Inaccurate reading or stabilization. I contacted the seller through Amazon and waited for a response. it is not calibrated as the instructions show, just random numbers from samples with known pH values. I hope they send a new one that works. unfortunately there is no way to catch up. Addendum: Received a replacement delivery, which was also defective. worse than the original. I then received a refund as they would not replace a second defective item. very frustrating. I'm not sure if all items are scrap or if shipping is difficult for them. I reluctantly have to give a one star rating.
Efficiently Test Your Antifreeze And Battery Acid With A 3-In-1 Refractometer
18 Review
Accurate And Versatile Digital PH Meters For Food, Brewing, Hydroponics, Pools And More!
7 Review
Portable digital multimeter with sound continuity and thermocouple (electric tester) LTX DT-838
7 Review
Digital PH Meter Tester - Tiaoyeer Water Quality Tester With ATC, 0.01PH High Accuracy, 0.00-14.00 Measurement Range, 0.01 Resolution For Drinking Water, Aquarium, Swimming Pools, Hydroponic
8 Review
π¬οΈ Advanced 3-in-1 Indoor Air Quality Monitor with CO2/RH/Temp Data Logging and Audible Alarm - NDIR Sensor Technology
8 Review
π Dioxide Controller for Digital Gas Monitoring
5 Review
π₯ Advanced Testo Wireless Hot Wire Anemometer Technology
4 Review
Digital multimeter RGK DM-12
6 Review