# Low cost barometric pressure sensor

I'm looking for a very low cost barometric pressure sensor. The SCP1000-D01 available at Sparkfun and elsewhere is around $25 but I was hoping to find something in the$5-10 range. I am only interested in rough relative pressure change, so it does not have to have high precision or be calibrated. Basically something like the thermistor equivalent for pressure...

• tough question! -- i'll ask around at work when I get a chance -- there's some Japanese company that makes some pressure sensors that are low cost.... although it could be that they are just low cost in high volumes. – Jason S Dec 29 '09 at 1:02
• I just had this exact same question! – vicatcu Jan 18 '11 at 3:07

Futurlec has a few barometric sensor in the $5-10 range. These use I2C interface though, so a bit more involved in the MCU side than a simple analog voltage. http://www.futurlec.com/Pressure_Sensors.shtml If you're in Australia, you can buy from their Australian website as well. I would take a look at the sensors from Freescale. I bought an MPX4115A from Mouser.com for about$10. This is (supposedly) suitable for use as an altimeter; I haven't gotten to that project, yet. :-)