Reichert Scientific Instruments 10482 ABBE Mark II Refractometer
The photo is a view in the eyepiece, using water, and the displayed index of 1.3327 is about what water is supposed to have at room temperature. Provision for thermal control of the stage by means of a water circulatory system. 115 VAC 50-60 Hz, 25 Watt This products seems to work. The instrument, where only the thermometer powers up, has an eyepiece that needs cleaning and lubrication. The instruments can be previewed at our facility in Ventura, California.