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Metal detector is an electronic device used to detect the presenc e of metal. Metal detectors are used to find the metal objects buried underground or hidden with the objects. Metal detectors is worked through the sensor probe, for sensing the metal. Metal detector is categorized into hand held metal detector, Walk through metal detector, Deep search metal detector, and Under vehicle scanner. Metal detectors are used to detect the gold, siver and relics etc., Hand held metal detectors is mainly used for detecting the metal contents in the human body and its wide applications are airport security, Building security, geological research etc., Walk through metal detector is widely used in shopping malls, temples, airport etc., Deep search metal detector is used for searching the metals which is burried inside the ground. Under vehicle scanner is used to scan the lower part of vehicle. Dhonaadhi Hitec Innovations is one of the reputed concern for metal detectors in southern part of India includes Tamil Nadu, Kerala, Karnataka, Telegana, Andhra pradesh, Andaman and Nicobar Islands since 1993. For more details, visit our website @ http://www.dhonaadhi.in