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Overview
The Photohead photoelectrically detects the web edge.
As a pulsed infrared light emitting diode (LED) is used as the light source, the Photohead can be applied for a web such as photosensitive paper, which is adversely affected by light.
The Photohead PH21 photoelectrically detects the web edge.
This sensor is a miniaturized model of PH16B, but with the same functions.
Specifications
| PH16B | PH21 | |
|---|---|---|
| Sensor gap | 28mm | 10mm |
| Range of measurement | ±4mm | |
| Light source | LED | |
| Light source wavelength | 950nm (near infrared) | |
| power supply | Power supplied from the Web Guide amplifier: 12 V DC | |
| Output | Voltage in proportion to the change in light intensity at the silicon light detection element: 300 mV±20％ when the path is open | Voltage in proportion to the change in light intensity at the silicon light detection element: 350 mV±20％ when the path is open |
| Sensitivity | 0.1 mm of displacement of opaque web | |
| Body material | Aluminum alloy die casting | Conductive plastic |
| Ambient temperature | 0℃ to +50℃ | |
| Weight | 1kg (including cable) | 0.4kg (including cable) |
Đại lý Nireco Vietnam, Cảm biến chỉnh biên PH16B Nireco
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