http://www.smartec.nl/pdf/DSSPD100GD.pdf
Im using this pressure sensor. can any one can help with the code to get the readings from this please. 
There are 6 pins. Three of them are not to be connected. The other three seem pretty obvious.
The device outputs a signal in manchester format. Have you read up on how to read that?
Ya i know the hardware part. In the datasheet it says output from the sensor will be 14 bits. One byte all the bits and on the other most sinificant 6 bits. I just wanted to know how to get those 14 bits. If you can explan how it will be so much of a help for me.
Thanm you.
The data sheet is pretty clear in describing how the data are transmitted. You can use polling to read an input pin, capture the highs and lows and deduce the timing (which is variable).
Try this link CLICK ME. With each passing day I feel stronger that the most powerful tool available to us today is GOOGLE, to find that link all I did was google "SPD100GD Arduino" and a wealth of potentially very pertinent information came up. The link I gave you is for the SPD100 not exactly the sensor you have so proceed with caution or google yourself and get a better link.
Always try google before you ask a forum, you do not have to have a very good idea of what to search for. Computers are great learning tools as you can ask them questions that don't make sense repeatedly and they don't get tired of you they have infinite patience. I used to tell people I worked for "If it weren't for Google I had to know what I was doing" somewhat in jest but trying to get the point across that it is an amazing source or information.
wwbrown i search on the google. the sensor your mentioning and the sensor i'm using is totally different.
jremington thank you for the information. i'll try to use polling. if i could make it ill let you know thank you very much.
i could not come with the polling. can any one give me a code that i can get the output of this sensor please..
here is the datasheet.
http://www.smartec.nl/pdf/DSSPD100GD.pdf
or can any one just explain deeper how to get the output of this sensor 14bit from a arduino please.