EEx de [ia]