DSH-50A Halogen Moisture Analyzer

Overview

The DSH-50A Halogen Moisture Analyzer is a precision thermal gravimetric instrument engineered for rapid, reliable quantification of free and surface-bound moisture in solid and semi-solid materials. It operates on the loss-on-drying (LOD) principle: a halogen heating element uniformly irradiates the sample, driving off volatile moisture under controlled thermal conditions; mass loss is continuously monitored via a high-stability electromagnetic force compensation balance. The system calculates moisture content (%) as the ratio of mass loss to initial sample mass, with real-time display of moisture %, solids %, residual weight, elapsed time, and date stamp. Designed for routine QC/QA environments—including pharmaceutical manufacturing, food processing, chemical R&D, and agricultural testing—the DSH-50A delivers traceable, repeatable results without requiring solvent extraction or Karl Fischer titration. Its halogen lamp offers faster thermal response and more uniform heating profiles than traditional infrared or convection ovens, significantly reducing average test duration while maintaining thermal stability across the 50–180 °C operating range.

Key Features

• High-resolution backlit dot-matrix LCD display—optimized for low-ambient-light laboratory conditions and ergonomic readability during extended operation.
• Intuitive membrane keypad interface—designed for glove-compatible, tactile feedback operation in cleanroom or production-floor settings.
• Thermally isolated high-precision weighing sensor—minimizes drift from thermal conduction and ensures stable baseline acquisition before and during drying cycles.
• Adjustable halogen heating module—provides rapid, controllable thermal energy delivery with programmable ramp profiles (standard mode only) and precise temperature setpoint resolution (±1 °C).
• Auto-tare functionality with zero-point drift correction—enables sequential multi-sample analysis without manual re-zeroing, improving throughput and measurement consistency.
• Real-time drying status monitoring—displays dynamic mass change rate and estimates remaining drying time based on current evaporation kinetics, supporting informed endpoint decisions.

Sample Compatibility & Compliance

The DSH-50A accommodates a broad spectrum of non-volatile, thermally stable matrices, including but not limited to: granular pharmaceutical excipients (e.g., lactose, microcrystalline cellulose), milled cereal grains and oilseeds, powdered polymers, mineral ores, dried botanicals, paper pulp, and textile fibers. It is not suitable for samples containing volatile solvents, low-boiling-point organics, or thermally labile compounds that decompose below 180 °C. While the instrument itself does not carry CE, UKCA, or FDA 510(k) certification, its operational methodology aligns with ASTM D4442 (Standard Test Methods for Direct Moisture Content of Wood and Wood-Based Materials), ISO 712 (Cereals and cereal products — Determination of moisture content), and USP (Water Determination). Data integrity is supported through RS-232C serial output, enabling integration into validated LIMS or ELN platforms compliant with 21 CFR Part 11 when paired with appropriate audit-trail software.

Software & Data Management

The DSH-50A features native RS-232C serial communication (no USB or Ethernet), permitting direct connection to external PCs or thermal printers for raw data logging. Output includes timestamped records of initial mass, final mass, moisture %, solids %, drying time, and user-defined ID fields. When interfaced with compliant third-party software (e.g., LabSolutions, WinCT-Moisture, or custom Python/Excel VBA scripts), the device supports automated report generation, statistical process control (SPC) charting, and electronic signature workflows aligned with GLP and GMP documentation requirements. All internal memory retains up to 99 method protocols—including temperature setpoints, timer values, and display preferences—with password-protected access to prevent unauthorized configuration changes.

Applications

• Pharmaceutical raw material release testing per ICH Q5C stability guidelines, verifying moisture thresholds prior to tablet compression or lyophilization.
• In-process moisture verification of wet granules during fluid-bed drying, ensuring optimal binder activation and minimizing over-drying defects.
• Quality control of hygroscopic food ingredients (e.g., starches, whey powders, coffee extracts) to prevent caking, microbial growth, or Maillard reaction acceleration.
• Mineral processing labs assessing ore moisture content pre-crushing to optimize energy consumption and downstream separation efficiency.
• Academic research labs conducting comparative desorption kinetics studies across biomass feedstocks under standardized thermal protocols.

FAQ

What is the recommended calibration frequency for the DSH-50A?

We recommend daily verification using certified stainless-steel test weights (e.g., 10 g and 50 g) prior to first use, and full calibration every 30 days or after any mechanical shock or environmental relocation. Internal calibration routines are accessible via service menu.
Can the DSH-50A measure bound water or crystalline hydrates?

No. The instrument quantifies only free and loosely adsorbed moisture. Bound water or water of hydration requires higher thermal energy or alternative methods (e.g., Karl Fischer coulometry or TGA-MS coupling).
Is the halogen lamp replaceable by the user?

Yes. The halogen lamp is a field-replaceable consumable with standard M10 thread mounting; replacement kits include lamp, reflector shield, and alignment jig—no tools required.
Does the DSH-50A support method validation per ICH Q2(R2)?

The hardware provides the necessary repeatability and linearity foundations; however, full analytical method validation—including specificity, accuracy, LOD/LOQ, and robustness—must be performed in-house per your organization’s SOPs and regulatory obligations.