Leici SFS-101S Halogen Moisture Analyzer
| Brand | Leici |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | SFS-101S Halogen Moisture Analyzer |
| Price Range | USD 720 – 1,430 (FOB) |
| Weighing Range | 0.2 g to 110 g |
| Readability (d) | 1 mg |
| Verification Scale Interval (e) | 10 mg |
| Moisture Readability | 0.01% |
| Accuracy Class | Class II (per OIML R76) |
| Minimum Sample Mass | 1 g |
| Heating Source | Circular Halogen Lamp |
| Temperature Control Range | Ambient to 180 °C |
| Heating Chamber Material | Heat-Resistant Engineering Plastic |
| Sample Pan Diameter | 90 mm |
| Real-Time Display | Temperature, Elapsed Heating Time, Dynamic Moisture %, Dry Matter %, ATRO Dry Basis %, ATRO Wet Basis % |
| Drying Modes | Standard, Quick |
| Termination Modes | Automatic (moisture change rate threshold), Manual, Semi-Automatic |
| Interface | RS-232 Serial Port for Thermal Printer Output |
| Power Supply | 220 V ± 10%, 50/60 Hz |
| Dimensions (W×D×H) | 310 × 180 × 157 mm |
| Net Weight | 2.6 kg |
Overview
The Leici SFS-101S Halogen Moisture Analyzer is a precision laboratory instrument engineered for rapid, gravimetric determination of moisture content in solid and semi-solid materials. It operates on the principle of loss-on-drying (LOD), where sample mass is measured before and after controlled thermal drying using a high-efficiency circular halogen lamp. This heating method delivers uniform radiant energy distribution across the sample surface—minimizing thermal gradients and reducing measurement variability compared to conventional infrared or convection-based dryers. Designed for routine quality control and process validation environments, the SFS-101S complies with fundamental requirements outlined in ASTM D4442, ISO 712, and USP <921> for moisture analysis, supporting both research-grade reproducibility and production-floor robustness.
Key Features
- High-resolution 1 mg readability balance integrated with halogen heating system, enabling precise LOD calculation with 0.01% moisture resolution
- Circular halogen lamp (ambient to 180 °C adjustable) ensures consistent irradiance and faster thermal response than traditional quartz-tube heaters
- Intuitive LCD interface with multilingual menu support (English default), displaying real-time temperature, elapsed time, and dynamic moisture/dry matter percentages
- Three endpoint detection modes: automatic (programmable Δm/Δt threshold), manual (user-defined time), and semi-automatic (combined time + stability criteria)
- Four reporting formats: moisture % (w/w), dry matter %, ATRO dry basis %, and ATRO wet basis % — configurable per test protocol
- Comprehensive operational safeguards: audible/visual alerts for lid-open events, out-of-range temperature deviation, and low-sample-mass conditions (<1 g)
- RS-232 serial interface compliant with standard printer protocols (ESC/POS), enabling direct hardcopy output of full test records including timestamps and operator IDs
Sample Compatibility & Compliance
The SFS-101S accommodates a broad range of non-volatile and thermally stable matrices—including pharmaceutical powders, food ingredients, polymers, ceramics, and agricultural commodities—provided samples remain chemically inert below 180 °C. Its plastic heating chamber (UL94 V-0 rated engineering polymer) ensures electrical safety and resistance to incidental chemical exposure during routine cleaning. The instrument meets OIML R76 Class II accuracy specifications for non-automatic weighing instruments and supports audit-ready workflows under GLP and GMP frameworks. While not 21 CFR Part 11–certified out-of-the-box, its RS-232 logging capability enables integration with validated LIMS or ELN systems that enforce electronic signature and audit trail requirements.
Software & Data Management
No proprietary PC software is bundled; data export relies on standardized ASCII transmission via RS-232 at 9600 baud (8N1). Each printout includes: date/time stamp, model number, sample ID (user-entered), initial/final mass, temperature setpoint, drying mode, termination mode, and all four calculated moisture metrics. For laboratories requiring structured digital archiving, third-party serial capture tools (e.g., Tera Term, LabVIEW VISA) can be deployed to parse and timestamp incoming data streams into CSV or SQL databases. All configuration parameters—including temperature ramp profiles, hold times, and display units—are stored in non-volatile memory and retained after power cycling.
Applications
- Pharmaceutical QC: Assay of residual solvents in active pharmaceutical ingredients (APIs) and excipients per ICH Q5C guidelines
- Food Safety Labs: Moisture verification in flour, dairy powders, spices, and pet food to meet FDA 21 CFR 117 HACCP controls
- Materials Science: Polymer drying validation prior to extrusion or injection molding
- Agricultural Testing: Grain moisture assessment aligned with ISO 6540 and AOAC 952.07 methodologies
- Academic Research: Teaching gravimetric principles and calibration traceability in analytical chemistry labs
FAQ
What is the recommended calibration frequency for the SFS-101S?
We recommend daily zero calibration and weekly span calibration using certified weights traceable to NIST or equivalent national metrology institutes.
Can the SFS-101S measure volatile organic compounds (VOCs) selectively?
No. As a gravimetric LOD instrument, it reports total volatile loss—not compound-specific volatiles. For VOC identification, GC-MS or headspace-GC is required.
Is the halogen lamp replaceable by the end user?
Yes. The lamp is a field-replaceable module with standardized socket interface; replacement requires no recalibration.
Does the instrument support password-protected method storage?
No. Method parameters are stored in volatile RAM and cleared on power loss; users must re-enter settings or maintain external documentation.
What maintenance is required beyond lamp replacement?
Monthly cleaning of the pan and chamber interior with lint-free cloth and isopropyl alcohol; annual verification of temperature sensor drift against a calibrated reference thermometer.
