Hand-Held Refractometers Require No Tools for Calibration
High accuracy makes these Hand-Held Refractometers a great value. Exclusive "Zero-Ring" eliminates calibration tools for convenient use in the field or in the lab. Largest field of view available with a hand-held unit. Choose from tough, all-metal models with Brix, Salinity and Coolant scales. Some models available with an Automatic Temperature Compensation (ATC) feature. All Refractometers include a protective case.