3 ms·

Looks like the same stuff on Adafruit or ebay but more expensive.

• the__alchemist 6y ago
  I was surprised that this doesn't seem to be the case - For example, I can't find any pH sensor on Adafruit. There is a model that's easy to find on eBay or Amazon, sold under various brands - I was unable to get this working, likely due to documentation or software issues.
  • bob29 6y ago
    I'm using "Aquarium Hydroponic PH Electrode Probe/Liquid PH Value Detection Sensor" on ebay for $36 with probe. It even came with example code. I'm using it for a basic application and only roughly calibrated it with paper tests using tapwater and vinegar. I'm only measuring between ph 5-8 and my application doesn't really require precision.
  • gregsadetsky 6y ago
    I only found one soil pH sensor on Adafruit, but it's currently sold out: https://www.adafruit.com/product/4026 https://www.adafruit.com/product/4026
    • flaviu2 6y ago
      That's a capacitive moisture sensor. It is incapable of measuring pH.
      • gregsadetsky 6y ago
        Oof, you're right of course. My bad! Thanks
  • sokoloff 6y ago
    I picked this sensor somewhat randomly on Aliexpress and it seems to work well (with calibration on both, tracks closely to my commercial Nutra-Dip Trimeter). For hydroponics (where 0.1 pH is plenty of precision and pH range should be inside 5-8), I was quite happy with the $14 version below. https://www.aliexpress.com/item/32957428276.html?spm=a2g0s.9042311.0.0.b7e34c4dnzVnEX https://www.aliexpress.com/item/32957428276.html?spm=a2g0s.9...