YDWG SGW®-568 Automated High-Speed Polarimeter

Overview

The YDWG SGW®-568 Automated High-Speed Polarimeter is a precision optical instrument engineered for accurate, repeatable measurement of optical rotation — a fundamental chiroptical property used to characterize optically active substances such as sugars, amino acids, pharmaceuticals, and natural products. Based on the principle of plane-polarized light transmission through chiral media, the instrument employs a high-stability LED light source centered at 589 nm (sodium D-line), coupled with a Glan-Thompson prism polarizer to ensure exceptional polarization purity and angular resolution. Its digital platform architecture eliminates mechanical drift and enhances signal-to-noise ratio, enabling sub-millidegree resolution (0.0001°) and long-term stability. Designed for laboratory environments requiring regulatory compliance and high throughput, the SGW®-568 delivers rapid measurements — averaging 26 seconds per six-cycle acquisition — without compromising metrological integrity. The integrated Peltier temperature control system (10–50 °C, ±0.2 °C accuracy) ensures thermal consistency critical for temperature-sensitive samples, while its ultra-low minimum transmittance threshold (0.01%) accommodates highly absorbing or turbid solutions.

Key Features

• High-resolution angular detection with 0.0001° minimum readout and ±0.003° absolute accuracy, validated per JJG 536–2015 Class 0.01 requirements
• Dual-mode operation: simultaneous support for optical rotation (°), specific rotation ([α]), concentration (g/100 mL), saccharimetric scale (°Z), and user-defined calculation protocols
• Integrated Peltier thermoregulation with real-time temperature monitoring (0–100 °C display range) and precise control over 10–50 °C
• LED-based illumination system with >100,000-hour lifetime and narrowband interference filtering for spectral stability at 589 nm
• Multi-level user management (4-tier password hierarchy, up to 500 users) with electronic signature and full data traceability
• 16 GB internal storage supporting method templates (up to 1,000 pre-programmed assays), audit-ready metadata logging, and export via USB/Ethernet
• Modular hardware design supporting optional upgrades: 21 CFR Part 11-compliant audit trail software, remote PC control via Ethernet, barcode scanning integration (ID-linked data synchronization), and corrosion-resistant thermostatted cells

Sample Compatibility & Compliance

The SGW®-568 accepts standard 100 mm and 200 mm pathlength cells (ambient and temperature-controlled), with optional 50 mm micro-cells for limited-sample applications. Its optical design tolerates low-transmittance samples down to 0.01%, making it suitable for concentrated syrups, viscous extracts, and partially clarified biological fluids. Regulatory alignment includes conformance with Chinese national verification regulation JJG 536–2015 (Class 0.01), and optional firmware/software packages enable full compliance with international quality frameworks: FDA 21 CFR Part 11 (electronic records/signatures), EU Annex 11 (computerized systems), and ISO/IEC 17025 (testing laboratory competence). When configured with the audit trail module, the system provides immutable timestamps, operator ID linkage, change history, and exportable logs required for GMP/GLP audits in pharmaceutical QC and contract research laboratories.

Software & Data Management

Running on embedded Windows OS, the SGW®-568 features an intuitive 8-inch capacitive touchscreen interface with customizable workflows and context-sensitive help. All measurement data — including raw angles, calculated concentrations, temperature logs, calibration records, and operator metadata — are stored with cryptographic integrity. Data export supports CSV, PDF, and XML formats compatible with LIMS integration via Ethernet or USB. Optional audit trail software introduces role-based access control, session locking, and tamper-evident log files meeting ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available). Validation documentation (IQ/OQ/PQ) and on-site compliance support are available upon request for regulated environments.

Applications

This polarimeter serves critical roles across multiple sectors: quantification of sucrose, glucose, and fructose in food and beverage QC; enantiomeric purity assessment of chiral APIs and intermediates in pharmaceutical development; quality control of antibiotics (e.g., penicillins, cephalosporins), vitamins (e.g., ascorbic acid), and plant-derived actives (e.g., camphor, menthol); and routine analysis in academic research on asymmetric synthesis and biomolecular chirality. Its speed, reproducibility, and regulatory adaptability make it particularly suited for high-volume testing labs operating under cGMP, pharmacopoeial monographs (USP , EP 2.2.7), and ISO 8539 standards.

FAQ

What wavelength does the SGW®-568 use for measurement?
The instrument operates at 589 nm using an LED source with a precision interference filter, matching the sodium D-line spectral output required by pharmacopoeial methods.
Can the SGW®-568 be integrated into a LIMS environment?
Yes — it supports native Ethernet connectivity and standardized data export formats (CSV, XML), enabling seamless bidirectional communication with most LIMS platforms.
Is temperature control mandatory for all measurements?
No — ambient-temperature operation is fully supported; however, Peltier-based thermostating is recommended for temperature-dependent assays or when referencing pharmacopoeial specifications requiring controlled conditions.
Does the system support multi-user environments with audit-ready access logs?
Yes — the built-in 4-tier user management system with electronic signatures, session timestamps, and immutable activity logs satisfies GLP/GMP personnel accountability requirements.
What validation support is provided for regulated industries?
YDWG offers IQ/OQ documentation templates, on-site installation qualification, and optional third-party PQ services aligned with ASTM E2500 and GAMP5 guidelines.