{"product_id":"vintage-rotating-vane-anemometer-turbine","title":"Vintage Rotating Vane Anemometer Turbine","description":"\u003ch1 data-listing-id=\"675896204\" data-buy-box-listing-title=\"\" class=\"override-listing-title normal break-word mb-xs-2\"\u003eVintage Rotating Vane Anemometer Turbine\u003c\/h1\u003e\n\u003cp data-listing-id=\"675896204\" class=\"override-listing-title normal break-word mb-xs-2\"\u003eThis wonderful looking antique scientific instrument is a 4.5-inch Vintage Rotating Vane Anemometer Turbine. I can't find a maker's mark.\u003c\/p\u003e\n\u003cp\u003eIt has 8 vanes and is a sensing head only, where the speed of revolution is measured by an optical system based on a torch bulb and voltage dependent resistor.  This measurement is then converted to wind speed using a suitable external meter, (not included), attached via the three pin plug and screw fitment. \u003c\/p\u003e\n\u003cp\u003eMade of hammered finish painted brass with Perspex  vanes, this is both a useful industrial measuring tool and an aesthetic beauty.\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003eApproximate Size:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDiameter of Anemometer: 11.5cm \/ 4.5\"\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eMax. Depth: 8.5cm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eThe brass is visible in a few places where the coating has been removed. There are surface scuffs and scratches commensurate with age and use. \u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eAlso known as a Wind \/ Air Speed Flow Meter, it would have been used on, for example, an airfield. Other versions were also extensively used in mines.\u003c\/p\u003e\n\u003cp\u003ePlease click on the following links for more \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/meteorological-weather\" target=\"_blank\"\u003emeteorological instruments\u003c\/a\u003e. \u003c\/p\u003e","brand":"Unknown","offers":[{"title":"Default Title","offer_id":45284119052545,"sku":null,"price":62.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/files\/Vintage_Rotating_Vane_Anemometer_Turbine.jpg?v=1735663194","url":"https:\/\/mullardantiques.co.uk\/en-us\/products\/vintage-rotating-vane-anemometer-turbine","provider":"Mullard Antiques and Collectibles","version":"1.0","type":"link"}