Tender For corrigendum : supply of pull cord switch : : - dgms approved flp pull cord switch , pull cord wire for belt conveyor , intrinsically safe pre start audio visual alarm with dgms approved flp power source primary voltage 550 v and 110 v secondary voltage 15 v , intrinsically safe pre start audio visual alarm with dgms approved flp power source primary voltage 550 v and 110 v secondary voltage between 12 v to 24 v , dgms approved intrinsically safe signaling bell with transformer complete power source primary voltage 550 v and 110 v secondary voltage 15 v , dgms approved intrinsically safe signaling bell with transformer complete power source primary voltage 550 v and 110 v secondary voltage 24 v