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18   OI/266/WIHART-EN | 2600T Series Pressure transmitters
5 Mounting
5.6 Mounting a P style pressure transmitter 
(266H and 266N)
The pressure transmitter can be mounted directly on the 
manifold. 
A mounting bracket for wall or pipe mounting (2” pipe) is also 
available as an accessory.
Ideally, the pressure transmitter should be mounted in a 
vertical position to prevent subsequent zero shifts.
Figure 14: Model 266H or 266N High overload resistant P-Style transmitter with 1/2-14 NPT male process connection and barrel housing 
installed on a 2”pipe with optional bracket (B1 carbon steel or B2 Stainless Steel 316L)
Important. 
If the transmitter is installed inclined with respect to the 
vertical, the filling liquid exerts hydrostatic pressure on the 
measuring diaphragm, resulting in a zero shift. In such an event, the 
zero point can be corrected via the zero push-button or via the “set 
PV to zero” command. Please refer to the [configuration section] for 
further details. For transmitters without diaphragm seals the Vent / 
Drain considerations below should be taken into consideration.
91 (3.58)
72 (2.83)
18 (0.71)
113 (4.45)
29 (1.14)
18 (0.71)
145 (5.71)
18 (0.71)
16 (0.63)
36 (1.42)
108 (4.25)
49 (1.93)
19 (0.75)
32 (1.26) width across
flats of exagon
18 (0.71)
113 (4.45)
29 (1.14)
18 (0.71)
145 (5.71)
91 (3.58)
18 (0.71)
16 (0.63)
108 (4.25)
72 (2.83)
39 (1.54)
49 (1.93)
54 (2.13)
1/2 - 14 NPT
32 (1.26) width across
flats of exagon
Figure 15: Model 266H or 266N High overload resistant P-Style transmitter with 1/2-14 NPT female process connection and barrel 
housing installed on a 2”pipe with optional bracket  (B1 carbon steel or B2 Stainless Steel 316L)