Tunnel model type detectors IDG-SB01 and 02, protects the delicate machinery or reject the pollutants of any kind, causing unemployment mo- ves through the detection signaling relay and visual or acoustic devices.The extraction of metals is performed or automated systems or manually.The sensitivity, is regulated by potentiometer or digital is regulated from the outside with IDG-MFS equipments.Stable equipment from vibration and high immunity to interference from the power supply and radio frequencies.Made of steel trays, depending on where you work, the finished material can be painted or galvanized and stainless steel construction. Depending on the conveyor belt, height of the load, product to analyze different models are available.