The vertical models eliminate any friction between the sample and the measuring system. Optionally an automatic pressure control is available. The dual pushrod operation, when used for higher temperatures with AI 2 O 3 measuring system, is the ideal way to achieve the highest possible resolution of a dilatometer. The DMA L77 is for dynamic mechanical analysis, measuring penetration, dilatation and E-modulus. The difference between the theoretical and the measured expansion values as a correction function and can be displayed graphically.
Most reference materials are available with a calibration certificate.