The 104230003 I-Mag® Cold Cathode Vacuum Sensor features a 1 x 10-11 to 1 x 10-2 Torr vacuum measurement range and a 1 inch diameter tube fitting. The I-Mag® 423 vacuum sensor is lower-cost, more compact, and has a higher bake-out temperature than a comparable 431 series sensor. It is based on the ionization probability of the gas, with the ionization as a result of a high voltage discharge of electrons. These cold cathode pressure vacuum sensors are based on an inverted magnetron design, for an increased measurement range. The dual feedthrough for ion collection is a unique feature, making the pressure reading more accurate than other cold cathode vacuum and pressure sensors.