Yoke DSH-10A Halogen Moisture Analyzer

Overview

The Yoke DSH-10A Halogen Moisture Analyzer is a precision loss-on-drying (LOD) instrument engineered for rapid, gravimetric determination of moisture content in solid and semi-solid samples. It operates on the fundamental principle of thermogravimetry: a halogen lamp provides uniform, controllable radiant heating to dehydrate the sample, while a high-stability electromagnetic force compensation sensor continuously monitors mass loss with microgram-level resolution. The system calculates moisture percentage in real time by comparing initial mass, final dried mass, and the rate of mass change—enabling objective endpoint detection without reliance on arbitrary time-based termination. This method aligns with internationally recognized standard test procedures including ASTM E1447, ISO 5725-2 (trueness and precision), and USP for Loss on Drying, making the DSH-10A suitable for quality control laboratories operating under GLP or GMP frameworks.

Key Features

• Halogen lamp heating system delivering rapid thermal response (0–160 °C in <15 s) and precise temperature control (±1 °C stability), minimizing thermal degradation of heat-sensitive materials such as pharmaceutical actives or enzyme-rich biological powders.
• High-resolution backlit dot-matrix LCD display optimized for ambient light variability—ensuring legibility in low-light production environments or controlled laboratory settings.
• Electromagnetic force compensation weighing sensor with integrated zero drift compensation algorithm, maintaining calibration integrity during extended operation cycles and across ambient temperature fluctuations (10–30 °C).
• Intuitive membrane keypad interface supporting one-touch tare, manual temperature/time setup, and real-time drying curve visualization—including dynamic dryness status indication and projected endpoint estimation based on first-derivative mass loss kinetics.
• RS-232C serial interface compliant with standard ASCII command protocols, enabling direct integration with LIMS, statistical process control (SPC) software, or thermal printer peripherals for audit-ready documentation.

Sample Compatibility & Compliance

The DSH-10A accommodates heterogeneous sample types within a 10 g maximum capacity, including granular polymers, milled pharmaceutical excipients, ground cereals, mineral concentrates, lyophilized biologics, cellulose-based packaging substrates, and textile fibers. Its open-sample pan design facilitates rapid loading and residue removal, supporting routine analysis of high-volume QC batches. All measurement protocols adhere to ISO/IEC 17025 traceability requirements when paired with certified reference standards (e.g., sodium tartrate dihydrate for moisture calibration verification). The instrument’s firmware architecture supports user-defined method storage (up to 20 profiles), each configurable with target temperature, hold time, drying mode (standard/ramp), and auto-stop criteria (mass change threshold or time limit)—ensuring method consistency across shifts and operators.

Software & Data Management

While the DSH-10A operates as a standalone unit, its RS-232C port enables bidirectional communication with external PCs running validated data acquisition software. Raw output includes timestamped mass readings at 1-second intervals, calculated moisture %, drying rate (mg/s), and endpoint confirmation flags. When interfaced with compliant laboratory software, the device supports FDA 21 CFR Part 11–aligned audit trails—including operator ID logging, parameter change history, and electronic signature capture for method execution records. Data export formats include CSV and TXT, compatible with Excel-based trending, ANOVA for inter-method comparison, and SPC charting per ISO 7870-2.

Applications

• Pharmaceutical manufacturing: LOD testing of API batches and excipients per ICH Q5C stability guidelines.
• Food processing: Moisture verification in flour, starch, dairy powders, and snack substrates to ensure shelf-life compliance and microbial safety limits.
• Chemical synthesis: Quantification of hydrate water in catalysts, metal salts, and fine chemical intermediates prior to reaction staging.
• Materials science: Characterization of hygroscopicity in lithium-ion battery cathode precursors and polymer resins.
• Agricultural QA: Rapid field-deployable screening of grain moisture (wheat, corn, soybean) against ISO 6540 specifications.

FAQ

What standards does the DSH-10A comply with for moisture analysis?
It supports methodology alignment with ASTM E1447, ISO 5725, USP , and EP 2.5.12—though formal certification requires user-performed validation per ISO/IEC 17025.
Can the DSH-10A be used for volatile organic compound (VOC) quantification?
No—it measures total volatile loss as moisture-equivalent; dedicated GC or Karl Fischer titration is required for selective VOC or bound-water differentiation.
Is calibration traceable to national metrology institutes?
Yes—when calibrated using NIST-traceable weights and certified moisture standards (e.g., IRMM-801), full traceability is achievable per ISO/IEC 17025 Clause 6.6.
Does the instrument support GLP-compliant data archiving?
Direct archiving requires external software with 21 CFR Part 11 functionality; the DSH-10A provides all necessary raw data streams and event timestamps for integration.
What maintenance is required for long-term accuracy?
Bi-weekly cleaning of the halogen lamp reflector and sample pan, quarterly sensor sensitivity verification using certified test masses, and annual full recalibration by an accredited service provider.