ji,
pie gauge is different from field indicator. and ammeter i dont think there is any use for it.. may be you are saying about field indicator.
Purchase one burma castrol strip also, which is used for measuring sensitivity.
Field indicator is used ot measure the resisual magnetism in the part after demagnetizing.
Lux meter and UV meter arew used to find the light intesities. Lux meter for Visible and UV meter for Fluorescent.
THANKS & REGARDS,
T. HARISH,
TECHNICAL MANAGER,
ASNT LEVEL III
UT,RT,MT & PT.
SIEVERT INTERNATIONAL INSPECTION CO. W.L.L,
QATAR