HID dimmer operates by using silicon controlled rectifiers as high-speed switches, in a phase control operation, to turn the alternating current (AC) line input power off during specified portions of the AC cycle.

High & medium expansion foam concentrate is a non-toxic synthetic foam concentrate made of tensides, stabilizers and anti-freeze. It can be used in all types of high expansion foam generating equipments. It cools, extinguishes and helps to suppress toxic vapours. It is suitable for use with fresh as well as brackish and salt water suitable at 3% proportioning without altering extinguishing/vapour suppression efficiency. It can also be used as medium expansion foam with suitable equipments.