A sensor most suitable for sensitive materials that does not use ultraviolet or infrared as the light source
Easy detection setup eases the burden on the users

The Photohead PH22 is a sensor designed to detect a transparent web or a nonwoven fabric as a detector for EPC. The sensor adopts SPD as the detector element and white LED as the light source to offer a long time, safe operation of meandering detection.


Detects even a slight displacement of web by emitting light with uniform intensity.
Use of SPD enables faster reaction and improves the detection accuracy for high-speed operations.
Detects a 0.1mm displacement of transparent web.
Use of white LED for the light source enables a long time, stable operation and helps to reduce cost.


Spotlight distance 32mm
Detection field of view 6mm
Light source White LED
Light source wavelength Visible Light
Sensitivity Detect displacement 0.1mm of non-transparent web
Output voltage 0 to 5V DC
Detection element SPD
Power supply ±15V DC
Ambient temperature 0 to +50℃
Response frequrncy Filter ON 3Hz(PH20A equivalent)
Filter OFF 30Hz
Main body material Cast Aluminum Alloy
Mass Head: 450g
Cable: 250g

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