Used to detect the pulse from the fuel pipes of diesel fuel injectors. Works on most direct injection diesel engines fitted with 6mm(1/4") to 10mm(3/8") external fuel pipes.
Suitable for use with most timing lights, engine analysers and multimeters that have an inductive pick-up. 6mm(1/4") to 10mm(3/8"). 15% of the highest pressure in the injector pipe.