Would not calibrate properly. Got a replacement and it also would not calibrate properly. Took it to a friend that was very familiar with refractometers and the problem seemed to lie with the alignment of the prism in such a way that the cover lens could not lie flat on the prism. Returned and requested a refund and ordered ebayโs choice refractometer and it calibrates and works fine. I suspect the first two I got that would not calibrate properly were from the same batch and most must work fine according to the number of positive reviews.
Accurate And Versatile Digital PH Meters For Food, Brewing, Hydroponics, Pools And More!
7 Review
TDS water quality tester - TDS water hardness meter (portable digital salt meter for water analysis)
9 Review
Efficiently Test Your Antifreeze And Battery Acid With A 3-In-1 Refractometer
18 Review
๐ PH 1-14 Extensive Storage Testing Monitoring: Optimize Your Storage with Precise pH Level Monitoring
6 Review
๐ฌ๏ธ Advanced 3-in-1 Indoor Air Quality Monitor with CO2/RH/Temp Data Logging and Audible Alarm - NDIR Sensor Technology
8 Review
๐ก๏ธ Continuous Temperature Monitoring with Relative Humidity Integration
4 Review
Digital multimeter RGK DM-12
6 Review
๐ง UEi Test Instruments DAFM3B Digital Multimeter
6 Review