The 820HT Series features a high-sensitivity optical encoder joined to two high-temperature furnace options.
It operates at high temperatures in a vertical orientation, making it uniquely set up for sintering analysis, studies in Rate Controlled Sintering (RCS) mode, and the determination of dilatometric parameters for samples that are otherwise impossible to analyze correctly on classic horizontal dilatometers.
Available in two different models (DIL 821HT and DIL 822HT), both units feature the new optical encoder with 1 nm resolution. When combined with the True Differential of the DIL822HT, the result is simply the best possible sensitivity and CTE accuracy in the high-temperature segment.
Unlike in horizontal dilatometry, the vertical design does not require the sample to be supported. The specimen stands free on the bottom plate, and the pushrod is loaded on its tip.
The vertical configuration is particularly well suited for sintering studies and for samples that are difficult, if not impossible, to measure with horizontal pushrod dilatometers, such as powder samples and samples that, during the test, develop a vitreous phase that would lead the sample to interact with the sample holder and generate friction. This is a major source of error in the measurement of dilatometric parameters.
Equipped with a linear motor able to generate a constant force throughout the experiment, DIL 821HT and DIL 822HT ensure that contact with the sample is maintained linearly and with the lightest possible force, regardless of the dimensional change.