supply of portable electro magnetic yokeportable electro magnetic yoke,portable electro magnetic yoke. the yoke unit will have a rugged, compact, handy constructi on with a moulded handle and wear resistant finish. it should be provided with ac or pulsating hwdc magn etic field for surface and sub surface flaw detection in ferromagnetic materials with articulated legs of inter pole distance from 0-300 mm. working voltage-220/230-volt, 50 hz ac supply, input current-2 amps, liftin g power in hwdc mode approx 27 kgs at 100 mm spacing. yoke weight 3+/-1 kg approx. controls-1. on/of f switch, 2. ac//hwdc switch. along with puffer bulb, standard weight of 4.5 kg x 5 nos. each weighs conn ecting with bolt, 05 kg of dry gray powder, standard piece which have artificial hole. [ warranty period: 30 months after the date of delivery ] ]