Apera Instruments PH60S Pocket pH Tester simply measures the pH level of food samplings such as cheese, sushi rice, meat, fruit, milk, yogurt, sauce, and other solid/semi-solid samples like cosmetics, and solid growth media in a reliable and quick manner (Also works great for general water solution's pH measurement). The probe adopts Swiss LabSen sensor technology, featuring a spear glass membrane with a long life reference system (polymer electrolyte), built-in temperature sensor, and a double-junction structure, which makes the probe more durable and have a longer service life . Up to 3 points (4. 00, 7. 00, 10. 01) of auto. calibration with 0 to 50˚C auto. temperature compensation (ATC), 0. 01 pH, 0. 5˚C accuracy with -2. 00 to 16 00 pH range, auto. recognition and reminders of stable values improve reading consistency, saving you the trouble of guessing when to manually hold measurement (auto-hold function available). The product is CE and RoHS certified, and is manufactured under an ISO 9001: 2015 certified quality system.