Polarimeter Measuring Scale Arc Measuring Range +/-180 Degrees Resolution 0.1 Accuracy +/-0.05 Degrees Optical Wavelength 589 nm Sensitivity Up to 99.9 Percent Light Source LED Max Sample Cell Length 200 mm Voltage 110/220V AC Hz 50/60 Hz Height 18 7/64 in Width 5 33/64 in Length 12 63/64 in Features 589nm Filter Instructional Applications Long Life LED Quality Control Rugged Design Simple Operation Includes 100mm and 200mm Sample Cells Power Cord