Controllers TPG 300 are modular and can be configured variously. Two measuring card slots for the operation of up to 4 gauges. An interface slot for various relay and interface cards. For pressure range 1 · 10-11 to 1000 hPa. Controller IMG 400 for the operation of hot cathode gauges with additional connections for Pirani and capacitive gauges from the ActiveLine family. An interface slot for a Profibus interface card (optional). For pressure range 2 · 10-12 to 1100 hPa.