Ionization Gauges IGM401 Hornet™ Hot Cathode Miniature Bayard-Alpert Technology Measurement range from 1.00E-09 to 5.00E-02 Torr Built-in controller with OLED digital display Analog output and digital input control Setpoint relay and RS485 serial Communications More Info about IGM401 Hornet™ Hot Cathode CCM502 Hornet™ Cold Cathode New Inverted Magnetron Technology Measurement range from 7.60E-10 to 7.60E-03 Torr Built-in controller with digital input control Analog output More Info about CCM502 Hornet™ Cold Cathode CC605/CC606 Cold Cathode – New Inverted Magnetron Technology Measurement range from 7.50E-11 to 3.75E-03 Torr No onboard controller Requires an external InstruTech controller to operate More Info about CC605/CC606 Cold Cathode – New BA600 Mini IG Hot Cathode – New Mini Ionization Bayard-Alpert Technology Measurement range1.00E-09 to 5.00E-02 Torr No onboard controller Requires an external InstruTech controller to operate More Info about BA600 Mini IG Hot Cathode – New BA601/BA602/BA603 Nude and Glass Hot Cathode Nude and Glass Bayard-Alpert Technology Measurement range from 2.00E-11 to 1.00E-03 Torr No onboard controller Requires an external InstruTech controller to operate More Info about BA601/BA602/BA603 Nude and Glass Hot Cathode