Voting resources, early voting, and poll worker information - VOTE. ... Adafruit is open and shipping.
0

air pressure sensor
Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.

air pressure sensor

by godfather55v on Thu Jun 25, 2020 12:03 pm

i'm looking for a air pressure sensor that will measure from 0 - 8 inches of water of air and the air will be about 200 degree's Fahrenheit. I'm going to use w/ with a raspberry pi, so it either needs to be powered from the 5 or 3 volt on the board, or i need to learn how to power a 12 volt sensor.

godfather55v
 
Posts: 14
Joined: Tue Jul 26, 2016 3:57 pm

Re: air pressure sensor

by dherrada on Thu Jun 25, 2020 4:43 pm

I don't believe Adafruit stocks any water-resistant barometric pressure sensors that can go up to 200F, but they do stock 2 that are guaranteed to operate up to 85C/185F. It wouldn't surprise me if they worked at 200F, but you'd have to test that yourself.

https://www.adafruit.com/product/4258
https://www.adafruit.com/product/4414

dherrada
 
Posts: 99
Joined: Thu Jan 04, 2018 4:59 pm

Re: air pressure sensor

by godfather55v on Mon Jun 29, 2020 3:44 pm

I'm looking for somthing that i can pipe air into the sensor. This would be similar for a hvac setup

godfather55v
 
Posts: 14
Joined: Tue Jul 26, 2016 3:57 pm

Re: air pressure sensor

by dherrada on Wed Jul 01, 2020 10:47 am


dherrada
 
Posts: 99
Joined: Thu Jan 04, 2018 4:59 pm

Re: air pressure sensor

by dherrada on Wed Jul 01, 2020 10:48 am

Oh, you said you needed something waterproof. In that case, I think this is better

https://www.adafruit.com/product/4414

dherrada
 
Posts: 99
Joined: Thu Jan 04, 2018 4:59 pm

Re: air pressure sensor

by godfather55v on Wed Jul 01, 2020 4:20 pm

can someone check my math, the description states 260 to 1260 hPa. Would that only be 0.005063495 inches of water? which would be far less then 6 inches of water that i need to measure?

godfather55v
 
Posts: 14
Joined: Tue Jul 26, 2016 3:57 pm

Re: air pressure sensor

by dherrada on Wed Jul 01, 2020 4:38 pm

Oh, gosh. I completely forgot inches of water was even a unit. Yeah, so according to this (https://www.convertunits.com/from/hPa/to/inch+of+water+column) 260hPa is 104 inches of water and 1260hPa is 505 inches of water. So I don't think any of the sensors I linked will work.

You're going to need something that is designed for measuring very low pressures, and I don't think Adafruit sells anything like that.

This board says it will work from 0-25 PSI, but looking at the datasheet, the range in hPa is 6-2500, so that definitely wouldn't work.
https://www.adafruit.com/product/3965

dherrada
 
Posts: 99
Joined: Thu Jan 04, 2018 4:59 pm

Re: air pressure sensor

by godfather55v on Wed Jul 08, 2020 11:34 am

i know, it's been most challenging to find this sensor. But it'll be worth it for my project. If you or anyone else have any none adafruit suggestions i do appreciate it.

godfather55v
 
Posts: 14
Joined: Tue Jul 26, 2016 3:57 pm

Re: air pressure sensor

by dherrada on Wed Jul 08, 2020 11:37 am

I might look at digikey. They've got an excellent parametric search. Find the sensor you want, and then see if anyone's made a development board for it.

dherrada
 
Posts: 99
Joined: Thu Jan 04, 2018 4:59 pm

Please be positive and constructive with your questions and comments.