Wide UHV measuring range of 1 x 10-3 to 3 x 10-11 mBar Replaceable twin tungsten, thoria or yttria-coated filaments available Individual glass compression seals around each feedthrough pin are more economical and robust than ceramic, resulting in a less expensive and more rugged gaugehead Central collector pin is inherently guarded against leakage currents by the grounded bulk of the flange The molybdenum grid has a closed-end, light, rigid structure, resulting in high sensitivity The x-ray induced electron desorption current at the collector is minimised by geometry and screening Connector pins are gold-plated, shrouded and polarized Gold plating ensures that oxidation on the air-side cannot occur even after repeated bakeouts Degassing by electron-bombardment Maximum bakeout temperature 450°C Sensitivty 19 per millibar for nitrogen X-ray asymptote 3 x 10-11 mBar DN40 CF mounting flange, NW35CF (2.75″) RoHS compliant