DIL 802 Differential Dilatometer from TA Instruments

上海仪舶实验室自动化 25-01-23 16:57:19

DIL 802 Differential Dilatometer from TA Instruments

TA Instruments’ DIL 802/802L differential horizontal dilatometer has been specifically designed to provide accurate differential measurement. It measures the difference between the sample and the inert reference.

The design of the DIL 802/802L aids in avoiding the effect of measurement system expansion on the sample measurement. The measurement design particularly benefits dynamic temperature programs such as those used in Rate-Controlled-Sintering (RCS) and for measurements at lower temperatures.

The DIL 802 is meant for measurements under vacuum or inert gas, while the DIL 802L is for measurements under air. Both versions provide accurate results due to their unique differential measurement configuration. The horizontal structure of these dilatometers ensures optimal temperature uniformity and precludes air currents matching with convection. High resolution LVDT enables high sensitivity displacement measurements, thereby making it possible to measure accurately even very small thermal expansion events.

The LVDT’s core is coupled to a sample via a traditional pushrod and moves in coordination with sample expansion. Similarly, the LVDT tube is coupled to a matching pushrod that is in contact with an inert material or the sample tube base. Then the tube moves based on the thermal expansion of the tool. Therefore, the measured change occurring in position between the LVDT shell and the LVDT core is solely due to sample expansion, and hence absolute measurements of dimension change can be fully prepared without the need for an expansion calibration or subtraction.

Key Features

The main features of the DIL 802 differential dilatometer are as follows:

Measuring heads are thermally stabilized and insensitive to shocks

Furnaces meet specialized needs of temperature and heating rate from -160 to 2300°C

Furnaces can be easily exchanged and multiple furnaces can be used with a single tool

Precise temperature measurements can be made by choosing a suitable thermocouple or pyrometer type for the temperature range of interest

Inert measuring systems are available in a range of materials

Sample tubes, pushrods, and bearings are easily interchanged to meet the needs of a particular measurement

To prevent system interaction with the sample, the tools are made from fused silica, graphite, sapphire, Al2O3, and tungsten

Certified reference materials are available for calibration and verification of tool performance

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