how to make metal detector coil

{"cid":"91224691","title":"Coil Conveyor Belt Touch Screen Aluminum Foil Packaging Products","imgUrl":"https:\/\/img.chinax.com\/nimg\/95\/4f\/7e9c47012b8b91782a7e94092126-200x200-1.jpg","attrs":{"Price":"negotiation","Brand Name":"SHANAN","Model Number":"SA-508L","Minimum Order Quantity":"1 set","Delivery Time":"15work days","Certification":"CE, ISO","Place of Origin":"CHINA","Payment Terms":"T\/T","Supply Ability":"100 set\/month","Packaging Details":"Box","Voltage":"110~ 220V, 50HZ","conveyor belt running speed":"35 m ~45 m\/ min variable speed","Reject System":"Alarm and stop, push rod, gas blast, fall drop","Height":"700 mm \u00b1 50 mm","Conveyor belt":"Chain link","Frame":"304 \/ 316 Stainless steel","Weight range":"10g-5000g","Weight":"300 kg"}}

{"cid":"91182334","title":"Cold stamping deep drawing stainless steel , sheet metal drawing process production","imgUrl":"https:\/\/img.chinax.com\/nimg\/b7\/67\/1a8f012f23844c15a87498181c98-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"XWT","Model Number":"customized stampings","Minimum Order Quantity":"Negotiable","Delivery Time":"8-10 work days","Place of Origin":"China","Supply Ability":"Around 300K per month","Packaging Details":"Carton , wooden case","Certification":"ISO 9001","Payment Terms":"T\/T","Item":"smoke detector shell","\uff2daterial":"Stainless steel sheet","Thickness":"0.7mm","Net weight":"0.0072kg\/pcs","Dimensions":"Customized","Measuring report":"PPAP report","SPM":"Around 30 PCS","Trade term":"FOB shenzhen"}}