NT6103A radiation multi-purpose monitor is a kind of intelligent instrument which is equipped with a built-in high sensitivity radiation detector. Its microprocessor can process data with high-speed. And the LED can display data clearly and visibly. It can set upper and lower limit alarm threshold. and has the sound and light alarm. The instrument can not only be used independently but also used with the host produced by our company and formed a network. Switch power and batteries can supply the power of the instrument. It is an ideal instrument used for testing the dose rate of gamma and alfa in an environmental laboratory, irradiation room, nuclear medicine, molecular biology, radioactive chemistry, nuclear material storage and commodity inspection.