LECO TGA701 Thermogravimetric Analyzer
| Origin | USA |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | TGA701 |
| Pricing | Available Upon Request |
Overview
The LECO TGA701 Thermogravimetric Analyzer is a precision-engineered instrument designed for high-reproducibility quantitative thermal decomposition analysis under controlled atmospheric conditions. It operates on the fundamental principle of thermogravimetry—measuring real-time mass change of a sample as a function of temperature or time in a defined gas environment. The system employs a high-stability microbalance coupled with a programmable furnace capable of precise linear and isothermal temperature ramps up to 1000 °C. Its core architecture integrates electromagnetic force compensation weighing technology, ensuring sub-milligram resolution and long-term baseline stability essential for regulatory-compliant thermal characterization. The TGA701 is widely deployed in coal quality laboratories, agricultural testing facilities, materials R&D centers, and industrial QC labs where standardized determination of moisture, ash, volatile matter, and fixed carbon—per ASTM D3172, D3173, D3174, D3175, and ISO 1171—is required.
Key Features
- High-accuracy thermogravimetric measurement across a temperature range of ambient to 1000 °C, with ±0.5 °C accuracy and <±0.1 °C reproducibility over full scale
- Configurable single- or dual-furnace modules enabling parallel analysis of up to two independent samples per run
- Pneumatically actuated carousel system minimizing mechanical vibration transmission to the analytical balance, thereby enhancing mass stability and positional repeatability
- Programmable atmosphere control supporting inert (N₂), oxidizing (O₂), or ambient air environments with mass flow-controlled gas switching and purge sequencing
- Sample capacity of 0.5–5.0 g per crucible, optimized for heterogeneous solid matrices including coal, biomass, soils, minerals, ceramics, and polymer composites
- Integrated method editor supporting multi-step thermal protocols—including ramp-hold-ramp sequences, dynamic/isothermal modes, and derivative (DTG) calculation
- Robust hardware design compliant with electromagnetic compatibility (EMC) standards IEC 61326-1 and safety standard IEC 61010-1
Sample Compatibility & Compliance
The TGA701 accommodates a broad spectrum of solid and powdered materials—from high-volatility organics to refractory inorganics—without requiring derivatization or pre-treatment. Its crucible geometry and furnace uniformity support consistent thermal exposure for heterogeneous samples such as coal blends, fertilizers, cereal grains, marine sediments, and metallurgical ores. Method validation and reporting align with internationally recognized standards including AOAC Official Methods of Analysis (e.g., AOAC 925.04, 925.10), AACC International Approved Methods (e.g., AACC 44-19A), ASTM E1131 (standard test method for compositional analysis by thermogravimetry), and ISO 11358 (plastics—thermogravimetry). Instrument qualification documentation supports GLP and GMP environments, with full audit trail functionality meeting FDA 21 CFR Part 11 requirements for electronic records and signatures.
Software & Data Management
The TGA701 is operated via LECO’s proprietary ThermoSoft™ software, a Windows-based platform offering intuitive method development, real-time data visualization, and automated report generation. The software includes built-in calibration wizards for temperature and mass verification, customizable pass/fail criteria for specification-driven QA/QC workflows, and export options for CSV, XML, and PDF formats. All user actions—including method edits, run initiation, parameter adjustments, and result approvals—are logged with timestamped, user-identified entries. Electronic signatures, role-based access control, and encrypted database storage ensure compliance with data integrity principles outlined in ALCOA+ (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available).
Applications
- Determination of proximate analysis parameters in coal and coke per ASTM D3172 and ISO 17246
- Quantification of moisture content in cereals, feedstuffs, and pharmaceutical excipients
- Residue-on-ignition (ROI) and ash content assessment in soils, slags, and catalysts
- Thermal stability profiling of polymers, composites, and battery electrode materials
- Decomposition kinetics studies for ceramic precursors and metal-organic frameworks (MOFs)
- Volatiles-to-ash ratio evaluation in biochar and agricultural residues
FAQ
What standards does the TGA701 support for coal proximate analysis?
ASTM D3172, D3173, D3174, D3175; ISO 1171, ISO 17246; and GB/T 212 (for reference alignment in international labs).
Can the TGA701 perform simultaneous dual-sample analysis?
Yes—optional dual-furnace configuration enables independent, concurrent thermogravimetric runs with full method autonomy per channel.
Is the software validated for 21 CFR Part 11 compliance?
ThermoSoft™ includes full electronic signature capability, audit trail logging, and secure user authentication—validated for FDA-regulated environments.
What crucible materials are compatible with the TGA701?
Standard alumina, platinum, and nickel crucibles are supported; custom geometries available for specialized applications.
How is temperature calibration verified on the TGA701?
Using certified reference materials (e.g., Ni, Cu, Al, and KCl) traceable to NIST SRMs, with automated calibration reporting integrated into ThermoSoft™.
