Vertical Dilatometer (DIL) | Thermal Expansion Measurement

Vertical Dilatometer (DIL) | High-Sensitivity Thermal Expansion Measurement System

The vertical dilatometer offers ultra-high sensitivity and low-noise measurement performance, specifically designed for high-temperature expansion, stress behavior analysis, and advanced materials research. This system is widely used in ceramics, glass, high-performance composites, and precision process development, and is particularly suitable for high-accuracy measurements of ultra-low CTE materials.

The L75V Series adopts a unique vertical configuration combined with friction-free transmission and a vacuum-sealed system to ensure excellent measurement repeatability and environmental stability. It supports a wide range of sample types, including solids, powders, liquids, and gels, and can operate under vacuum, oxidizing, or reducing atmospheres.

Key Functions and Features

Measurement of coefficient of thermal expansion (CTE), linear expansion, glass transition temperature, sintering temperature, and phase transitions
Delta L resolution down to 0.03 nm, ideal for precision research and ultra-low expansion materials
Adjustable contact force from 10 mN to 1 N, suitable for samples with different hardness and material types
Software supports a Chinese user interface, Excel data export, real-time curve visualization, and automated test sequences

Temperature Range

-180°C to 2800°C (depending on furnace configuration)

Optional Accessories and Software Functions

Various sample holder designs (solid / powder / liquid / gel)
Manual gas control or fully automated MFC-based atmosphere control system
Rate-Controlled Sintering (RCS) module
L-DTA (Dilatometric Differential Thermal Analysis) function

Measurable Properties

Coefficient of thermal expansion (CTE)
Linear thermal expansion
Physical thermal expansion
Sintering temperature
Phase transition behavior

Vertical DIL vs. Horizontal DIL Comparison

Item	Vertical DIL	Horizontal DIL
Load direction	Vertical downward (gravity-assisted, naturally uniform force)	Horizontal forward (mechanically applied force)
Force uniformity on sample	High; stable gravity direction minimizes lateral interference	May be affected by lateral friction or misalignment
Measurement sensitivity	Higher resolution; ideal for low-CTE materials (ceramics, glass)	Standard sensitivity; more influenced by friction
Sample stability	Excellent; minimal displacement during long high-temperature tests	Thermal cycling may cause slight displacement
Clamping method	Top-and-bottom push rod support with stable contact	Lateral clamping with less uniform pressure
Application advantage	High-precision research and ultra-low CTE materials	General-purpose industrial applications
Instrument footprint	Upright structure with greater height	Horizontal layout requiring bench space
Typical applications	Ceramics, glass, advanced composites, aerospace and defense	Metal processing, polymeric materials, consumer products