KROHNE H250 M40 ATEX II3G Ex nA EN - Manual (Page 4)

2
DEVICE DESCRIPTION
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H250 M40
www.krohne.com 01/2012 - 4001485201- MA H250/M40-Ex-II3G-AD R01 en
Device description
2.1 Device description
Variable area flowmeters measure and display the volume flow of flammable and non-
flammable gases and liquids. Depending on the device version, electrical limit switch contacts
and a 4...20 mA signal output with HART
® communication, a Foundation Fieldbus interface or a
Profibus PA interface can be installed in the display.
2.2 Description code
The safety description code * consists of the following elements:
* positions which are not needed are omitted (no blank positions)
1 Series measuring section H250
H250 - standard version, vertical upwards
H250H - horizontal orientation
H250U - vertical downwards
2 Measuring section materials / versions
RR - Stainless Steel
C - PTFE or PTFE/ceramics
HC - Hastelloy C
Ti - Titanium
F - Food
3 Heating jacket version
blank- without heating jacket
B - with heating jacket
4 Series of indicators
M40 - Aluminium housing, coated (standard)
M40S - Aluminium housing with increased protection
M40R - Stainless steel housing
M40T - Stainless steel housing with increased protection
5 High temperature version
blank - without HT extension
HT - with HT extension
6 Electrical signal output
blank - without transmitter
ESK - Electronic signal output 4...20mA (ESK4)
. . . - optional with counter, I/O modul and display (ESK4-T) or
. . . - Foundation Fieldbus (ESK4-FF) or
. . . - Profibus PA (ESK4-PA)
7 Limit switch
blank - without limit switch
K1 - one limit switch
K2 - two limit switches
R1 - one reed switch
R2 - two reed switches
8 Explosion protected version
Ex - Explosion-protected equipment
9 SIL Version
SE - SIL compliant signal output
SK - SIL compliant limit switch
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