Thermogravimetric Moisture, Ash, Volatiles, and Loss-on-Ignition

Automated Macro Thermogravimetric Analysis

The LECO TGA801 Macro Thermogravimetric Analyzer delivers precise, high-throughput determination of moisture, ash, volatile content, and loss-on-ignition (LOI) across a wide range of organic and inorganic materials. Built with a rugged design that includes an integrated four-place balance and advanced furnace control, it ensures accurate gravimetric analysis while eliminating the inefficiencies of traditional manual methods.

With automated analysis, flexible method settings, macro sample size (nominally 1g), and batch capacity for up to 19 samples, the TGA801 streamlines workflows, reduces labor, and improves consistency—empowering laboratories to achieve reliable results faster and with fewer user interactions.

Maximize your laboratory’s throughput across diverse industries with the TGA801—engineered to handle everything from heavy industrial materials like coal and cement to sensitive food, feed, and environmental matrices. Its compliance with ASTM standards and intuitive Cornerstone software makes it an ideal solution for labs seeking efficiency without compromising precision.

How the TGA801 Works

Analysis begins when samples have been logged, and empty crucibles have been loaded into the sample carousel. After empty crucible weights have been automatically recorded, the user is prompted to load samples. Once loaded, sample weights are recorded, and the method-specified furnace-temperature program begins.   

Temperature, temperature ramp rate, atmosphere (compressed air, N₂, or O₂), and duration (fixed time or mass constancy) are selectable for each method step. Moisture, volatile, and ash steps are most commonly utilized and are available as preset method steps.  

The mass change of each sample is sequentially monitored throughout an analysis. Crucibles are automatically indexed to the position above (and lowered onto) the balance pedestal where sample weights are recorded. Percent mass change is typically reported at the end of each step; although alternative and additional calculations can be specified by the user in the method.  

An external PC with LECO Cornerstone software manages all quantitative calculations and stores the data for review, report generation, or export to LIMS.

Instrument Support

Ensure reliable instrument performance with extensive support, training, and maintenance services. Need tailored support for your thermogravimetric analyzers? Our experts are standing by.