LPS22HB as pressure sensor

[Barbie]

I try to use the LPS22HB as real pressure sensor (measure of force against the skin, but I almost didn't see any change. Only when press with big force I see the change.

Does the name of barometer mean it can't sense pure pressure against its window?

[Miroslav BATEK]

The pressure sensor sense air (or liquid in case of waterproof sensor) pressure.

There are holes in the window, through which the air is going to the sensing element.

[Barbie]

Thanks Miroslav.

I understand why its not work for us.

Do you know on other MEMS or method we can measure true force ?

[Barbie]

I read now about Piezoresistive MEMS LPS33HW. Also it is written as barometer,

1. Can it be use directly as pressure measure over its window?
2. DOes the tube over its windows is a must or can be order without?

[T J]

measure true force with a strain gauge or load cell

they are cheap and linear

You can use a resistive touch screen if you are adventurous. (non trivial)

But these types of technologies have continual drift as stresses continually subside

and its a slow technology, readings every 500mS its a slow update speed.

[Miroslav BATEK]

@Barbie​ 

1. Pressure of what? Liquid? Gas?
2. The tube cannot be removed.

I think you want to measure force, for that pressure sensor is not suitable.