The RPI-2150N is a reflective photosensor manufactured by Rohm Semiconductor. It integrates an infrared LED and a phototransistor into a single compact package. This configuration allows the sensor to detect the presence or absence of an object based on the reflection of infrared light. Its small size and integrated design make it suitable for a variety of applications where space is limited.

Applications

• Paper detection in printers and copiers: The sensor can detect the presence or absence of paper, ensuring proper operation and preventing jams.
• Object detection in automated systems: It can be used to detect the presence of objects on a conveyor belt or in a manufacturing process.
• Robotics: Can be used in robots for obstacle avoidance and line following.
• Currency validation in vending machines: It helps determine the authenticity of banknotes and helps to prevent fraud.
• Optical encoders: The sensor can be used in rotary encoders to measure the angular position or speed of a rotating shaft.

Features

• Integrated infrared LED and phototransistor: Simplifies design and reduces component count.
• Compact package: Saves space and allows for use in small devices.
• High sensitivity: Ensures reliable detection of objects.
• Fast response time: Allows for high-speed operation.
• Low current consumption: Suitable for battery-powered applications.

Benefits

• Improved system performance: Reliable object detection improves the overall performance of the system.
• Reduced system cost: Integrated design reduces component count and assembly costs.
• Simplified design: Integrated design simplifies circuit design and reduces development time.
• Increased reliability: High-quality components and robust design ensure long-term reliability.
• Lower power consumption: Minimizes power consumption in battery powered applications.

Additional Details

The RPI-2150N operates with a forward current of 20mA. The collector-emitter voltage is typically around 30V. It has a peak sensitivity wavelength in the infrared spectrum, optimized for reliable object detection. The operating temperature range is from -25°C to +85°C, making it suitable for a wide range of environments. The sensor's output is an analog signal that varies depending on the amount of reflected light received by the phototransistor. An external resistor is usually required to convert the phototransistor's current output into a voltage signal.