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Specifications Sensor Head Sensor Heads product name D1.2/F7 D4/F8 optics type focussing focussing dimensions Ø 1.2 mm, length 7.5 mm Ø 4 mm, length 11.5 mm Modes of Operation mounting clamped clamped spot size 70 µm @ 7 mm 70 µm @ 8 mm 7 mm 8 mm focal length connector working environment compatible targets none (fiber glued) none (fiber glued) /RT /RT, /LT/HV, /UHV, /RAD glass, silicon wafer, mirror glass, silicon wafer, mirror vibration measurements at confined machine spaces vibrations analysis of machines and tools linear measurement range 5..9 mm 6..10 mm alignment tolerance ± 0.20° ± 0.35° 30..45 mm 15..30 mm ± 0.20° ± 0.35° linear measurement range - - alignment tolerance - - lateral alignment tolerance - - applications Measurement Specifications target: glass target: mirror linear measurement range alignment tolerance target: retroreflector Environmental Conditions /RT (ambient conditions): 0 .. 100 °C, 1x10 -4  mbar .. 10 bar /HV (high vacuum): 0 .. 150 °C, 1x10 -8  mbar .. 10 bar /UHV (ultra high vacuum): 0 .. 150 °C, 1x10 -10  mbar .. 10 bar /LT (low temperature): mK .. 423 K (150 °C 1x10 -4  mbar .. 10 bar /RAD (radiation hard): 0 .. 150 °C, up to 10 MGy radiation