supply of magnetic field indicator pie gauge and portable yoke magnetic crack detector.magnetic field indicator pie gauge and portable yoke magnetic crack detector.,magnetic field indicator pie gauge for determination of field orientation of ma gnetic field to detect the discontinuous in ferrous metal for magnetic inspection test. note : calibration certificate from nabl accredited lab to be submitted along with the material. [ warranty per iod: 30 months after the date of delivery ] ] , portable yoke magnetic crack detector. mat. & spec.: i) supply volt 220v (ac), 50 hz, single phase, 5a (ac) source. yoke will draw approx. 2a at maximum load condition, ii) pole adjustment: - 0 to 27 5 mm (approx.), iii) pull force or lifting power at h.w.d.c. 28 kg max at 130 mm spacing, yoke mt :- 3.9 kg (approx.). [ warranty period: 30 months after the date of delivery ] ]