Yoke DSH-10A Halogen Moisture Analyzer
| Brand | Yoke |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | OEM Manufacturer |
| Model | DSH-10A |
| Maximum Capacity | 10 g |
| Readability | 10 mg |
| Repeatability (3 g sample) | ±0.5% |
| Minimum Sample Mass | 0.5 g |
| Recommended Sample Mass | 3–10 g |
| Heating Temperature Range | 50–180 °C |
| Heating Time Programmable | 1–99 min (1-min increments) |
| Heating Source | Halogen lamp |
| Pan Diameter | 100 mm |
| Display | Backlit dot-matrix LCD |
| Interface | RS-232C |
| End-point Detection | Timed & Automatic |
| Dimensions (W×D×H) | 265 × 160 × 150 mm |
| Net Weight | 5 kg |
| Gross Weight | 6 kg |
| Compliance | ISO 5725 (accuracy & precision), ASTM E1447, USP <921>, GLP-ready data logging |
Overview
The Yoke DSH-10A Halogen Moisture Analyzer is a precision thermal gravimetric instrument engineered for rapid, reliable quantification of free moisture content in solid and semi-solid materials. It operates on the principle of loss-on-drying (LOD), where a precisely weighed sample is subjected to controlled halogen lamp heating, and real-time mass loss is continuously monitored via a high-stability, thermally isolated electromagnetic force compensation sensor. Unlike conventional infrared or convection ovens, the halogen heating element delivers uniform radiant energy with rapid thermal response (typical ramp time to setpoint <60 s), minimizing thermal lag and enabling reproducible drying profiles across diverse matrices—including hygroscopic, thermolabile, or heterogeneous samples. Designed for routine QC/QA laboratories in pharmaceutical, food, chemical, and agricultural sectors, the DSH-10A complies with core regulatory expectations for method validation, traceability, and data integrity under GLP and GMP frameworks.
Key Features
- Backlit dot-matrix LCD display with high contrast and wide viewing angle—optimized for low-ambient-light environments and extended operator use.
- Dedicated membrane keypad with tactile feedback for intuitive navigation and reduced operational error during multi-step workflows.
- Thermally isolated high-resolution weighing cell (10 mg readability) with integrated zero-point drift compensation—ensuring stability under variable ambient conditions.
- Halogen lamp heating system (50–180 °C range) delivering consistent radiant energy distribution across the 100 mm diameter sample pan—eliminating hot spots and enhancing drying homogeneity.
- Real-time drying curve visualization: moisture %, dry weight %, absolute mass, elapsed time, and date are displayed concurrently during analysis.
- Programmable endpoint detection with dual modes: fixed-duration timing or automatic termination based on mass stabilization criteria (e.g., ≤0.1 mg/30 s).
- RS-232C serial interface compliant with standard laboratory peripheral protocols—enabling direct connection to PCs, label printers, or LIMS for automated report generation and audit trail capture.
Sample Compatibility & Compliance
The DSH-10A accommodates a broad spectrum of industrial and research-grade materials, including but not limited to: active pharmaceutical ingredients (APIs), excipients, granules, powdered polymers, cereal grains, mineral ores, herbal extracts, paper pulp, textile fibers, and dried biological tissues. Its 0.5 g minimum sample requirement supports analysis of limited-availability or high-value samples without compromising statistical robustness. All measurement protocols align with internationally recognized standards: ASTM E1447 (standard test method for moisture in solids by thermogravimetry), ISO 5725 (accuracy and precision of measurement methods), and USP “Water Determination”. The instrument’s firmware supports user-defined method storage (up to 20 protocols), password-protected parameter editing, and timestamped result export—meeting foundational requirements for FDA 21 CFR Part 11 compliance when deployed with validated software and procedural controls.
Software & Data Management
While the DSH-10A operates as a standalone analyzer, its RS-232C port enables seamless integration with third-party laboratory data management systems. Raw output includes: sample ID, method name, start/end timestamps, initial/final mass, moisture %, solid %, drying temperature, duration, and stabilization status. When paired with Yoke’s optional PC application (v3.2+), users gain access to graphical drying kinetics plotting, batch report compilation (PDF/CSV), calibration log archiving, and electronic signature support for audit-ready documentation. All data records include embedded metadata (operator ID, instrument serial number, firmware version) to satisfy GLP traceability mandates. No cloud connectivity or proprietary cloud services are implemented—ensuring full local data sovereignty and compatibility with air-gapped lab networks.
Applications
- Pharmaceutical manufacturing: Moisture verification of tablets, capsules, lyophilized powders, and raw excipients per ICH Q5C stability guidelines.
- Food quality control: Rapid assessment of moisture in flour, spices, dairy powders, pet food, and snack products to ensure shelf-life compliance and microbial safety limits.
- Chemical R&D: Quantification of residual solvent or hydrate water in catalysts, pigments, and specialty monomers prior to polymerization or formulation.
- Agricultural testing labs: Field-to-lab determination of grain moisture (wheat, rice, corn) for storage classification and trade compliance (ISO 712).
- Materials science: Monitoring moisture uptake in cellulose-based composites, geotextiles, and desiccant materials under accelerated aging protocols.
FAQ
What is the difference between halogen and traditional infrared moisture analyzers?
Halogen lamps emit a broader, more controllable spectral output (typically 700–1500 nm) compared to narrow-band IR emitters, resulting in faster, more uniform surface and subsurface heating—particularly beneficial for dense or layered samples.
Can the DSH-10A be calibrated for specific materials like starch or lactose?
Yes. Users may store up to 20 custom drying methods, each with unique temperature ramps, hold times, and endpoint criteria—validated against reference Karl Fischer titration results per ASTM E203.
Is the RS-232 interface compatible with modern Windows/macOS systems?
Yes, using standard USB-to-serial adapters (FTDI chipset recommended) and terminal emulation software (e.g., Tera Term, PuTTY) or Yoke’s certified LabLink application.
Does the instrument support GLP-compliant audit trails?
It provides timestamped, operator-tagged result logs and method change history; full GLP compliance requires documented SOPs, periodic verification, and external backup of exported data files.
What maintenance is required to sustain measurement accuracy?
Daily pan cleaning with lint-free cloth, monthly sensor verification using certified weights (Class M2), and annual recalibration by an ISO/IEC 17025-accredited service provider are recommended.
