Datasheet

DATA SHEET
Technical changes reserved
0141 0316-39 07.2013
Temperature Sensor
DS 1820
Thermal transition resistance of measuring
object-sensor
This is the main measuring error which occurs during surface mea-
surements. This can be eliminated by providing good thermal contact
through mounting in a tube, applying thermal conducting paste or ther-
mal conducting adhesive.
Thermal heat transfer of sensor-ambient temperature
During surface measurements, the measuring arrangement should
be thermally insulated from the surroundings, for example, with some
foam material or mineral wood.
Thermal heat transfer of sensor-connecting wires
This measuring error can be minimised by itself, for example, if the
connecting lead used is as thin as possible and the connecting material
is a bad thermal conductor or if the connecting wire is tempered with
the measuring object. In principle, of course, the highest measuring
accuracy is achieved through immersion in liquids or in a mounting
tube. However, an additional measuring error should be included while
taking measurements on surfaces.
Customer’s own probes
Technically conversant users with knowledge of soldering can also
make the probe themselves. Connector conguration of Dallas 1820
sensors is as below:
Care should be taken that a capacitor 100 nF is directly wired at the
sensor between +5 V and GND, in order to improve the EMV behavi-
our. You can obtain the required accessories from us like sensors, at
cables, RJ12-connector or crimping tool.
Complimentary information
Further information on „Dallas Touch bus“ and also a detailed data
sheet of temperature sensor DS 1820 is available from the website.
bb-sensors.com
GND
DATA
VCC 5V
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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