PLRM-4 circle polarimeter
The manual PLRM-4 circle (half-shadow) polarimeter measures the rotation angle of the plane of polarised light precisely — a 589.44 nm monochromatic sodium lamp, a ±180° range, a 0.05° vernier reading and x4 magnification. Supplied with 100 and 200 mm tubes.
- Monochromatic sodium lamp, 589.44 nm
- Measuring range ±180°, vernier reading 0.05°
- x4 eyepiece magnification for precise setting
- 100 and 200 mm polarimeter tubes included
- Manual control — simple, intuitive operation
- For pharmacy, chemistry, sugar industry and education
The PLRM-4 circle (disc) polarimeter is a classic, manually operated half-shadow instrument for the precise measurement of the rotation angle of the plane of polarised light. By setting the fields of view to equal brightness, it determines optical rotation and, from it, the concentration and purity of optically active substances.
A simple principle, a reliable result
A beam from the 589.44 nm monochromatic sodium lamp passes through the polariser and the sample; the measurement consists of bringing the field of view to uniform brightness and reading the angle. A ±180° range, a 1° dial scale and a vernier with 0.05° resolution give accuracy sufficient for routine analysis, while the x4 eyepiece magnification makes precise setting easier.
Where it fits
The PLRM-4 is used in pharmacy, the chemical and food industries, the sugar industry and in teaching — wherever the content of substances such as sugar solutions, turpentine oil or camphor must be determined. It ships with 100 and 200 mm polarimeter tubes. When you need an automatic readout, see the PLRS-200 semi-automatic polarimeter or the fully automatic series P polarimeters. Write to us and we will match the right model.
Datasheet (PDF) — coming soon