General purpose optical refractometer for RI & dispersion measurement.
The Bellingham & Stanley Abbe 5 refractometer offers affordable direct measurement of refractive index & Brix and is ideal for academia as well as within use in industry.
The Abbe Refractometer derives its name from the 19th Century physicist Ernst Abbe (1840-1905). Abbe designed an instrument for measuring the dispersion of light and this became the precursor for the so-called ‘Abbe Refractometer’.
The Abbe 5 is an affordable refractometer ideally suited for use where a wide refractive index measurement range is required such as in small contract laboratories or applications where sample throughput is relatively low. The instrument is also ideal for practical demonstrations and experiments in chemistry and physics laboratories of schools, colleges and universities.
The sample is placed on the prism and is illuminated by aligning the chrome-plated reflector with a suitable light source (day light or optional light source with intensity control). Adjustment of the Achromatising prisms provides a means of ensuring the reading is obtained at the correct frequency (589nm for standard measurement). The borderline may then be observed through the single eyepiece and the reading in either Refractive Index or Brix may be taken from the integral scale.
The instrument may be configured to work in either the traditional ‘transmitted mode’ or for non-homogenous or opaque samples, ‘reflected mode’ may be chosen. Dispersion measurements of hydrocarbons or solids materials such as glass, contact lenses and fibre optics may be made in accordance with standard practice.
Waterbath connections provide prism temperature control, with the prism temperature being monitored electronically and displayed on the integral digital display. With good temperature control and precise calibration, readings may be obtained to 4 decimal places RI or 1 decimal Brix.
The Abbe 5 refractometer is supplied with a glass calibration plate, contact liquid, and instruction manual and is packed in a hard flight case for easy transportation and storage. Limited warranty is 24-months.