This research work is an attempt to develop a radio frequency detector comprising of a
peripheral unit which detects stray radio frequencies. Whenever a cell phone near a radio frequency source (e.g. radio), the system becomes activated, which gives beeping sound with deflection on the meter at the output. With this instrument, the radio frequencies are between 50Hz and 100Hz can be detected. The principal of this research work is stated in the theory which has been put to practice. The circuit detects any electromagnetism stray inductances using a deflecting meter and head phone as an indicator. The demonstration of this research work focuses on a simple technique of building cheaper, reliable and flexible instrument.