MULTICAL® 403
Kamstrup A/S · Technical description · FILE100000166_B_EN-55121689_M1_07.2023
9.3.4 Pt500 ø5,0 mm / ø5,2 mm sensor types
It applies to both the ø5.0 mm and ø5.2 mm temperature sensors that they are delivered with attached composite
union nuts which is why they, as a rule, must be used as direct temperature sensors. The temperature sensors are
made of stainless steel and have a diameter of ø5.0 mm or ø5.2 mm. The temperature sensors are approved for
both PN16 and PN25 installations, with PS25 as the maximum pressure. The temperature sensors are based on a 2-
wire silicone cable and can thus be used with media temperatures up to 150 °C. This also applies to the composite
union nut that is made of the material PPS. One of the temperature sensors is mounted in the flow sensor on
delivery and therefore, only the other temperature sensor must be mounted if you choose to mount both
temperature sensors as direct temperature sensors. Asymmetric sensor installation (one temperature sensor
installed as a direct temperature sensor and one as a pocket sensor) must only be used if national regulations allow
this and never in installations with low differential temperature and/or low water flow.
Figure 16: Measurement and tolerance requirements when installing a
direct ø5.0 mm or ø5.2 mm temperature sensor.
Regardless of where the direct ø5.0 mm or ø5.2 mm temperature sensor is installed, it is very important that the
processing complies with the tolerances shown in Figure 16. If not, there is a risk that the O-ring may not seal
correctly. To avoid damage of the O-ring at the installation, it is important to use the guide on the following page
when installing the ø5.0 mm or ø5.2 mm temperature sensor as a direct temperature sensor.
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