The electricians that did my EICR recently saw it and said "ooh, that looks fancy". Worked well enough to diagnose a few miswired sockets in the house (one L/N swapped and one faulty earth).
Their testing with a ££££ Megger found a few more things that this socket tester didn't find.
I bought one like this https://www.amazon.co.uk/Display-Electrical-Receptacle-Detector-Inspections/dp/B0CZD5PJ7R and it works well enough.
The electricians that did my EICR recently saw it and said "ooh, that looks fancy". Worked well enough to diagnose a few miswired sockets in the house (one L/N swapped and one faulty earth).
Their testing with a ££££ Megger found a few more things that this socket tester didn't find.