Introduction
The Laser Dilatometer L75 by Linseis represents an advancement in dilatometer technology, utilizing the Michelson-Interferometer principle. This new development offers enhanced resolution and accuracy compared to the traditional push rod dilatometers available since 1957.

Specifications
The L75 features a resolution of ±1 nm (typically ±0.3 nm) and an accuracy of ±50 nm. It operates within a temperature range from room temperature to 1000°C, with a heating/cooling rate of 0.1 to 99.9 K/s or K/min. The system requires a power supply of 230 VAC, 16 A, and 50 to 60 Hz, with a power consumption of 3.5 kVA. Cooling water is needed at 2 l/min and 5 bar, and the sample/cooling gas should be inert, with a maximum flow of 10 l/min at 1 bar.

Technical Features
The dilatometer includes components such as an inductive furnace, sample holder, protection tube, vacuum rods, and a laser optic system. The push rod and sample holder are made of fused silica and are evacuated to ensure precision. The system's wavelength is 632.8 nm, and it can achieve a maximum acquisition rate of 1000 readings per second.

Performance and Accuracy
The new laser dilatometer offers a resolution up to 33.33 times higher than previous models, reaching up to 300 picometers. The interference measurement principle allows for higher accuracy, with potential accuracies up to 30 nm, compared to the previous standard of 100 nm.

Operational Considerations
For optimal performance, consistent conditions such as room temperature, start temperature, heat-up speed, and sample atmosphere must be maintained. The system's reproducibility is ±10 nm, and it is crucial to ensure identical conditions for each run to achieve the best results.

Contact Information
Linseis GmbH is located in Selb, Germany, and Linseis Inc. in Robbinsville, NJ, USA. Contact details include phone numbers, fax, and email addresses for both locations.

Products and Services
Linseis offers a range of products including DIL, TG, STA, DSC, HDSC, DTA, TMA, MS/FTIR, In-Situ EGA, Laser Flash, and Seebeck Effect instruments. They also provide service lab and calibration services.