Polarimeter
Polarimeter: Precision Optical Measurement Instrument
A Polarimeter is an essential optical instrument used to measure the angle of rotation caused by passing polarized light through an optically active substance. Widely used in pharmaceutical, chemical, food, and research industries, our high-precision Polarimeters deliver accurate measurements for quality control and research purposes.
Key Features of Our Polarimeter
- High-resolution measurement with ±0.01° accuracy
- Wavelength range: 365nm to 633nm
- Temperature-controlled sample compartment
- Automatic calibration function
- LCD touchscreen interface with intuitive controls
- Multiple measurement modes (single, continuous, timed)
- RS232 and USB connectivity for data transfer
- GMP/GLP compliant with audit trail function
Technical Specifications
| Parameter | Specification |
|---|---|
| Measurement Range | -90° to +90° |
| Accuracy | ±0.01° |
| Repeatability | ±0.005° |
| Light Source | Sodium lamp (589.3nm) or LED multi-wavelength |
| Sample Volume | 1ml to 50ml (standard tube length 100mm, 200mm optional) |
| Temperature Control | 15°C to 40°C (±0.1°C) |
| Power Requirements | 100-240V AC, 50/60Hz |
| Dimensions | 400mm (W) x 300mm (D) x 200mm (H) |
Applications
- Pharmaceutical quality control (sugar content, chiral compounds)
- Food industry (honey purity, sugar concentration)
- Chemical research (optical activity measurement)
- Essential oil analysis
- Academic research and teaching
Polarimeter Maintenance Guidelines
- Keep the instrument in a dry, dust-free environment
- Clean optical surfaces with lens paper only
- Perform monthly calibration checks
- Allow the instrument to warm up for 30 minutes before critical measurements
- Use only manufacturer-approved replacement parts
Polarimeter FAQ
What factors affect Polarimeter measurements?
Several factors can affect Polarimeter measurements: sample temperature (most substances show different optical rotation at different temperatures), wavelength of light (specific rotation varies with wavelength), sample concentration, path length through the sample, and the presence of impurities or other optically active substances in the sample. Our Polarimeters include temperature control and wavelength selection to minimize these variables.
How often should a Polarimeter be calibrated?
Professional laboratories should calibrate their Polarimeter at least monthly using certified reference standards. For critical applications or regulatory environments (like pharmaceuticals), calibration may be required before each measurement session. Our instruments include an automated calibration routine with quartz control plates that simplifies this process and ensures measurement traceability.
What is the difference between manual and automatic Polarimeters?
Manual Polarimeters require the operator to visually determine the null point by rotating the analyzer, while automatic Polarimeters use photoelectric detection to automatically find and measure the rotation angle. Automatic Polarimeters offer better precision (±0.01° vs ±0.05° for manual), faster measurements, and eliminate operator bias. They also typically include digital displays, data storage, and connectivity features that manual instruments lack.
Optional Accessories
- Multiple pathlength sample tubes (50mm, 100mm, 200mm)
- Micro-volume adapter for small samples
- Thermostatic circulation jacket
- Automated sample changer
- Software package for data management
- Carrying case for field use
Polarimeter Measurement Best Practices
- Ensure samples are completely dissolved and free of bubbles
- Select the appropriate wavelength for your application
- Allow temperature-sensitive samples to equilibrate in the sample chamber
- Use high-quality sample tubes with clean, unscratched windows
- Regularly verify instrument performance with reference standards