Rosemount 644 harorat sensorlari haroratni o'lchash va uni 4 dan 20 mA gacha bo'lgan doimiy tok elektr signaliga va/yo digital signalga aylantirish uchun mo'ljallangan. Ushbu signal HART simli interfeysi orqali uzatilishi yoki Foundation Fieldbus yoki Profibus PA raqamli signallariga o'tkazilishi mumkin.
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