Refractometers can be used to measure solution concentration and are applied throughout the food, agricultural, chemical and manufacturing industries.

The most common application is the determination of dissolved sugar solids in food products such as soft drinks, fruit juices, concentrates , and ripeness of fruit, particularly grapes and fruit for winemaking. Also for measuring of wort for brewing and alcohol in spirits.

Hand held refractometers are used for rapid 'on the spot' determination of solution concentration. Hand held models offer the user a low cost, reliable optical measuring instrument which is very easy to use.

The ATC function allows you to use the refractometer in an ambient temperature range of 50-86 degrees Fahrenheit (10-30 Celsius.) 

Because your sample is just one drop, and will quickly adjust to the temperature of the refractometer, the temperature of the sample is irrelevant. 

All our refractometers have ATC as standard... Each unit   comes with a manual calibration knob that is secured with a lock nut. To calibrate place one drop of distilled water on the testing platform and adjust to zero if necessary