Sharp GP2Y0A51SK0F IR Sensor 2-15cm

Measure very close-range distances with precision using the Sharp GP2Y0A51SK0F Infrared Distance Sensor, an analog rangefinder purpose-built for detecting objects between 2cm and 15cm away. Its shorter detection range compared to other Sharp IR sensors gives it noticeably higher resolution over that span, making it especially good at picking up objects that are nearly touching the sensor face, something longer-range sensors handle poorly.

The sensor outputs a simple analog voltage that increases as a detected object gets closer, so reading distance only requires connecting the output to an analog input pin on your microcontroller and applying the datasheet’s voltage-to-distance curve. This makes it considerably easier to work with than sonar-based rangefinders, while offering better real-world performance than many other low-cost IR alternatives. It connects via a 4-pin JST ZH connector, with power, ground, and analog output brought out on separate wires, and includes mounting holes built into its plastic housing for straightforward panel or chassis mounting.

This sensor is well suited for hobbyists and makers building close-proximity object detection, edge/cliff detection for small robots, liquid level sensing, or any project where accurately sensing something within a few centimeters matters more than long-range detection. It’s a reliable, easy-to-integrate choice for Arduino, Raspberry Pi, and other microcontroller-based robotics and automation projects.

Specification:

• Detection Range : 2cm to 15cm
• Output Type : Analog Voltage
• Output Voltage Differential : 1.65V (Typical)
• Operating Voltage : 4.5V to 5.5V
• Supply Current : 12mA
• Update Period : 16.5 ± 4ms
• Connector Type : 4-Pin JST ZH