Branly tripod coherer, 1900-1910

1900-1910 in France
Edouard Branly

Buy this image as a print 

License this image for commercial use at Science and Society Picture Library

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Branly tripod coherer, probably made by Edouard Branly, France, 1900-1910.

Edouard Branly devised the filings coherer in about 1890 but did not use it for detecting Hertzian waves. After wireless telegraphy had been developed for practical purposes in the late 1890s, Branly invented a new form of imperfect-contact detector. The steel tripod rests on a polished steel plate. The feet are slightly oxidised, producing the imperfect contact required for detection.

On display

Science Museum: Information Age Gallery: Cable

If you are visiting to see this object, please contact us in advance to make sure that it will be on display.


Radio Communication
Object Number:
copper (alloy) and metal (unknown)
  • component - object
  • radio receiver
Donated by Professor E. Branly

Cite this page


We encourage the use and reuse of our collection data.

Data in the title, made, maker and details fields are released under Creative Commons Zero

Descriptions and all other text content are licensed under a Creative Commons Attribution 4.0 licence

Using our data


Download catalogue entry as json

View manifest in IIIF viewer

Add to Animal Crossing Art Generator

Download manifest IIIF

Our records are constantly being enhanced and improved, but please note that we cannot guarantee the accuracy of any information shown on this website.