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Description: Dew point controller
Measuring medium: Ambient air (without admixtures)
Operating temperature: 0...+60 °C
Humidity measuring principle: Resistive dew sensor
Humidity measuring range: 0...100% RH
Response time humidity: approx. 30 s (when changing from 75% RH to condensation)
Switching characteristic: Potential-free switching output (relay) 24 V AC, NO / NC contact selectable
Switching point: 90% RH, ±4 % preset
Switching capacity: 5A / 230 V AC; 5A / 30 V DC
Contact voltage: 24 V AC
Contact resistance: Closed: 100 Ω, open: > 1 MΩ
Switch display: LED green (power); LED not lit (dry); LED red (condensation)
Condensation: permitted
Condensation: Permitted for a short time
Hysteresis: approx. 4%
Pipe diameter: Ø 28-35 mm
Dimensions: (LxWxH) 65 x 60 x 42 mm (without mounting clamp, without cable)
Connection: Push-in terminal 0.0509–1.31 mm² (16–30 AWG)
Output: Switching relay
Operating current: typ. 7 mA, max. 30 mA (relay active)
Operating voltage: 24 V AC ±10%, 50 Hz or 24 V DC ±10%
Function check: Rote Power LED leuchtet bei Betrieb
Protective filter: Polyethylene sintered material
Type of protection: IP65
Weight: 0.11 kg

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.

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.


Typical 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 relay / opener )
  • In submersible pumps for detecting leakage
Title File name File Size File extension Date Download
Bedienungsanleitung Taupunktschalter 0557 0015 Bedienungsanleitung_Taupunktschalter_0557_0015 520kb pdf 2025-07-02 11:58
Operation manual dew point sensor 0557 0015 Operation_manual_dew_point_sensor_0557_0015 503kb pdf 2025-07-02 11:58
Description: Dew point controller
Measuring medium: Ambient air (without admixtures)
Operating temperature: 0...+60 °C
Humidity measuring principle: Resistive dew sensor
Humidity measuring range: 0...100% RH
Response time humidity: approx. 30 s (when changing from 75% RH to condensation)
Switching characteristic: Potential-free switching output (relay) 24 V AC, NO / NC contact selectable
Switching point: 90% RH, ±4 % preset
Switching capacity: 5A / 230 V AC; 5A / 30 V DC
Contact voltage: 24 V AC
Contact resistance: Closed: 100 Ω, open: > 1 MΩ
Switch display: LED green (power); LED not lit (dry); LED red (condensation)
Condensation: permitted
Condensation: Permitted for a short time
Hysteresis: approx. 4%
Pipe diameter: Ø 28-35 mm
Dimensions: (LxWxH) 65 x 60 x 42 mm (without mounting clamp, without cable)
Connection: Push-in terminal 0.0509–1.31 mm² (16–30 AWG)
Output: Switching relay
Operating current: typ. 7 mA, max. 30 mA (relay active)
Operating voltage: 24 V AC ±10%, 50 Hz or 24 V DC ±10%
Function check: Rote Power LED leuchtet bei Betrieb
Protective filter: Polyethylene sintered material
Type of protection: IP65
Weight: 0.11 kg

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.

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.


Typical 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 relay / opener )
  • In submersible pumps for detecting leakage
Title File name File Size File extension Date Download
Bedienungsanleitung Taupunktschalter 0557 0015 Bedienungsanleitung_Taupunktschalter_0557_0015 520kb pdf 2025-07-02 11:58
Operation manual dew point sensor 0557 0015 Operation_manual_dew_point_sensor_0557_0015 503kb pdf 2025-07-02 11:58

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FAQ

Der Versand unserer Produkte erfolgt per DPD gemäß ICC-Incoterms®2010: 

EXW B+B Thermo-Technik GmbH Donaueschingen Incoterms®2010


Zahlungsmöglichkeiten:


Wir akzeptieren die folgenden Zahlungsarten:


Kreditkarte (Visa und MasterCard):
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Vorauszahlung (Banküberweisung):
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Bitte beachten Sie: Bei Zahlung per Vorkasse erfolgt die Lieferung nach Zahlungseingang.

Sofortüberweisung:

Germany and Austria


Rechnung (Netto 30 Tage):

Deutsche Firmenkunden, 

Schweiz

Frequently asked questions & answers

We generally offer standard shipping via DPD. You can also pick up your order yourself or ship with your own tracking number. You can select the option you prefer during the ordering process.

You find more information about this topic on our rights of withdrawal page.

You can pay with PayPal, credit card (VISA and MaserCard), payment in advance, Sofortüberweisung (direct banking) and in some cases invoice. You can find more information on the page shipping and payment.

Yes, at B+B we can manufacture customised items for you with a minimum order value of €500.00.

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Certifications

Thank to the latest research, development and manufacturing technologies, as well as DIN EN ISO 3001:2015 and DIN EN 61340-5-1 certifications, we produce our products in accordance with the highest quality standards.

Calibration service

The B+B calibration laboratory is accredited by the German Accreditation Body (DAkkS) in accordance with DIN EN ISO/IEC 17025:2018 for the thermodynamic measurement parameters of temperature and relative humidity.

Individual manufacturing

You tell us your application and we will supply you with the right product for measurement and monitoring. We place particular emphasis on close cooperation in order to guarantee optimal product development in live with your requirements.

Location

B+B Thermo-Technik GmbH is based in the town Donaueschingen south-west Germany. From here, B+B quality products are distributed worldwide.