Review on Water pH Meter - Digital Professional High Accuracy pH Tester 🌊 with 0-14 pH Measurement Range, Ideal for Aquariums, Pools, and Drinking Water by Kathy Miller

So I opened the package, carefully read the instructions and followed the instructions. I filled 3 small glasses with distilled water with a recommendation, added 3 calibration powders separately, but could not get an accurate measurement. according to instructions. So I decided since I work at a sewage treatment plant and have government certified solutions I will test this at work and the picture shows those results. FYI this PH meter was purchased for home use in my specialty garden not for work but I cannot trust this product. Also pictured is my government PH tester next to my tester reading the same solution. Sad face.