JLG Testboy 130 with LED light
JLG Testboy, magnetic field tester. This item is suitable for rapid and precise testing of electro-magnetic switches and valves.
Their tip lights up to indicate the presence of permanent, DC or AC magnetic fields.
Thereby, they are so sensitive that very often it is not necessary to remove covers or cladding from machines and
the function check can be carried out without any setting-up time or stopping the machine.