The Sirius 251 Visual Polarimeter is a high precision, cost-effective Manual Polarimeter. The unique Vernier of the Sirius 251 allows reading of Left (levo) or Right (dextro) rotation with ease and accuracy. Ideal for chemical, pharmaceutical, medical and school laboratories, the Sirius 251's functional design provides exceptional optics, maximum light transfer to sample, in addition to a host of other benefits. Efficient and convenient to use, this unit enables the user to switch lamps, filters and sample cells, quickly and easily. It comes equipped with a half-shade field allowing for easy field matching and analysis of small bore sample cells.