Hi everyone,

I am looking for a digital absolute pressure senso. I have found out those of Measurement Specialties, like the MS5540C. But I am wondering if someone can poit me out to other sensors of the same kind.

Thanks a lot

Gilles Plante

 

Hey.. welcome to AAC.
Did you try googling, find some and post it here so we can discuss, and find what is best for ur needs.

 

Yes,

I googled a lot, quite a lot . The one from Measurement Specialties are very interesting: SPI interface, individually calibrated. See http://www.intersema.ch/products/guide/calibrated/ms5540c/ for one of the sensors. There was one from VTI technologies, see http://www.vti.fi/en/support/obsolete_products/pressure_sensors/. This one was even better, because you don't have to compute compensated pressure and provide a clock. Unfortunately, it is discontinued. I also found this http://www.hoperf.com/sensor/hp03m.htm from Hoperf. But they state it should not be used for certain needs. So there is only one provider found.

I would like to know if I miss some others. Sometime you don't always find on Internet.

Thanks

 

Hmmm tht will do,
Post ur application. then we can find what is most suitable for you

 

I can't tell much because of an NDA. I need to know at which the depth an equipment will be. Diving computers use a pressure sensor and then compute the depth. I prefer to have a sensor that provide digital output. Since the quipment will be small, the sensor has to be.

 

We will need info to help. Sorry

 

What kind of information would you like me to provide then ?

 

show us ur application
tell us what you want to do.
If you have a prototype then show it.
We are not going to steal ur method or what ever it is. for our benefit.
This forum shares knowledge that's all

 

Didn't check anything lately but google for Sensym. They had incredible good application notes. Learnt a lot from them.

 

if you are still doing this i can get some information from some really good ME's at work tomorrow.

 

kingdano,

yes I am still looking for pressure sensors. I would be pleased if you can provide some information.

Thanks

 

Are you looking for something that is checking the pressure in a down-hole environment? Or is it basically for depth?

 

retched,

It is to get depth. I am looking for the kind of sensors used in diving computers.

 

Ahh.. Why didn't you ask..

Here is a BUNCH of good info. You may also want to check out some of the OPEN SOURCE dive computers.. They will have a bunch of the work done for you.

http://www.rebreatherworld.com/rebr...ive-computer-innard-pics-needed-mounting.html

Look at post #6 for links to what will help you.

 

... http://www.vti.fi/en/support/obsolete_products/pressure_sensors/. This one was even better, because you don't have to compute compensated pressure and provide a clock. Unfortunately, it is discontinued. ...

Yes, that's unfortunate. But Sparkfun has large quantity of these sensors in stock.

 

You would have to be sure to buy them out if you plan on making this a production model. BUT, good design calls for you to use a component that will be available in the future, or has a pin for pin and spec equivalent.

If you only want to make 5, buy 25 of the sensors and you should be good for a little while. But from what Im gathering from this thread and the NDA, Im guessing you want this a little more rounded.