Installation
EngyCal RS33
18
Hauser
4.5
Installation instructions for temperature sensor(s)
B
A
C
D
L
L
A0008603
15
Installation types for temperature sensors
A - BFor cables with a small cross-section, the sensor tip must reach to the piping axis or a little farther
(=L).
C - D Slanted orientation.
The immersion length of the thermometer influences the accuracy. If the immersion length is
too small, errors in the measurement are caused by heat conduction via the process
connection and the container wall. For installation in a pipe, therefore, the recommended
installation depth ideally corresponds to half of the pipe diameter.
• Installation possibilities: Pipes, tanks or other plant components
• Minimum immersion depth = 80 to 100 mm (3.15 to 3.94 in)
The immersion depth should be at least 8 times the diameter of the thermowell. Example:
Thermowell diameter 12 mm (0.47 in) x 8 = 96 mm (3.8 in). We recommend a standard
immersion depth of 120 mm (4.72 in).
For pipes with small nominal diameters, ensure that the tip of the thermowell extends
far enough into the process so that it also protrudes past the axis of the pipe
((→ 15, 18), item A and B). Another solution may be diagonal installation
((→ 15, 18), item C and D). To determine the immersion length or installation
depth, all parameters of the thermometer and the process to be measured must be taken
into account (e.g. flow velocity, process pressure).
Refer also to the installation recommendations EN1434-2 (D), Figure 8.
