On 5 Mar 2004 07:02:22 -0800, the renowned firstname.lastname@example.org
You want an 'absolute' pressure sensor (as opposed to 'gauge' or
'differential' pressure). The former type contain a vacuum reference
on one side of the pressure diaphram. For ambient air, a silicon
diaphram type is fine.
One inexpensive choice might be the Motorola MXM2102A 0-100kPa, but it
needs a 10V supply and an amplifier. The MPX6115A is 15-115kPa, runs
off a 5V supply and the output can go right into a 0-5VDC uP ADC. It's
around $18 one-off, more than double the price, but still not bad.
"it's the network..." "The Journey is the reward"
email@example.com Info for manufacturers: http://www.trexon.com
if you don't want to use a discrete device, where you have to build a
circuit arround, you can also use automotive pressure sensors. These
devices are named MAP - or BAP - Sensors. For your issue BAP - Sensors are
the most suitable ones. I know that Nissan uses such devices. They have the
benefit, that they are well tested on outdoor conditions. For pricing
information you can ask every Nissan garage
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