Hi Demi,
Cleaning/Wash process is different with pressure sensors because the diaphragm (gel) inside the device.
Our Quality Engineers do not recommend to clean this devices. However, if you want to clean the device, you can only clean it on the outside, with some paper or swab with alcohol.
Any cleaner that that enters the pressure sensor opening may have adverse effects on the device.
So, sealing the access hole on the part with kapton tape is absolutely recommended. You can plug also the sensors with a cap before cleaning.
Caps can be found via stockcap
Ultrasonic cleaning is not recommended as the frequencies can damage wire bond interconnections.
Many customers have gone to no clean operations or spray clean in a direction where the spray is not directly going into the sensor hole.
Have a great day,
Jose
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