Dew point sensor, TPS
Technical data
Application
Storage temperature: Sensor wire extendable up to:
−20 … +70 °C
These dew point sensor were developed in conjunction with alre dew point monitors and cooling ceiling controllers for the spe- cific purpose of detecting and signalling the dew point. In this way, they prevent dripping condensa- tion water from reaching the cooling circuit parts, if installed correctly.
50 m with 2 x 0.5 mm²
Connecting cable:
10 m
Accessories:
For use with dew point sen- sors (e.g. WFRRN) or climate controllers with dew point monitoring (KTRRB, KTRRU, KTRRUu, KTRVB, KTFRL, KTFRD)
Type/image
Item no.
Features
PG
TPS 1
Mounting/Attachment: using clips on cooling ceiling capillary pipe Use: Drywall cooling ceiling (plasterboard) with hung up capillary pipe mat, metal cooling ceiling with integrated capillary pipe system Sensor wire extendable up to: 50 m with 2 x 0.5 mm² Box contents: sensor, 2 clips for cooling pad
G8000299
I
TPS 2
Mounting/attachment: Using clips on cooling ceiling capillary pipe or cable ties on the pipe Use: Pipe systems transporting cold water, plaster cooling ceiling with capillary tube system
I
G8000300
Sensor wire extendable up to: 50 m with 2 x 0.5 mm² Box contents: sensor, 2 clips for cooling pad, 2 cable ties
TPS 3
Mounting/Attachment: attach to pipe by means of cable ties Use: Pipe systems transporting cold water Sensor wire extendable up to: 50 m with 2 x 0.5 mm² Box contents: sensor, 2 cable ties
SN120000
I
TPS 3
Dew point sensor method of operation: If the surface temperature of the dew point sensor is equivalent to the dew point, a microscopic film of moisture forms on its surface. This film changes the resistance value of the dew point sensor to such an extent that the connected controller or monitor detects this change and disables the cooling. In this manner, dripping condensate water at maximum cooling, and hence moisture damage to the building, are avoided. When the dew point sensor dries off again, the resistance value increases and cooling is re-enabled. To ensure that a pending undershooting of the dew point is detected in time, the dew point sensor should be assembled at the point where the dew point is most likely to be reached first along the cooling circuit. Generally, these locations are at the inlet coming into the room and/or near windows. If the place where the dew point is most likely to occur cannot be unambiguously determined, it is possible to connect up to 5 dew point sensors in parallel to one controller or monitor.
Important note: The inflow ducts of TPS-1 and TPS-2 are closed before shipping to avoid dirtying during assembly. After assembly, they must be shortened with a knife until they are flush with the wall or ceiling to ensure air circulation. The air ducts should be arranged such that soiling during operation is avoided. It is important that the air surrounding the sensor has the same temperature as the room air to be cooled. If the humidity and temperature of the air to be cooled (ceiling cooling system) is different from that of the air surrounding the sensor, condensation may be detected prematurely or too late. As re- gards TPS-3, contact with the PCB paths must be avoided to prevent long-term corrosion. Attention in case of sensor extension: Parallel laying to conductors carrying a mains voltage can result in faults. The use of shielded con- ductors reduces sensitivity to electromagnetic fields.
Catalogue 2022 | Page 136
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