Over 60 years of providing Reliability - Quality Service to the Neurophysiological Community. Grass-Telefactor, An Astro-Med Inc. Product Group manufactures recording instrumentation including Polygraphs, Stimulators, Amplifiers, Amplifier Systems, Neurodata Acquisition Data and Analysis Software, EEGs, Polysomnographs, Long-term Monitoring for research and clinical applications. A complete line transducers, electrodes, and accessories is also available.

| Address: | 1, Rue Edouard Branly, Trappes, 78190, France |
| Telephone: | 34 82 09 00 149 |
| Web: | www.grass-telefactor.com |