What is a Com.G@te? A Com.G@te is an optional accessory for Huber units with Pilot ONE. Depending on the model of your Huber unit, you would use either external Com.G@te (part number HB6915) or the the internal Com.G@te (part number HB31217). The Com.G@tes provide the following interfaces: Analogue interface (AIF) for 4-20 mA communication POKO (volt-free contact / floating contact) ECS (external control signal) RS232/RS485 (serial) The external Com.G@te also has a level interface (to connect an external float switch, for monitoring the level of an externally closed application). These are in addition to any interfaces already on the Huber unit. A Com.G@te is always required if you need an analogue interface.