Specifications 
IM/265Gx/Ax-EN-07 265Gx, 265Ax  75 
 
 
9.8  Technical specification 
 
 
Change from one to two colu mns 
 
 
IMPORTANT (NOTE) 
Please refer to the ordering information to check the 
availability of different versions of the relevant model. 
 
Materials 
Isolating diaphragm
1
 
Ceramic (AL
2
O
3
); 
gold-coated; 
Hastelloy C276
TM
; 
Hastelloy C276
TM
; 
gold-coated; 
Stainless steel (316L / 1.4435) 
Process connection
1
 Hastelloy C276
TM
; 
Stainless steel (316L/1.4404) 
 
1 
Transmitter parts that make contact with the medium 
 
Seal
1
 
(for sensor code C, F only) 
Viton
TM
; 
Perfluoroelastomer 
(Chemraz
TM
) 
Buna (NBR) 
Sensor filling fluid  Silicone oil, inert filling (carbon 
fluoride), white oil (FDA) 
Mounting bracket  Stainless steel 
Sensor housing  Stainless steel (316L / 1.4404) 
Electronics housing and cover  Barrel design 
•  Aluminum alloy with a 
copper content of 
<
 0.1 %, baked epoxy 
finish
 
• Stainless steel 
(316L / 1.4404) 
DIN design 
•  Aluminum alloy with a 
copper content of <
 0.1 %, 
baked epoxy finish 
O-ring cover 
Viton
TM
 
Local zero position and span 
adjustments 
Fiber glass-reinforced 
polycarbonate plastic 
(removable), no adjustment 
options for stainless steel 
housings 
Name plate  Stainless steel (304 / 1.4301) 
or plastic data plate attached to 
the electronics housing 
 
Calibration 
Standard: 
0 to upper range limit (URL) for 
ambient temperature and 
atmospheric pressure 
Optional:  To specified span 
 
Optional accessories 
Mounting bracket  For vertical and horizontal 60 
mm (2") pipes or wall mounting 
LCD display  Pluggable and rotatable design 
Additional tag for indicating 
measuring points 
Tag with wire (both stainless 
steel) attached to the 
transmitter, with a maximum 
of 30 characters including 
spaces. 
Lightning protection  Up to 4 kV 
•  Voltage pulses: 1.2 μs rise 
time; 50 μs delay time at 
half value 
•  Current pulses: 8 μs rise 
time; 20 μs delay time at 
half value 
Not available for devices with 
ATEX-Ex nA or Profibus 
PA/FOUNDATION Fieldbus 
featuring ATEX-Ex i or FM 
intrinsically safe designs. 
Cleanliness level for oxygen 
applications 
 
Certificates 
(test, design, characteristics, 
material traceability) 
 
 
Process connections 
1/2 - 14 NPT internal or external thread; spigot to DIN EN 837-
1, G 1/2 B  or  G 1/2 B (HP)  for  convex seal; front-bonded diaphragm; 
for installation in ball valve. 
 
Electrical connections 
Two 1/2 - 14 NPT or M20 x 1.5 threaded bores for cable glands 
directly on housing, 
or plug connector 
•  HART: Straight or angled Harting Han 8D (8U) connector and one 
mating plug. 
•  FOUNDATION Fieldbus/PROFIBUS PA; 7/8" plug/M12 x 1 
 
Terminals 
HART version: Four terminals for signal/external display, 
for wire cross sections of up to 2.5 mm
2
 (14  AWG), and four 
connection points for testing and communication purposes 
Fieldbus versions: Two signal terminals (bus connection) for wire 
cross sections of up to 2.5 mm
2
 (14 AWG) 
 
Grounding (optional) 
Internal and external ground terminals for wire cross sections of up to 
4 mm
2
 (12 AWG) are provided. 
 
Mounting position 
The transmitter can be installed in any position. The electronics 
housing may be rotated 360 °. A stop is provided to prevent 
overturning. 
 
Weight (without options) 
Approx. 1.2 kg 
Additional 1.5 kg for stainless steel housing 
Additional 0.65 kg for packaging 
 
Packaging 
Carton with dimensions of approx. 240 x 140 x 190 mm 
(9.45 x 5.51 x 7.48 inch) 
 
 
Change from one to two colu mns