These heated capacitance manometers are identical to the Types 627B and 628B Baratrons described above except that they add two （2） internally-mounted, independently-adjusted electromechanical relays that can be set to open or close at any pressure from 0.1%to * of the product's full-scale measurement range. These relays can be used to control external equipment, such as isolation valves, other high vacuum gauges （such as hot-filament ionization gauges）, drive motors, etc. They are available in full-scale measurement ranges from 10 to 1000 Torr （13 to 1333mbar）.