Airmac ionisation tester

20 kV ionisation tester Type 209 manufactured by Airmec, a British maker of professional electronic test equipment. A specialised instrument designed to detect ionisation and leakage in high voltage systems and insulation. Used in electrical engineering laboratories, telecommunications facilities and industrial environments to assess insulation performance and safety of high voltage equipment.

Prior to modern digital insulation and discharge testing instruments; 1950s–1960s.

W49 x D26 x H17 cm.