The dbx-55a digital refractometer has been developed for compactness and ease of operation. Lt is useful for the quality control, and research and development of new products within the food, beverage and other industries. A reading of the dbx-55a can be shown to the second decimal place. It provides a measurement range from brix 0.0 to 55.0% with minimum scale brix 0.1% or 0.01% [selective by switching operation] and measurement accuracy brix 10.1% or -0.15 to +0.14% [at 10oc to 30oc], brix 0.2% or -0.25 to +0.24% [at 5oc to 10oc or 30oc to 40oc] and has temperature correction 5oc to 40oc.