Thermobalance L81 Introduction

The current L81 thermal balance design complements our complete selection of thermal analyzers. The L81 has seen many improved designs in its 40 years history. The L81 uses the latest advances in hardware and software to measure independent or one sample simultaneous TGA, DTA and DSC data. The balance hardware is based on a taut bond balance mechanism. The balance arm displacement is detected by highly sensitive inductive transducers. The transducers regulate the current to magnetic coils which compensate for the weight change and keep the balance arm at a constant zero position. The compensation current is proportional to the weight change, This current is amplified and produces a TGA signal. The magnetic coils are also used to electronically tare the system.

The L81 thermal balance can measure data horizontally from -150°C up to 1000°C and vertically from 20°C up to 2400°C. Various sample holders are available depending on sample size, vertical or horizontal measurements, and data output: ex. TGA, DTA, DSC or simultaneous TGA/DTA or TGA/DSC. The balance design supports vacuum, inert or flowing atmosphere. Analysis in a corrosive atmosphere is available with the proper precautions. Precautions include flowing inert gas through the balance mechanism, proper venting, or combustible gas safety system. The system also adapts to residual gas analysis systems using an optional heated capillary. The complete balance is very versatile. New components can be added to change temperature range, measuring design, or data output.