Review on Fine-Tuned Precision for Optimal Aquariums, Hydroponics, Testing, Measuring & Inspecting by Cody Wuol
Not calibrated: pH measurement
I liked the first cheap model this replaced. The old one had an included screwdriver that you used to adjust the pH to a solution. The new model - the first lasted a year, but the calibration was constantly lost with everyday use. This is not calibrated upon arrival. The electrodes are broken.
- Substance analysis devices
- Ugly packaging
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