150 PSI Air Pressure Sensor

**ghosty** · 08-10-2007, 08:23 PM

Hi All. Dakota Digital http://www.dakotadigital.com have these units SEN-09-3 which is a local pressure sensor for vacumme and 0-30 PSI pressure, ideal for measuring turbo boost. I have asked and they tell me the signal out is 0 to 5 vdc.
Perfect for the Fusion Brain, and the pressure is right in the range we want to measure so it is going to be nice and accurate.

**inh** · 08-10-2007, 08:39 PM

seems that dakota digital has a lot of nice sensors. i wouldnt mind the tire pressure ones.. i bet they all work off of 5vdc..

**Maheriano** · 09-02-2007, 11:04 AM

I have a bunch of these with my air ride kit, if you have any graphical representations of how you wired it, please post!

**Ryann** · 10-26-2007, 02:46 AM

were we at with this?

**greenman100** · 10-26-2007, 01:07 PM

The post above gives the range of values the sensor works with.

You want to make a circuit like this:

+5vdc-->100ohm resistor--->sensor signal lead and fusion brain input--->sensor--->ground

**Ryann** · 10-27-2007, 04:13 AM

well seein ive never done this sort of ohm businesscan u give me more detail and ill have a go at making some..? you guys wont be making and selling them?

**2k1Toaster** · 10-27-2007, 05:11 AM

"Ohm" is the term of measurement for resistance. A resistor at RadioShack is a few cents. It has 2 leads connected usually to a cylindrical plastic or ceramic housing. Inside that housing is "magic" that wastes electricity and turns it to heat (seriously, well not the magic part.

) So you take +12v from the car into any side of a 100Ohm resistor. Then the other side of that resistor connects to 2 things. 1 "thing" is the Brain's sensor input. The other "thing" is 1 side of the air pressure sensor. Then the other side of the air pressure sensor goes to ground from the car.

And we were going to discuss if this would be worthwhile to sell, but as you can see, it is very simple.

**Ryann** · 10-28-2007, 04:10 AM

thanks 2k1, so i need i guess 4 of these 100 ohm puppies, not 180 ohm like said in previous posts in this topic?

**2k1Toaster** · 10-28-2007, 05:19 AM

100 vs. 180 makes very little difference. It is not uncommon for a resistor to be in the kiloohm to megaohm range (1000 to 1000000) so a difference of 80 isnt too big of a deal in a case like this.