INTRINSICALLY SAFE EQUIPMENT & CIRCUITS (Ex ‘i’ ) (insert a small photo)
Only electrical protective measure (protection technology by way of power limitation), the other protective techniques use mechanical means to prevent ignition from electrical faults (max. 30 volts or 50 mA)
Ex ‘i’ apparatus is the one which has all the circuits within intrinsically safe
Ex ‘i’ circuit is the one which has intrinsically safe barriers with Zenner diodes for power limitation
Minimum IP 20 ingress protection