sources too closely associated with the subject potentially preventing the article from being verifiable and neutral . please help improve it by replacing them with more appropriate citations to reliable independent third party sources . august 2015 learn how and when to remove this template message alicat scientific type private industry industrial automation headquarters tucson arizona website alicat.com alicat scientific is a manufacturer of mass flow and pressure instrumentation . established in 1991 alicat manufactures differential pressure based mass flow meters mass flow controllers liquid meters and controllers and pressure controllers for industrial and laboratory applications . 1 based in tucson arizona usa the company also has offices in india and china as well as many representative companies throughout the world . alicat created the worlds first bidirectional flow controller . 2 additionally the company held the patent for the laminar flow elements used in the body of the device . alicat was awarded the 2015 halma plc innovation award for best product for the whisper line of flow meters and controllers . 3 history edit alicat was established in 1991 in tucson arizona . in 2010 the company was acquired by halma plc as part of its environmental & analysis sector . 4 products edit alicat s flow products are based on the principles of hagen poiseuille s equation which involves differential pressure for a known fluid viscosity while maintaining laminar flow . laminar flow is created by forcing flow through thin channels in the flow body of the device . because hagen poiseuille s equation depends on the viscosity of the fluid any gas or liquid used in the devices must have a well defined viscosity curve covering the full range of operating conditions . 5 references edit alicat scientific inc. halma . retrieved march 27 2015 . 1 bidirectional mass flow controllers mcd series alicat . retrieved may 29 2015 . 2 innovation awards 2015 interns whispers and sprints win by popular demand halma . retrieved may 29 2015 . 3 acquisition of alicat scientific . halma . november 3 2010 . retrieved march 27 2015 . 4 how it works . alicat . retrieved march 27 2015 . 5 retrieved from https en.wikipedia.org w index.php title alicat scientific & oldid 674160367 categories privately held companies based in arizonacompanies based in tucson arizonacompanies established in 19911991 establishments in arizonamanufacturing companies based in arizonahidden categories articles lacking reliable references from august 2015all articles lacking reliable referencespages using infobox company with unsupported parameters navigation menu personal tools not logged intalkcontributionscreate accountlog in namespaces article talk variants views read edit view history more search navigation main pagecontentsfeatured contentcurrent eventsrandom articledonate to wikipediawikipedia store interaction helpabout wikipediacommunity portalrecent changescontact page tools what links hererelated changesupload filespecial pagespermanent linkpage informationwikidata itemcite this page print export create a bookdownload as pdfprintable version languages add links this page was last modified on 2 august 2015 at 02 11 . text is available under the creative commons attribution sharealike license ; additional terms may apply . by using this site you agree to the terms of use and privacy policy . wikipedia is a registered trademark of the wikimedia foundation inc. a non profit organization . privacy policy about wikipedia disclaimers contact wikipedia developers cookie statement mobile view