Invert sugar refractometer, sugar range: 0 to 85% (by weight) (% invert sugar) The device is easy to use and guarantees fast and accurate measurements in seconds.

ELECTRONIC pH-PAPIER Checker® 1 - pH Tester with Electrode HI 1270 and batteries, Resolution 0,01 pH, with batteries

COMBO Tester for pH/EC/TDS/C° to 20 mS, waterproof, with batteries