{"product_id":"vintage-casella-low-speed-air-speed-meter-anemometer-t16320","title":"Vintage Casella Low Speed Air Speed Meter\/ Anemometer T16320","description":"\u003ch1 data-listing-id=\"675896204\" data-buy-box-listing-title=\"\" class=\"override-listing-title normal break-word mb-xs-2\"\u003eVintage Casella Low Speed Air Speed Meter \/ Anemometer T16320\u003c\/h1\u003e\n\u003cp\u003eThis wonderful looking little portable 1940s anemometer is a 7cm \/ 2¾ inch Vintage Casella Low Speed Air Speed Meter \/ Anemometer T16320 in its original velvet lined leather travel case.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe instrument is in very good working condition, with some surface blemishes on the dial, but I can't attest to its accuracy. It comes in its original maroon velvet lined leather case, which is worn and discoloured with blemishes, a correction card, and a leaflet with general information on the use of an air meter.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApproximate Size:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDiameter of Anemometer 7 cm \/ 2¾ \"\u003c\/li\u003e\n\u003cli\u003eDial Diameter: 5.5cm\u003c\/li\u003e\n\u003cli\u003eLeather Transit Case\n\u003cul\u003e\n\u003cli\u003eWidth: 10 cm\u003c\/li\u003e\n\u003cli\u003eDepth: 8.4 cm\u003c\/li\u003e\n\u003cli\u003eHeight: 9 cm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eThis is a small type of anemometer\/ air speed meter with flat vanes, which indicate the number of linear feet of air passing through the instrument during its exposure. A portable device generally used to measure air flow in ducting, fan openings etc, in a range of environments where the air speed doesn't exceed the maximum stated velocity. \u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eAir Meter Serial number 5516\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eType: T.16320\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDial range 1000 metres\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSpeed Range 15-350 metres\/min\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCorrection:  8 metres\/min addition to the observed reading\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIt has 8 \u003cem\u003eMica\u003c\/em\u003e (silicated mineral) vanes and 2 dials measuring 0-90 on the outer dial and 0-9 on the smaller inner dial. It has an on\/off lever and a zero reset button. \u003cmeta charset=\"utf-8\"\u003e\u003c\/p\u003e\n\u003cp\u003eManufactured by CF Casella \u0026amp; Co, London (established in 1799 and suppliers of scientific equipment to eminent scientists and engineers, including Charles Darwin).\u003c\/p\u003e\n\u003cp\u003eMechanical anemometers were a piece of safety equipment, invented by \u003ca href=\"https:\/\/www.gracesguide.co.uk\/Benjamin_Biram\"\u003eBenjamin Biram\u003c\/a\u003e in 1844, to determine the volume of air entering or exiting mine workings. They were produced in 2 styles; Biram style which have the dials and vanes on the same plane and the offset style which has the dials perpendicular to the vanes. \u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ePlease click on the following link for more \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/vintage-technology-scientific-engineering-imaging-medical-equipment-instruments-tools\" rel=\"noopener\" target=\"_blank\"\u003evintage tech\u003c\/a\u003e\u003c\/p\u003e","brand":"Casella","offers":[{"title":"Default Title","offer_id":56990906057079,"sku":null,"price":99.49,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/files\/Vintage_Casella_Low_Speed_Air_Speed_Meter_Anemometer_T16320.jpg?v=1748858879","url":"https:\/\/mullardantiques.co.uk\/products\/vintage-casella-low-speed-air-speed-meter-anemometer-t16320","provider":"Mullard Antiques and Collectibles","version":"1.0","type":"link"}