Convection & Pirani-Capacitance Gauges CVM201 Super Bee™ Convection Convection enhanced Pirani Technology Measurement range from 1.00E-04 to 1,000 Torr Built-in controller with digital display 2 analog outputs, 2 setpoint relays RS232/RS485 serial communications More Info about CVM201 Super Bee™ Convection CVM211 Stinger™ Convection Convection enhanced Pirani Technology Measurement range from 1.00E-04 to 1,000 Torr Built-in controller with digital display 1 analog output, 1 setpoint relay More Info about CVM211 Stinger™ Convection CVG101 Worker Bee™ Convection Convection enhanced Pirani Technology Measurement range from 1.00E-04 to 1,000 Torr Requires an external controller to operate More Info about CVG101 Worker Bee™ Convection PCM301 Busy Bee™ Pirani Capacitance Pirani Capacitance Combination Technology Measurement range from 3.80E-05 to 1,125 Torr Built-in controller with digital display Analog output, 2 setpoint relays Gas independent above 7.6 Torr More Info about PCM301 Busy Bee™ Pirani Capacitance