Surge Monitor Type Lsm-1 Gd Class 03 (Leakage Current Recording Meter) With Counter And Insulating Base Suitable For 42Kv Lighting Arrester As Per Rdso Spec. No. Ti/Spc/Psi/Mogtla/0101(02/2015), But Lead For Surge Monitor Should Be 12 Mtrs Length. Make: Rdso/Core Approved Source./40225682A/105904574 (EXPIRED)