Document number BST-BME280-HS006-00 | May 2018 Bosch Sensortec
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parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany.
Note: Specifications within this document are subject to change without notice.
5.1. Recommendation details for the humidity measurement
The following chapter presents guidelines about the design of the housing and the placement of the
BME280 on the PCB to get accurate measurements at a fast response time for the humidity part.
Deviations of temperature and the relative humidity (RH) between the sensor and the environment should
be avoided. This can be realized by thermal decoupling of the device within the PCB and coupling of the
sensor to the environmental conditions.
Figure 1: Deviations of temperature and relative humidity has to be minimized to get accurate measurement
Following guidelines are recommended to avoid heating of the BME280 within the smartphone
The sensor should be not more than 10% in the active state to avoid self heating, please
check the datasheet for more details how to minimize the power consumption at a particular
resolution
Thermal decoupling of the sensor will assure that heat conduction takes place between heat
sources and the sensor
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