float level switch with 400hz frequency

{"cid":"91202321","title":"Large inventory of spot goods and NEW FINETEK SCX Vibrating Rod Type Liquid Level Switch ,Vibration frequency 395~405HZ","imgUrl":"https:\/\/img.chinax.com\/nimg\/dc\/92\/aef5173273d0313c7a02e34c88d0-200x200-1.jpg","attrs":{"Price":"1660","Brand Name":"Finetek","Model Number":"SCX","Minimum Order Quantity":"1","Delivery Time":"3 days","Supply Ability":"1000","Operating pressure vacuum":"~150PSI(10BAR)","Packaging Details":"original packing","TEM":"-40\u2103~60\u2103","weight":"770g\/5M","Place of Origin":"china","Payment Terms":"L\/C,D\/A,D\/P,T\/T,Western Union"}}

{"cid":"91224685","title":"Switch-Type Capacitive Level Gauge Viscous Materials Frequency Sweep Setting","imgUrl":"https:\/\/img.chinax.com\/nimg\/d7\/8c\/d775a77808e10a6d6844857598d4-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"QINWEIYB","Model Number":"WKC319","Minimum Order Quantity":"1Set","Delivery Time":"5-8 work days","Output type":"NPN + PNP PWM output","Supply Ability":"100PCS\/Month","Working voltage":"10-30V","Payment Terms":"Western Union,T\/T,D\/P,D\/A,L\/C","Housing material":"316L stainless steel","Storage tank pressure":"-0.1 to 1 MPa","Current consumption":"<50mA","Installation screw hole":"G1\/2 external thread","Probe material":"PEEK","Packaging Details":"Carton or wooden box","Environment temperature":"-40\u00b0C~85\u00b0C","Protection level":"IP68"}}