Detector of radioactivity in foodstuff and water

The utility model discloses a detector of radioactivity in foodstuff and water, comprising an NaI detector, a photomultiplier, a pulse signal amplifier, a single channel analyzer, a microprocessor, an LCD screen, keys, a buzzer, a storage battery, a computer interface, a lead shielded room and a special sample cup with the bottom portion concave. The detector of radioactivity in foodstuff and water has the advantages of being small in size, convenient in carrying and simple in operation, and being suitable for common people to use.