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Dew point controller for pipes, diameter 28 mm

Product no.: SHOP TPS-D28-BU

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This B+B dew point controller with condensate formation is an electronic hygrostat which is used for detecting dew formation and beginning of condensation on objects such as pipes and windows. It helps you to prevent this - in good time !

42,25 €
1 pc 30,75 €
Delivery will be effected within 4-7 working days with receipt of payment.
Dew point controller
Humidity measuring principle
Resistiv dew sensor
Switching point
94% RH surface moisture ±4%
Humidity measuring range
0...100% RH
approx. 4%
Application temperature
0...+60 °C
Short-time allowable
Measuring medium
Clean atmospheric air
Response time humidity
approx. 120 s (by change from 75% RH to condensation)
Analog output
Semiconductor relay
Contact rating
Potential free quiescent current contact, closed in normal operation (condensatfree). Open when operating voltage is missing or dew formation.
Contact voltage
Max. 39 Vss
Contact resistance
Closed: <30 Ω, opened: >1 MΩ
Switching display
LED red at closed contact (dry)
Operating voltage
24 V AC ±20%, 50 Hz or 20...28 V DC
Operating current
typ. 5 mA, max. 7 mA
Protective circuit
Transient protection (varistor) and anti-interference capacitor 10 nF
Function control
LED is illuminated in operating state ("POW")
Screw terminal, RM 3,5, clamping range 0,2...1,5 mm²
(LxWxH) 75x18x36 mm
Protection category

With the innovative measuring principle and the use of a special sensor with logarithmic characteristics, it is possible to control closely to the dew point  threshold without risking condensation. The dew point controller can be mounted directly and simply on pipes with the corresponding diameter. It is completely sealed so the electronics are optimally protected.

Areas of application:

  • For cooling ceilings to prevent condensation
  • For indoor pools and shop display windows to keep the double glazing fog-free and prevent steaming-up.
  • In drinking water and industrial plants to detect „sweating“ of cold pipes
  • In Hypermarkets, Concourses, Halls, Greenhouses and Storage facilities, to detect condensation formation on cold outdoor walls, steel doors, or to protect the stonework and masonry
  • In switch cabinets or in machines, to detect condensation on sensitive electronic components 
  • For humidity and leakage detectors
  • It can be integrated into alarm or warning systems ( by the potential-free relay / opener ) 
  • In submersible pumps for detecting leakage

It is also available with other diameters..... Simply ask us !

    Old Model.  Only as long as stocks last!   New variant with article number SHOP 0557 0015* 

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