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Hanna Instruments is a global manufacturer of quality analytical instrumentation.〔http://investing.businessweek.com/research/stocks/private/snapshot.asp?privcapId=4639092〕 It was founded in 1978 in Padova, Italy by Oscar and Anna Nardo.〔http://www.hannainst.com/usa/about.cfm〕 Hanna Instruments has a network of over 40 subsidiaries in 32 countries around the world.〔http://www.instrumart.com/Manufacturer.aspx?ManufacturerID=1226〕 Hanna Instruments is headquartered in Woonsocket, Rhode Island and has manufacturing sites in Mauritius, Singapore, Hungary and Romania.〔 All production facilities are ISO 9001 Certified.〔http://hannainst.com/literature/iso_cert.pdf〕 ==Hanna Instruments Developments== In 1980, Hanna Instruments developed the first single-probe portable conductivity meter.〔()〕 In 1984, Hanna Instruments developed the first microprocessor-based handheld pH meter.〔 In 1985, Hanna Instruments became the first company to introduce a pH electrode with a built-in temperature sensor〔 In 1988, Hanna Instruments became the first company to introduce the pre-amplified pH electrode.〔 In 1992, Hanna Instruments became the first company to offer a portable pH meter with plain-paper printing.〔 In 1997, Hanna Instruments became the first company to offer a pH tester with double junction electrode.〔 In 2000, Hanna Instruments became the first company to offer a multi-parameter (pH/conductivity/temperature) pocket tester.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hanna Instruments」の詳細全文を読む スポンサード リンク
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