page_title: Avometer
section_title: Other products
hierarchical_section_title: Avometer / Other products
caption_attribution_description: Photo showing the Radiac Survey Meter used by the Royal Observer Corps.
context_page_description: AVOmeter is a British trademark for a line of multimeters and electrical measuring instruments; the brand is now owned by the Megger Group Limited. The first Avometer was made by the Automatic Coil Winder and Electrical Equipment Co. in 1923, and measured direct voltage, direct current and resistance. Possibly the best known multimeter of the range was the Model 8, which was produced in various versions from May 1951 until 2008; the last version was the Mark 7.
  The multimeter is often called simply an AVO, because the company logo carries the first letters of 'amps', 'volts' and 'ohms'. The design concept is due to the Post Office engineer Donald Macadie, who at the time of the introduction of the original AVOmeter in 1923 was a senior officer in the Post Office Factories Department in London.
context_section_description: The company manufactured geiger counters for civil defence use during the 1950s and 60s.
  The Automatic Coil Winder & Electrical Equipment Co. Ltd. made many other types of instruments, including a line of valve (vacuum tube) testers.
caption: AVO Meter Survey Radiac Mk.6 geiger counter
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