pressure sensore interface with pic18f452- help!!

[alarmclock]

hi.. i was thinking to interface a temperature sensor with pic18f452 in my project but just for a change i thought a pressure sensor interface would be better to elaborate the project to say measure the depth of water.

But i can't find any literature on how to use mpx4115a(or any other) pressure sensor to measure fluid pressure with the micro controller.

If anyone has had an experience to work with this type of sensor then kindly pls pls pls tell me.. im waiting......[/b]

 

[atferrari]

A friend of mine who works at Google got this in no time:

Resultados 1 - 10 de aproximadamente 4.090.000 de pressure sensors application notes. (0,53 segundos)

(Yes, he speaks Spanish.)

Sensym and Motorola had LOT of application notes. Freescale?

 

[kender]

Here's a group dedicated to sensors, which was specifically set up for solving problems such as yours:
**broken link removed**
Mirror your question there, and you could get a good discussion.

But i can't find any literature on how to use mpx4115a(or any other) pressure sensor to measure fluid pressure with the micro controller.

Depends on the fluid. MPX4115A is a mems air pressure sensor. The sensing element isn't corrosion resistant. It's known that water destroys the sensing element of such pressure sensors quickly. However, the sensor can be modified to work with water.

Be sure also to check the operating range of pressures.

 

[alarmclock]

Re: pressure sensore interface with pic18f452

is there any other pressure sensor that is used to specifically measure water depth?
And as the experiment has to be carried out in a small scale so pressure range is not all that an issue. So any water pressure sensor would work.
I do have a temperature sensor example in the book i'm referring to ( mazidi ).
The only main thing in it to decide the range and the corresponding Vref.
Is the procedure same for measuring pressure??

 

[bobcat1]

Hi

National have nice application note on how to use pressure sensor to measure liquid level also see freescale site for how to use pressure sensor

Basically most pressure sensor have analog voltage output proportional to pressure range they can measure
All you have to do is to interface it to the micro ADC (check the alalog voltage is in range with the micro measuring capability)

There are also (a bit more expensive) sensors with digital output where you can use SPI or I2C communication to interface them

All the best

Bobi

The microcontroller specialist