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The Type 660B is a microprocessor-controller single-channel power supply and display that is designed for use with all un-heated and 450C heated Baratrons. It offers a 4.5-place digital display of the Baratron's measured pressure, and has a single-menu structure for easy setup and configuration. It also offers four （4） open collector alarm trip points for control of external devices. It can be equipped with an RS232C digital interface,and it mounts in a compact 1/8 DIN package.