The Penning Gauge PEG100 is a cold cathode sensor based on the well proven principle of Penning. For degassing of the all-metal sensor with Al 2 O3 current feedthrough, the housing of the transmitter with its electronics and magnet may easily be removed. The magnet offers a closed magnetic field for negligible stray field. The PEG therefore may also be installed close to sensitive parts within a system. The anode ring and the titanium cathode plates may be exchanged easily for quick maintenance should they become contaminated. Since sputtered titan is not magnetic - limiting the build up of short circuits within the sensor - the risk of contamination is greatly reduced. The newly designed cathode plate acts as a baffle for the sensor.