KROHNE H250 M9S ATEX II3D Ex t-II3G Ex nA EN - Manual (Page 4)

2
DEVICE DESCRIPTION
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H250 M9
www.krohne.com 10/2012 - 4000646002 MA H250/M9-Ex-II3GD-AD-R06-en
Device description
2.1 Device description
Variable area flowmeters are used to measure and display volume flows of flammable and non-
flammable gases and liquids. Depending on the device version, electrical limit switches and a 4-
20 mA signal output or a Profibus PA interface can be built into the indicator part.
2.2 Description code
The safety description code * consists of the following elements:
* positions which are not needed are omitted (no blank positions)
The indicator M9 standard version and M9R stainless steel version is not available for equipment
categories II 3 G and II 3 D.
1 Direction of flow
H - horizontal orientation
U - vertical downwards
no identifier - standard upwards
2 Materials / versions
RR - Stainless steel
C - PTFE or PTFE/ceramics
HC - Hastelloy
Ti - Titanium
F - Sterile version (food)
3 Heating jacket version
B - with heating jacket
4 Indicator part series
M9 - Indicator M9 standard indicator
M9S - Indicator with increased protection
M9R - Indicator in stainless steel housing
M9T - Indicator in stainless steel housing with increased protection
5 High-temperature version
HT version with HT extension
6 Electrical signal output
ESK - Electronic transmitter
7 Limit switch
K1 - One limit switch
K2 - Two limit switches
8 Explosion protection
Ex - Explosion-protected equipment
AD_H250_M9_II3GD_R06_en_646002_PRT.book Page 4 Wednesday, October 17, 2012 8:03 AM