Lasany LI-P703 Touchscreen Automatic Polarimeter with Peltier Temperature Control
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Engineered for temperature-sensitive precision, the Lasany LI-P703 Automatic Polarimeter features built-in Peltier temperature control (15–30°C, ±0.5°C accuracy)—delivering reliable optical rotation measurements without an external water bath. With 0.001° resolution, auto 6-point retesting, and the ability to measure dark-colored samples, it outperforms standard polarimeters. The 7-inch color touchscreen, instant power-on (no preheating), and USB/RS232 connectivity make daily lab operations effortless. ISO 9001:2015 certified and WHO-GMP compliant — built for pharmaceutical, food, and chemical laboratories.
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Description
The Lasany LI-P703 Touchscreen Automatic Polarimeter with Peltier Temperature Control is a sophisticated optical rotation measurement instrument crafted for laboratories that demand both precision and temperature-dependent analysis. Manufactured by Lasany International—an ISO 9001:2015-certified and WHO-GMP-compliant company—the LI-P703 integrates advanced Peltier-based temperature regulation directly into the polarimeter, enabling highly reliable measurements even with thermally sensitive samples. From pharmaceutical chiral compound verification to sugar concentration analysis in food processing, the LI-P703 delivers consistent, reproducible results in a compact and intelligent design that modern laboratories depend on.
Key Features
- Peltier Temperature Control (15–30°C)—Built-in Peltier temperature regulation maintains sample temperature within ±0.5°C accuracy, ensuring measurements are thermally stable and internationally comparable—no external water bath required.
- No Preheating Required — The instrument is ready to measure immediately upon power-on, saving valuable laboratory time and boosting daily productivity.
- Dark Sample Measurement Capability — Unlike conventional polarimeters, the LI-P703 is engineered to accurately measure dark-colored and highly absorbing samples, broadening its application range significantly.
- Automatic 6-Point Retesting with Statistical Analysis — Automatically repeats measurements six times and computes both the average and root mean square (RMS) values, eliminating manual error and enhancing result confidence.
- LED + Interference Filter Light Source at 589 nm—Delivers stable, monochromatic illumination at the sodium D line for internationally standardized optical rotation measurements with long-term reliability.
- 7-Inch Color Touchscreen Display — An intuitive, large-format LCD interface simplifies operation, method selection, and real-time data monitoring for operators at all skill levels.
- Multi-Mode Measurement—Measures Optical Rotation (OR), Specific Rotation, Concentration, and International Sugar Scale (ISS/°Z) within a single, versatile platform.
- RS232 & USB Connectivity — Seamless data transfer to computers, printers, and LIMS systems for efficient documentation and regulatory compliance.
Technical Specifications
| Parameter | Specification |
|---|---|
| Measuring Modes | Optical Rotation, Specific Rotation, Concentration, ISS |
| Light Source | LED + Interference Filter |
| Wavelength | 589 nm (Sodium D Line) |
| Measuring Range | ±45° (OR) / ±120°Z (ISS) |
| Accuracy | ±0.01° (−15° ≤ OR ≤ +15°) / ±0.02° (OR < −15° or OR > +15°) |
| Resolution | 0.001° (OR) / 0.01° Z (ISS) |
| Repeatability | 0.002° (OR) |
| Min. Transmittance | 1% |
| Temperature Control Range | 15–30°C |
| Temperature Accuracy | ±0.5°C |
| Display | 7-inch Color Touch LCD |
| Interfaces | RS232, USB |
| Standard Test Tubes | 100 mm, 200 mm (regular) / 100 mm (temp. control) |
| Power Supply | 220V ±22V, 50Hz ±1Hz, 200W |
| Package Dimensions | 820 mm × 500 mm × 510 mm |
| Gross Weight | 37 kg |
Applications
The LI-P703 automatic polarimeter with Peltier temperature control serves a broad range of critical industries:
- Pharmaceutical & Biotech — Confirming enantiomeric purity and chiral integrity of APIs and drug intermediates under controlled temperature conditions as per pharmacopoeia standards.
- Sugar & Beverage Industry — Determining sucrose, fructose, and glucose concentrations using the International Sugar Scale for quality control and process monitoring.
- Food Science & Agro-processing—Testing optical activity of honey, syrups, starches, and natural extracts with temperature-sensitive accuracy.
- Chemical & Fine Chemical Manufacturing — Analyzing chiral compounds, amino acids, and optically active reagents in R&D and production QC settings.
- Academic Research & Teaching Labs — Conducting advanced polarimetry experiments in stereochemistry, biochemistry, and natural products research with precise temperature control.
- Essential Oils & Flavor Industry—Verifying the optical rotation of temperature-sensitive terpenes and botanical extracts for authentication and compliance.
Why Choose the Lasany LI-P703?
The LI-P703 stands apart from standard automatic polarimeters through one defining advantage: integrated Peltier temperature control. Many optical rotation values — particularly for pharmaceutical and natural product applications — are temperature-dependent. Without proper thermal regulation, measurements can vary significantly between laboratories and conditions. The LI-P703 eliminates this uncertainty by maintaining your sample at a precise, stable temperature throughout every measurement cycle.
Combined with its ability to measure dark-colored samples, its no-preheat instant start, and its automatic six-repetition statistical analysis, the LI-P703 reduces both operator workload and the risk of erroneous results. Its 0.001° resolution and tight repeatability of 0.002° place it among the most accurate instruments in its segment.
Backed by ISO 9001:2015 quality management and WHO-GMP compliance, Lasany International ensures every LI-P703 unit meets the highest standards of manufacturing quality. With robust RS232 and USB interfaces, the instrument integrates smoothly into regulated laboratory environments that require audit trails and data integrity.










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