Datasheet

DATA SHEET
Technical changes reserved
0141 0316-144 04(2014
Dew Formation Probe for Sensor Switching Module
Description
Typical areas of applications
• Cool ceiling switch, air conditioning systems
• Humidity protection in switchgear cabinets
• Monitoring of at roofs
• Condensate detection in external walls
• Ventilation regulation in sanitary rooms
• Leakage monitor for water tight housings
• Industrial applications, laser systems
Characteristic features
• Detection of high air humidity, dew formation or condensation
• Double sensor principle for highest working reliability
• Application range from 0% to 100 rH, 0 to 60° C
• Model with connection cable and plug
Features
The dew formation probe detects upcoming condensation, before it ori-
ginates. The application areas are right from automatic ventilation cont-
rols for sanitary rooms, showers or swimming halls, humidity monitoring
for external walls, pipelines or cellar rooms, monitoring of cool ceilings
& display windows and also humidity control in switchgear cabinets. In
addition, the probe is also used for special applications, for example, as
protection switch for submerged pumps or as condensate protection for
chilled laser mirrors.
The measuring probe is a combi-sensor consisting of two single sensors.
One resistive dew formation sensor in thick layer technology regulates
the high value of relative humidity (approx. 93 to 99 % RH). A second,
conductance sensor embedded as interdigital structure on a carrier sub
-
strate detects possibility of condensation.
The combination of these two processes result into a reliable switching
behaviour, because of which the probe is also suitable for critical appli
-
cations like cool ceilings.If the sensor is used without any thermal contact
to an object, the electronics switches ON on reaching very high humidity
value, for example, during fog. Further areas of applications come up if
the probe is kept under thermal contact to an object, for example, if the
rear side is adhered to the object to be protected by means of a thermal
conducting medium: In such a case, the probe responds to surface humi
-
dity of the object and switches ON directly before reaching the dew point
i.e. before the condensate originates.
In combination with universal sensor-switching module 156503/17/30,
this dew formation probe results into a dew formation protection switch
for universal applications.
Technical Data
Dew formation probe
Measuring range 93..99 % RH
Sensor element
SHS A1 and also gold
plated Interdigital structure
Tolerance ± 3 % RH
General
Probe dimensions Ø 12 x 90 mm
Probe material PVC / Epoxide FR4
Cable material PVC
Connection RJ12-plug, 6-pole
Cable gland M16
Cable length 1 m
Guarantee 24 months
Scope of supply Measuring probe with documentation
Art.-No.:
Dew formation probe
SENSW-BTF
B+B Thermo-Technik GmbH | Heinrich-Hertz-Straße 4 | D-78166 Donaueschingen
Fon [phone] | Fax [phone] | [e-mail] | bb-sensors.com
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