The indicator has
been specifically designed to check the strength and polarity of British
Railways Board A.W.S. Track Inductors both Electro and Permanent.
High grade
magnetic iron components are used in the construction of the moving iron
mechanism. The movement is housed in an aluminium housing finished in
hammer finish paint. Gold for standard strength Inductors and Green for
extra strength Inductors.
Each indicator is
supplied in a leather carrying case to protect the instrument during
transit.
The Inductor
strength is given by a pointer moving over a coloured scale Green to
indicate that the Inductor is in good working order, Yellow to indicate
that the Inductor is below strength and requires attention, Red to
indicate that the Inductor is in a dangerous condition.
Polarity is shown
by the letters P and E which are used to indicate the current polarity
of
permanent Inductors 'P' and energised electro Inductors 'E'.