Robin model 4141

line earth looptester


Plastic bag for leads and view of sockets for testing

Robin model 4141 Looptester made by Kyoritsu of Japan who also sold it under their own brand name. Judging by the component date codes this discontinued model was made in 1990.

Please be aware that this tester applies a large current through the line and earth conductors without a corresponding current through the neutral so any residual current device (RCD) in the circuit will trip.


Printed circuit board and internal components



Robin Electronics founded in 1980 established a reputation for excellent and reliable products that were manufactured by Kyoritsu. When Robin was acquired by Fluke, the previous Robin UK management team decided to create Kewtech in 2004 in order to manufacture and market quality test equipment specifically designed for the UK market.