Introduction
A manual polarimeter is an optical instrument used to measure the angle of rotation of plane-polarized light caused by an optically active substance, and it is a traditional but reliable instrument used in chemistry, pharmacy, and the food industry to determine the concentration, purity, and identity of optically active compounds. In operation, light from a source, such as a sodium lamp, is passed through a polarizer to produce plane-polarized light, which then passes through a sample cell containing the solution of the optically active substance; if the substance is optically active, it rotates the plane of polarization, and the operator rotates the analyzer, a second polarizer, to restore the light to its minimum or maximum intensity, and the angle of rotation is read from a graduated scale, and this measured rotation is used with the path length and the specific rotation of the substance to calculate the concentration of the solution. Manual polarimeters are simple, robust, and do not require electricity for the measurement itself, and they are available with various scales and sample cell lengths, and they can measure samples with single or multiple wavelengths by using different light sources. They are used in the pharmaceutical industry for quality control of chiral drugs and raw materials, for determining the purity and optical activity of compounds, and for verifying the concentration of solutions; in the sugar and food industry for measuring the sugar content of syrups, juices, and other products; in the chemical industry for characterizing optically active compounds; in education for teaching optics and analytical chemistry; and in research for studying stereochemistry. Manual polarimeters are straightforward to operate and maintain, with features such as readable scales and interchangeable cells, and they provide accurate measurements when operated carefully by an experienced user. With their reliability and simplicity, manual polarimeters remain useful instruments for optical rotation measurement.
Manual Polarimeter LPMR-T2010
Manual Polarimeter with with 589 nm filter works as light source. This analytical equipment is designed to meet the rigorous requirements of modern laboratory operations, ensuring high p...
Manual Polarimeter LPMR-T2012
Manual Polarimeter with 7 inch touch screen display is upgraded to ± 89.99° and ±259°Z scope of measurement. With four types of optical measurements, it determines concentration, con...
Manual Polarimeter LPMR-T2010
Polorimeteter is an optical instruments which comes with 589nm standard sodium lamp and (-180) °C to 180 °C measurement range for determining the concentration of the optical active su...
Manual Polarimeter LPMR-T2011
Manual Polarimeter with with 589 nm filter works as light source. This analytical equipment is designed to meet the rigorous requirements of modern laboratory operations, ensuring high p...
Standards
GB/T 613-2007-Chemical reagent-General method for the determination of specific optical rotation
Complies with the above standards, but is not limited to them.
Features
1. Manual polarimeter for visual measurement of optical rotation of substances.
2. Classic visual null-point measurement with precision scale for educational and routine use.
3. Suitable for educational laboratories, sugar industry, pharmaceutical and chemical teaching.
4. Includes polarimeter body, sample tube, sodium lamp, scale and operation manual.
5. Simple, reliable operation without electronics for fundamental polarimetric measurement.
FAQ
Q1: What testing scenarios is this polarimeter mainly applied to?
A: The manual polarimeter is used in educational institutions, sugar industry, pharmaceutical teaching laboratories, chemical analysis and training facilities to measure optical rotation of optically active substances through visual null-point observation. It supports educational demonstrations and teaching of optical activity and polarimetry, sugar content measurement in sugar industry and food testing, pharmaceutical product optical rotation testing in teaching and routine settings, chemical compound characterization, and technician training. The manual visual design provides direct, hands-on measurement experience, making it ideal for educational purposes and routine measurements where electronic automation is not required. It is essential for educational laboratories, training facilities, sugar testing and routine quality control requiring optical rotation measurement through the classic manual method, where the visual null-point technique provides a reliable, educational, cost-effective approach to measuring optical activity for teaching, sugar analysis, pharmaceutical testing and chemical characterization in academic and industrial settings.
Q2: What standards does the polarimeter comply with?
A: The manual polarimeter supports methods referenced in pharmacopoeial monographs for optical rotation, ICUMSA for sugar, and relevant GB/T standards. The hardware complies with relevant laboratory safety standards. Calibration should use certified quartz reference plates traceable to international standards. Accuracy may be lower than automatic models due to visual reading.
Q3: What is the warranty period for the whole machine and key components?
A: The whole polarimeter is covered by a 12-month warranty. The optical system, scale and body are covered, while sample tubes, lamps and quartz plates are accessories or consumables. Damage from improper use, dropping or unauthorized repair is excluded.
Q4: Is this device difficult to operate? Is professional training required?
A: Operation requires training in visual polarimetric measurement technique including null-point observation and scale reading. We provide an operation manual and remote guidance. Proper sample tube filling, lamp warm-up, null-point adjustment and scale reading are important for accurate measurements. Operator visual acuity affects results.
Q5: What is the typical lead-time for order delivery?
A: Standard models require 7-30 working days. In-stock units can ship within 3-7 working days. Custom configurations or large built-to-order systems may require additional time, and we confirm the exact schedule before order confirmation.
Q6: Is regular calibration required? What is the recommended calibration cycle?
A: Calibration with certified quartz reference plates recommended every 6-12 months. Routine verification with a standard before critical measurements. Lamp intensity and condition checked periodically. Sample tube condition verified. Optical surfaces cleaned regularly.
Q7: Are supporting consumables universal?
A: Sample tubes, sodium lamps and quartz calibration plates are available from laboratory suppliers, though compatibility should be verified. Long-term consumable cost is low.
Q8: Can I customize parameters or supporting accessories?
A: Customization includes scale range, accuracy, sample tube size, lamp type and accessories. Additional sample tubes, quartz plates and lamps can be ordered separately. Custom orders extend delivery lead-time.
Q9: Does the purchase include on-site installation and commissioning service?
A: No complex installation is required beyond setup and lamp connection. The package includes the polarimeter, sample tube and instruction manual. On-site service is not included for this type of educational instrument.
Q10: What types of samples are compatible with this equipment?
A: The manual polarimeter measures optical rotation of clear, transparent liquids and solutions within the concentration and path length specification. Turbid or highly colored samples may make visual null-point observation difficult. Users should select appropriate sample tube path length, ensure bubble-free sample filling, allow proper lamp warm-up, perform careful null-point adjustment to minimize visual reading error, calibrate with certified quartz plates, use proper solvent blanks, and report results with complete measurement conditions. The manual visual method has inherent operator-dependent variability, so consistent technique and multiple readings are recommended for reliable results. The instrument should be used in a dimly lit area for optimal visual observation of the null point.
Tips: For more details, quotes and customized solutions, please contact us anytime. We’re always ready to serve you professionally.