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Which VOC sensor for isopropyl alcohol??
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Which VOC sensor for isopropyl alcohol??

by tkinsman on Fri May 25, 2018 2:06 pm

Adafruit makes several different Volatile Organic Compound (VOC) sensors.

I want to use one to detect Isopropynol, Isopropyl alcohol, or SD Alcohol-40. (Found in white-board dry-erase markers.)

Does anyone have any experience or an opinion about which VOC sensor I should buy for detecting alcohols?

tkinsman
 
Posts: 158
Joined: Sun Sep 25, 2016 2:04 pm

Re: Which VOC sensor for isopropyl alcohol??

by kevinjwalters on Thu Aug 01, 2019 11:01 am

SD Alcohol-40 appears to be a specific type of denatured ethanol. The MQ-3 and MiCS-5524 are both very sensitive to ethanol, have a look at Adafruit Learn: Comparison and Experimentation with Flammable Gas Sensors: Testing Gases. Latter works better with steady air flow, both needs protection from draughts for good readings.

gas.sensor.test.20181023.t15.png
Gas sensor test - red wine low ppm (3 drops of red wine about 6 inches from sensor)
gas.sensor.test.20181023.t15.png (69.66 KiB) Viewed 39 times


I still have those two sensors. I'll try and find some propanol if you're still interested in that?

kevinjwalters
 
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Joined: Sun Oct 01, 2017 3:15 pm

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