PHOTOINTERRUPTOR:PAPER SIZE SE

Ricoh’s AW020155 stands apart from generic slot sensors by combining a precise 5 mm transmissive gap with a fast 10 µs response, making it a dependable choice for paper size detection and document feeding in office printers and copiers. Its infrared emitter and phototransistor work together to reliably detect opaque objects such as paper, ensuring accurate size recognition and smooth media handling.

Highlights

• Transmissive sensing method with infrared LED and phototransistor output
• 5 mm gap width and 6 mm slot depth accommodate common paper paths
• Fast 10 µs response time supports high-speed printing and copying
• Wide operating temperature range from -25°C to +85°C
• Through-hole mounting for secure PCB integration
• RoHS compliant construction with durable PBT housing

In daily use

Installed in a printer or multifunction device, the AW020155 continuously monitors the paper path. When a sheet passes through the slot, the infrared beam is interrupted, and the phototransistor switches state, allowing the controller to determine paper size and presence. This prevents misfeeds, enables automatic tray selection, and contributes to consistent output quality. The sensor’s single-channel design simplifies circuit integration, while its 5 V operating voltage aligns with standard logic levels.

Full specifications

• Sensing method: Transmissive
• Output type: Phototransistor
• Emitter type: Infrared LED
• Wavelength: 950 nm
• Gap width: 5 mm
• Slot depth: 6 mm
• Collector-emitter voltage (Vceo): 30 V
• Collector current (Ic): 20 mA
• Forward current (If): 50 mA
• Operating voltage: 5 V
• Response time: 10 µs
• Operating temperature: -25°C to +85°C
• Mounting type: Through-hole
• Package type: Slotted optical switch
• Number of channels: Single
• Detection object: Opaque objects (e.g., paper)
• Application: Paper size detection, document feeding, object sensing
• Housing material: PBT (Polybutylene terephthalate)
• RoHS compliant: Yes

Final note

For service technicians and OEM integrators, the Ricoh AW020155 offers a straightforward, robust solution for paper sensing tasks. Its proven optical design and industrial temperature rating ensure long-term reliability in demanding office environments.