Thermal Expansion Coefficient Tester
Published: 3/14/2025
The DIL0806 A/B measures linear thermal expansion of materials under controlled temperature programs using inductive displacement sensing and PID temperature control. It is suited for carbon fibers and composites, metal alloys, glass, ceramics, and refractories across cryogenic to high-temperature ranges.
Product Description
The DIL0806 A/B thermal expansion coefficient tester is designed for precise measurement of linear dimensional change as a function of temperature. It employs an inductive displacement transducer with an integrated measurement amplifier, adjustable contact pressure, and vacuum-sealed mechanics to ensure stable, low-noise detection.
The system supports interchangeable sample holders made of quartz, alumina (Al2O3), or graphite, enabling measurements for diverse materials and temperature ranges. Configurable furnaces cover cryogenic (-196°C) through high-temperature regimes up to 2000°C, with appropriate protection tubes for gas atmospheres and optional liquid-nitrogen cooling for low-temperature testing.
A modular architecture separates the measurement section from temperature control and data acquisition. Linear heating and cooling rates are programmable over a broad range, with soak segments and safety features such as sensor isolation and over-temperature protection. External software provides real-time visualization, test sequencing, and data processing.
Ancillary components include a thermostatic circulating bath to stabilize the transducer base, vacuum hardware for atmosphere control, and standard reference samples for calibration. The system can operate standalone via embedded control and can be connected to a host computer for automated testing.
Technical Specifications
| Parameter | Specification |
|---|---|
| Measurement Range (Displacement) | 5000 μm |
| Displacement Resolution | 0.1 μm |
| Adjustable Contact Pressure | 15–45 cN |
| Adjustable Sample Length | 25–50 mm |
| Maximum Sample Diameter | 10 mm |
| Sample Holder Materials | Quartz; Alumina (Al2O3); Graphite |
| Furnace Temperature Ranges (Options) | -196–200°C; -40–600°C; RT–1000°C; RT–1600°C; RT–1700°C; RT–2000°C |
| Furnace Type | Tubular furnace with heater, S-type control thermocouple, and fan |
| Furnace Power Supply (Rating) | 2.0 kVA |
| Protection Tubes | For gas flow, with support flange |
| Low-Temperature Module | Liquid nitrogen Dewar with piston-driven displacement coupling |
| Thermostatic Bath | Cooling capacity 260 W at 20°C; Heating power 2000 W; Temperature stability ±0.01 K; Includes 10 m hoses and fittings; Supply 230 V / 50 Hz |
| Heating/Cooling Rate | 0.01–999.99 K/min (programmable) |
| Isothermal Segment Duration | 0–99 h 59 min |
| Inputs (Data Acquisition) | Dual analog inputs; ±2,000,000 counts resolution; Optically isolated; Range-switchable preamplifiers |
| Temperature Control | Analog PID with STC, ambient compensation, thermocouple support; cutoff protection |
| Supported Thermocouples (By Temperature) | K; E; R; S; B; W-Re |
| Computer Interface | PCI or USB 2.0 |
| Gas Handling | Outlet return tube with corrosion-resistant steel valve and gas plug; supports fixtures |
| Calibration Standard | Fused quartz standard sample, d6 × 25 mm, with certified expansion data |
| Vacuum System | Two-stage rotary vane pump (4.2 m³/h), vent valve, shut-off valve, mechanical gauge, oil mist separator |
| Configuration | Vertical or horizontal measurement geometry (selectable) |
| Sample Diameter Compatibility | 5–10 mm |
| Operating Mode | Offline (embedded control) or online (host-controlled automatic testing) |
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B6-101, Zhongnan High-Tech Intelligent Manufacturing Industrial Park, No. 10 Shuangma Street, Yuetang District, Xiangtan City, Hunan Province, China
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