Bellingham + Stanley Digital Refractometer RFM700-M SeriesRobust, Fully Automatic Refractometers The RFM700 M Series are robust, low cost, fully automatic refractometers covering the full Brix range (0 100, depending on the model) that are ideally suited to the food, sugar and beverage industries. They can also be used in many other non food applications where temperature control is not required such as measuring sugar concentrations in the food processing industry. Designed with simplicity in mind, RFM700 M