Photohead PH22VAS for vacuum environments

Photohead PH22VAS for vacuum environments


The PH22VAS is an EPC sensor designed to be installed in a vacuum environment. Its airtight design prevents component degradation within the sensor and stops outgassing. This design also prolongs the life of the sensor in a corrosive gas environment.


  • Applicable to vacuum environment
  • Sealing structure prevents outgassing
  • Corrosive gas resistant
  • For various web materials (transparent, opaque, and non-woven etc.)
  • Installable in a vacuum chamber. Machinery cost can be reduced


Light-emitting and lightreceiving gap22 mm
Detection field of view6 mm
Light sourceWhite LED
Light source wavelengthVisible Lightr
SensitivityCan detect a 0.1 mm displacement in a transparent web
Output voltage0 to 4 V DC (depends on the web material)
Detection elementSPD
Power supply±15 V DC
Ambient temperature0 to +50°C
Ambient humidity35-85% RH (no condensation)
Protective structure ratingIP60 (when installed)
Response frequrncy30 Hz
Body materialAluminum alloy and stainless steel
Mass1.3 kg

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