Push-Button Contacts - Bosch BME280 Mounting Instructions

Bosch Sensortec | HSMI BME280

The BME280 sensor is sensitive to light, which can influence the accuracy of the measurement.
Therefore, the hole in the top lid shall not be exposed to direct light during operation

The BME280 shall not be placed close to fast heating parts. In case of temperature changes >
3.0°C/sec during operation. It is recommended to follow Bosch Sensortec application note BST-
BMP280-AN004, "Correction of errors induced by fast temperature changes". Please contact your
Bosch Sensortec representative for details

During handling of the BME280, especially in case parts are handled manually, make sure that
no objects, like for example tweezers tips or other sharp objects do get inside of the vent hole of
the sensor. This could damage the device

Ultrasonic welding: ultrasonic welding can induce damage in the pressure sensor. Customer – in
case of using this process in his manufacturing line – has to secure the parameter of the process
for each project individually to protect the pressure sensor

Vapor phase soldering: connecting BME280 on the PCB through vapor phase soldering might
cause deposits on the diaphragm which can distort the electrical signal
In case you have any questions with regard to the mounting of the sensor on your PCB, do not hesitate to
contact us.
The scenarios described below – given as examples – may lead to a bending of the PCB, which as a
consequence, might influence the performance of a sensor mounted on the PCB.
Please note that this possible behavior is not limited to Bosch Sensortec devices, but may as well occur
rd
with 3 party MEMS devices in a similar manner.

5.4. Push-button contacts

Keep a reasonable distance to push-button contacts, when placing the sensor device. Do not position the
sensor directly beneath a push-button contact.
Document number BST-BME280-HS006-00 | May 2018
© Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third
parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany.
Note: Specifications within this document are subject to change without notice.
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