Fuse and Fault Finder
The 188FFF is a Fuse and Fault Finder which comprises of two parts: The Receiver and the Transmitter. The transmitter, draws a current from the main supply circuit  to which it is connected to. With a signal current of 10kHz the transmitter is powered by the mains and requires no batteries. The signal generated by the Transmitter is then searched(sniffed) by the Receiver to detect the Fuse, Circuit Breaker or the faulty circuit. The Receiver is a tuned circuit which has it's center frequency tuned to about 10KHz. The sensor is located in the tip of the Receiver. The amplitude of the received signal is shown on a bar-graph type LEDs. The more Leds ON, the stronger the signal, the Receiver uses one 9V battery.