Horizontal Dual-Tube Thermal Expansion Coefficient Tester

Published: 3/14/2025

Horizontal dual-tube dilatometer for measuring linear thermal expansion of ceramics, refractories, glass, graphite, polymers, and metal alloys. Supports automated testing with computer control, suitable for QC and research per GB/T32158-2015 and GB/T3074.4 sample preparation methods.

Product Description

The DIL-SG series is a horizontal, dual-tube dilatometer designed to determine linear thermal expansion coefficients using the push-rod expansion method. It can test two specimens simultaneously or run a comparative method with a standard reference, enabling efficient material characterization across ceramics, refractories, glass, graphite, polymers, and metal alloys.

The system combines microcontroller-based control for displacement and temperature with PC connectivity for fully automated operation, parameter editing, data acquisition, reporting, and archival. An intuitive interface, automatic analysis software, and optional controlled atmospheres support routine quality control and research workflows in industrial laboratories and institutes.

Technical Specifications

Parameter	Specification
Details	Maximum temperature options: 1000°C, 1400°C, 1600°C (selectable) Heating rate: 0.1–20 K/min (customizable on request) Temperature control: PID control with full-process parameter adjustment via instrument; parameters editable via PC Temperature control accuracy: ±1°C Temperature recording error: ≤ ±0.5% Displacement measurement range: ±2.5 mm Displacement measurement error: ±0.1% Displacement resolution: 0.1 μm Sample length: up to 50 mm (max) or 25 mm Sample diameter: 6–10 mm (max) Test method: push-rod expansion (dual-tube standard type) Specimen holder material: alumina (Al2O3) Atmosphere: purge gas capable; vacuum option available (extra cost) Channels/specimens: two specimens simultaneously or comparative test (standard vs. sample) Operation modes: off-line instrument control; on-line PC automated testing Software: automatic analysis software included Standards (sample preparation): GB/T 32158-2015; GB/T 3074.4 Main supply scope: test host (1), test software (1 set), quartz/alumina standard (1 piece)

Parameter

Specification

Details

Maximum temperature options: 1000°C, 1400°C, 1600°C (selectable) Heating rate: 0.1–20 K/min (customizable on request) Temperature control: PID control with full-process parameter adjustment via instrument; parameters editable via PC Temperature control accuracy: ±1°C Temperature recording error: ≤ ±0.5% Displacement measurement range: ±2.5 mm Displacement measurement error: ±0.1% Displacement resolution: 0.1 μm Sample length: up to 50 mm (max) or 25 mm Sample diameter: 6–10 mm (max) Test method: push-rod expansion (dual-tube standard type) Specimen holder material: alumina (Al2O3) Atmosphere: purge gas capable; vacuum option available (extra cost) Channels/specimens: two specimens simultaneously or comparative test (standard vs. sample) Operation modes: off-line instrument control; on-line PC automated testing Software: automatic analysis software included Standards (sample preparation): GB/T 32158-2015; GB/T 3074.4 Main supply scope: test host (1), test software (1 set), quartz/alumina standard (1 piece)

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