air diffuser for noise sensitive testing

{"cid":"91187171","title":"FFU BFU Hood Fan Filters Ceiling Mount Hepa Air Purifier AC220V With Diffuser","imgUrl":"https:\/\/img.chinax.com\/nimg\/b8\/ca\/47ecf501a54a04768a4c4884a381-200x200-1.jpg","attrs":{"Price":"Reconsideration US$190.00-250.00 Set","Brand Name":"YANING","Model Number":"BFU- SL570","Minimum Order Quantity":"1 SET","Delivery Time":"7 work days","Certification":"CE ISO SGS","Place of Origin":"CHINA","Payment Terms":"Western Union, T\/T, L\/C","Supply Ability":"100 units\/Week","Packaging Details":"The machine itself is first wrapped with plastic film, the four corners are protected by cardboard or protective foam, and then fixed in the pallet or wooden box.","Material:":"Powder Coated Steel \/ SUS304\/Galvanized Sheet","Power:":"550W","Voltage":"AC220V 50 Hz or custom","Warranty":"1 Year","HEPA Filter":"H14, 99.99%@0.3um","Dimension":"L385*W1230*H650mm","Hepa Filter Size":"305*610*150mm","Fan Type":"Aluminum turbofan","Fan Vibration":"0.2~0.5mm\/s","Air Velocity":"0.45 m\/s","Noise Level":"<54 dB","Fan pressure":"210pa"}}

{"cid":"91149395","title":"Small Area Aroma coffee scented air freshener with Aluminum and quiet working and strong mist","imgUrl":"https:\/\/img.chinax.com\/nimg\/e7\/03\/da8df0a9bafa3c3f29799c86027c-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"maxair","Model Number":"MX-803","Minimum Order Quantity":"20 pcs","Delivery Time":"3-5 days after 100% payment\u00b7","Certification":"CE, ROHS","Place of Origin":"Shenzhen, China","Payment Terms":"EXW\/FOB( Shenzhen)","Supply Ability":"3000 pcs per month","Packaging Details":"Neutral packing","Voltage:":"220V\/50HZ","Power:":"18W","Noise:":"<30dba","Coverage:":"1000cbm\/2000-3000square ft","Technology:":"Cold-air diffusion","Oil capacity:":"350ml"}}

{"cid":"91211450","title":"SO2-AE Sulfur Dioxide SO2 Sensor Used For Flue Gas Detector High Concentration","imgUrl":"https:\/\/img.chinax.com\/nimg\/ca\/36\/f21f35bd07ef948d6d66e15a9c53-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"Alphasense","Model Number":"SO2-AE","Minimum Order Quantity":"1","Delivery Time":"3-5work days","Place of Origin":"UK","Payment Terms":"L\/C, D\/A, D\/P, T\/T, Western Union, MoneyGram","Supply Ability":"1000pcs\/Month","Packaging Details":"In tray","Response time":"25s","Sulfur dioxide detection range":"0-2000 PPM","Overload":"10000 PPM","Size":"20.2 x 16.5 \u03a6","Sensitivity":"55 to 80nA\/ PPM","Range":"2000"}}