德國 VMK 15 DR NO co-ax閥門
德國COAX公司成立于1960年,以生產(chǎn)同軸閥著稱,憑借豐富的經(jīng)驗(yàn),可靠而經(jīng)過嚴(yán)格測試的材質(zhì),過硬的質(zhì)量管理,COAX的閥廣泛適用于真空、氣態(tài)、液態(tài)、膠狀、磨粒、污染性以及侵蝕性等各種介質(zhì)。與常規(guī)閥相比,COAX同軸閥能夠以高流量來控制高壓介質(zhì),有兩位兩通和三位兩通可選,連接方式允許螺紋連接和法蘭連接,可通過直動(dòng)式螺線管和外部直接控制
In 1997, müller co-ax ag sought to better serve the needs of its rapidly growing US customer base through the establishment of its first subsidiary abroad: co-ax? valves inc. in Bristol, Pennsylvania. Since its foundation over 15 years ago, co-ax valves inc. has been the central core for parent company, müller co-ax ag’s c*tion of US partnerships — bringing its cutting edge valve expertise for the control of vacuums and gaseous, liquid, gelatinous, abrasive, contaminated and aggressive media, to the forefront of the American market. Today, müller co-ax ag continues to expand its international presence, providing customers and industries worldwide with the exceptional customer service focus that the company has maintained over its 50-year history.
對(duì)于這種應(yīng)用中的便攜式儀表,實(shí)現(xiàn)最長的電池壽命是最重要的目標(biāo),因此,必須將功耗降到,這一點(diǎn)至關(guān)重要。在典型的低功耗系統(tǒng)中,測量電路上電后執(zhí)行一次測量,然后關(guān)斷進(jìn)入長時(shí)間待機(jī)狀態(tài)。然而,在這種應(yīng)用中,由于電化學(xué)傳感器的時(shí)間常數(shù)很長,測量電路必須始終保持上電狀態(tài)。幸運(yùn)的是,因?yàn)轫憫?yīng)緩慢,所以我們可以使用微功耗放大器、高值電阻和低頻濾波器,從而將*噪聲和1/f噪聲降至。此外,單電源供電可避免雙極性電源的功率浪費(fèi)現(xiàn)象。
圖2給出了該便攜式氣體探測器的電路。雙通道微功耗放大器 ADA4505-2在恒電位配置(U2-A)和跨導(dǎo)配置(U2-B)下使用。該放大器的功耗和輸入偏置電流非常低,對(duì)于恒電位部分和跨導(dǎo)部分都是很好的選擇。每個(gè)放大器的功耗僅10 μA,因此電池壽命非常長。
德國 VMK 15 DR NO co-ax閥門