Rudolph Instruments Equipment List Rudolph Instruments - Sirius 151Manufactured by Rudolph InstrumentsThe Sirius 151 Visual Polarimeter is a high precision, cost-effective Manual Polarimeter. Rudolph Instruments - DigiPol-DP781 SeriesManufactured by Rudolph InstrumentsAutomatic Polarimeters Rudolph Instruments - HP 100Manufactured by Rudolph InstrumentsThe HP 100 is a leading-edge compact polarimeter designed to measure the optical activity of soluble substances. Page 1 of 1 1Ask a QuestionGet answers for Rudolph Instruments ProductsSign in to Submit QuestionSubmit Question