As an entry-level model in digital refractometry, the DR101-60 covers many areas of application. It offers excellent value for money, in terms of procurement and operation. Calibration is performed with distilled water. The waterproof case allows the DR101-60 to be rinsed under running water and also features automatic temperature compensation.

The DR201-95 is a compact digital hand-held refractometer which eliminates user-related reading errors associated with most manual hand-held refractometers. Specially developed for fast and easy quality and process control, it has a wide measuring range for refractive index and sugar scales. Thus, one DR201-95 can replace several existing instruments. A special model is available with an Oechsle scale instead of a sugar scale for measuring alcohol content. Both instruments are low-maintenance and are calibrated with distilled water. The 1.5 V battery lasts for over 1000 measurements.

The digital hand-held refractometer DR301-95 has more functions than a simple hand-held refractometer while being more cost-effective than desktop units. Besides the refractive index, sugar and salt scales, up to two other scales can be programmed. To program these scales, the hand-held refractometer can be connected to a PC via a serial interface. The software supplied allows results to be managed and printed out. While the instrument can be operated as a mobile unit with a 9 V block battery, the optional power supply unit turns the DR301-95 into a laboratory refractometer. The stainless steel sample plate can be cleaned quickly and easily. Calibration is performed with distilled water and features optional temperature compensation. For incoming goods control applications, an upper and lower tolerance alarm can be entered.