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The Type 631 B is a high-temperature capacitance manometer, operating at either 1500C or 2000C. It was specifically designed for the most difficult semiconductor and biopharmaceutical applications known today, such as nitride CVD and DI-steam sterilization. It is compley self-contained, requiring only 115VDC input power and providing a 0一10VDC analog output signal that is linear with pressure. It is about 40% smaller in its physical size and draws 40% less electrical power than earlier products,making it an ideal choice to upgrade existing systems with 1000C or higher temperature capacitance manometers. In standard form, it includes LED indicators for "At Temperature" and "Heater Failure". The product is also offers the option of two （2） internally-mounted, independently- adjustable electromechanical trip relays that can be set to open or close at any pressure between 0.1%and * of the manometer's measurement range. Full-scale measurement ranges from 1 to 1000 Torr （1.33 to 1333mbar） are available.