2018-06-18 02:17 AM
In section 10.1 of the datasheet for the LPS22HB the square on top of the package is labelled as 'Sensing area (exposed silicon)', which makes it sound quite fragile. However I noticed in a recent press release:
http://www.st.com/content/st_com/en/about/media-center/press-item.html/t4028.html
the LPS22HB is listed as 'Dust-free and water-resistant by design'. Is this square of silicon the sensing element or a protective cap (how fragile is it?), and is that the same of the LPS25HB?Many thanks.
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2018-06-19 09:33 AM
The sensor LPS22HB is water resistant but not waterproof. Common dust should not be a problem, but if you want to use is in some very dusty area if you recommend to put the sensor in a box wit some filters.
If you need waterproof sensor please use LPS33HW or LPS35HW.
2018-06-18 03:02 AM
Yes, the square of silicon is sensing element.
it is not fragile, it is more flexible.
It is the same as in the LPS25HB.
2018-06-18 08:42 AM
OK thank you for that information. Is the sensor dust and water resistant? I would think any dust on the sensing element will at least affect the readings?
2018-06-19 09:33 AM
The sensor LPS22HB is water resistant but not waterproof. Common dust should not be a problem, but if you want to use is in some very dusty area if you recommend to put the sensor in a box wit some filters.
If you need waterproof sensor please use LPS33HW or LPS35HW.
2018-06-19 12:26 PM
Thank you Miroslav. The environment I want to use this in isn't especially dusty so it sounds like this sensor will be OK for me.
Thanks again.