Yoke DSH-10A Halogen Moisture Analyzer

Overview

The Yoke DSH-10A Halogen Moisture Analyzer is a precision thermogravimetric instrument engineered for rapid, reliable moisture content determination in solid and semi-solid samples across pharmaceutical, food, chemical, and materials laboratories. It operates on the loss-on-drying (LOD) principle: a halogen lamp delivers uniform, controllable radiant heat to the sample, driving off volatile components—primarily water—while an integrated high-stability weighing sensor continuously monitors mass loss in real time. Unlike traditional infrared or convection ovens, halogen heating enables faster thermal response, narrower temperature gradients across the sample surface, and improved energy efficiency. The analyzer’s design prioritizes operational robustness and measurement reproducibility under routine QC/QA workflows, with full compliance to core thermogravimetric methodology standards referenced in ASTM E1447, ISO 11885, and USP <921>.

Key Features

• Halogen lamp heating system with programmable temperature control (50–180 °C in 1 °C increments), enabling method-specific drying profiles for diverse sample matrices.
• High-resolution backlit dot-matrix LCD display (128 × 64 pixels) optimized for low-ambient-light environments and extended operator use.
• Dedicated membrane keypad with tactile feedback for intuitive navigation—no touchscreen dependency, ensuring long-term reliability in dusty or humid lab settings.
• Thermally isolated load cell architecture minimizes thermal drift during active heating, maintaining 10 mg readability throughout the drying cycle.
• Two endpoint detection modes: user-defined timed drying and auto-termination based on mass change rate (e.g., ≤0.1 mg/30 s), supporting both standardized and application-optimized protocols.
• RS232 serial interface compliant with standard laboratory data acquisition systems, facilitating integration into LIMS or custom reporting software via ASCII-based command protocol.

Sample Compatibility & Compliance

The DSH-10A accommodates a broad range of non-volatile, non-hygroscopic, and thermally stable materials—including powders, granules, pellets, pastes, and thin films—within its 0.5–10 g recommended mass window. Its 100 mm stainless-steel sample pan provides adequate surface area for even heat distribution and avoids edge overheating artifacts common in smaller pans. While not certified for GLP/GMP environments out-of-the-box, the instrument supports audit-ready operation when paired with validated SOPs and external calibration records per ISO/IEC 17025 requirements. All firmware-generated data (moisture %, solids %, final weight, timestamp) are traceable and exportable, aligning with basic FDA 21 CFR Part 11 data integrity expectations when used with compliant host software.

Software & Data Management

The DSH-10A operates autonomously without proprietary PC software. All method parameters (temperature setpoint, duration, endpoint mode) are configured directly on-device and stored in non-volatile memory for recall. Measurement results—including intermediate weight readings at user-defined intervals—are displayed in real time and retained in internal memory for up to 99 test records. Data export via RS232 follows a fixed ASCII format: “ID,Moisture%,Solid%,Initial_Wt(g),Final_Wt(g),Time(min),Date,Temp(°C)”, enabling seamless ingestion into Excel, LabArchives, or enterprise QA databases. Optional third-party drivers support automated logging and statistical process control (SPC) charting when connected to Windows-based workstations.

Applications

• Pharmaceutical raw material qualification per USP <921> and EP 2.2.32, including excipients (lactose, microcrystalline cellulose) and active pharmaceutical ingredients (APIs).
• Food quality control: moisture verification in flour, spices, dairy powders, coffee beans, and pet food to ensure shelf-life stability and regulatory labeling accuracy.
• Chemical manufacturing: batch release testing of catalysts, resins, and inorganic salts where residual solvent or hydration water impacts reactivity or storage safety.
• Plastics and polymer processing: monitoring hygroscopicity of nylon, PET, and polycarbonate pellets prior to extrusion or injection molding.
• Academic research labs requiring rapid, repeatable LOD screening for method development or comparative hygroscopicity studies.

FAQ

Does the DSH-10A comply with ISO 11885 or ASTM E1447?
Yes—the instrument implements the fundamental thermogravimetric LOD methodology described in these standards. Full compliance requires user-defined validation (e.g., repeatability, linearity, recovery) per laboratory SOP.
Can I calibrate the balance and temperature independently?
Yes—internal balance calibration uses external weights (not included); temperature verification requires a calibrated NIST-traceable thermometer placed in direct contact with the pan surface during stabilization.
Is the halogen lamp replaceable by the user?
Yes—the lamp module is field-serviceable with standard tools and has a rated lifetime of ≥5,000 hours under typical usage conditions.
What is the warm-up time before first measurement?
Less than 60 seconds from power-on to stable thermal baseline, verified by internal self-diagnostic routines.
Does the unit support multi-step heating programs?
No—the DSH-10A executes single-stage heating only. Multi-ramp protocols require external programmable controllers or higher-tier models (e.g., DSH-20 series).