SHARP GP2Y0A41SK0F Analog IR Distance Measuring Sensor Unit with Cable (4cm – 30cm)

Achieve highly reliable proximity and short-range tracking with the SHARP GP2Y0A41SK0F IR Distance Measuring Sensor Unit. This compact sensor combines an infrared emitting diode (IR-LED), a position sensitive detector (PSD), and an onboard signal processing circuit to measure distances from 4 cm up to 30 cm. Because it calculates distances using optical triangulation, its analog voltage output remains unaffected by variations in ambient temperature or object color and reflectivity.

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Tags SHARP GP2Y0A41SK0F IR Distance Sensor Sharp Infrared Sensor 4-30cm Distance Sensor Analog Proximity Sensor Triangulation Laser Sensor Sharp IR Arduino Robotics Obstacle Detection Short Range Proximity Sensor PSD Sensor.

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Detailed Description

The SHARP GP2Y0A41SK0F Analog IR Distance Measuring Sensor Unit is an ultra-reliable, small-form-factor distance checking solution engineered to deliver precise telemetry within close quarters. The device houses an integrated, factory-calibrated combination of an infrared emitting diode (IR-LED), a position-sensitive detector (PSD), and built-in signal processing circuitry. Unlike standard proximity sensors that calculate distance by reading back the raw reflected intensity of light—which can be easily tricked by dark or highly reflective surfaces—the GP2Y0A41SK0F uses structural optical beam triangulation. It determines distance based on the physical angle at which the reflected bounce hits the internal PSD array, providing consistent, highly predictable distance evaluation maps.

The sensor outputs a smooth, continuous analog voltage matching the detected distance profile, which can be sampled easily by any standard Analog-to-Digital Converter (ADC) pin on a microcontroller (such as an Arduino, ESP32, STM32, or Raspberry Pi Pico). This version features an incredibly fast 16.5ms measuring cycle, vastly outperforming older legacy modules like the GP2D120. It provides a drop-in upgrade path for developers requiring tighter resolution and minimal blind spots at close range.

Key Features and Benefits

Dependable Triangulation Processing: Minimizes data measurement deviations caused by target material shifts, surface colors, or ambient temperatures.
Ultra-Short Minimum Threshold: Capable of reading objects as close as 4 cm away, making it optimal for tight space navigation and near-contact limits.
Accelerated Update Response Rate: Features a lightning-fast $16.5 ext{ms} pm 4 ext{ms}$ sampling loop update period to keep up with agile robotic systems.
Simple Analog Interfacing: Connects to standard ADC pins without requiring complex digital communications protocols or timing libraries.
Drop-in Footprint Optimization: Consumes an average operating current of just 12mA, introducing minimal load burdens to mobile, battery-driven layouts.

Technical Specifications

Feature Component	Specification Details
Manufacturer / Core Brand	SHARP Corporation / Socle Technology
Model Designation Code	GP2Y0A41SK0F
Optical Ranging Method	Infrared Beam Triangulation via PSD & IR-LED
Usable Distance Ranging Window	$4.0 ext{ cm}$ to $30.0 ext{ cm}$ ( $1.57"$ to $11.81"$ )
Output Data Architecture	Analog Output Voltage ( $V_o$ ) Type
Operating Voltage Envelope	$4.5 ext{V}$ to $5.5 ext{V}$ DC ( $5.0 ext{V}$ Typical Target)
Average Supply Current Draw	$12 ext{ mA}$ Typical ( $22 ext{ mA}$ Maximum limit)
Output Voltage Differential	$pprox 2.25 ext{V}$ over the usable distance range
Typical Base Output Voltage	$0.4 ext{V}$ Typical at $30 ext{cm}$ range limit
Sampling Hardware Update Loop	$16.5 ext{ms} pm 4.0 ext{ms}$ standard cycle
Interfacing Connection Joggle	3-Pin JST-PH Female Header Port
Operating Climate Envelope	$-10^circ ext{C}$ to $+60^circ ext{C}$ ambient

How to Use & Formula Calibration

???? TECH TIP FOR POWER STABILITY: The internal IR-LED fires inside large, rapid current bursts. To prevent electrical noise from disrupting your microcontroller's rail stability, it is highly recommended to solder or place a $10mu ext{F}$ or larger electrolytic bypass capacitor directly across the power ( $V_{CC}$ ) and Ground ( $GND$ ) pins close to the sensor.

Pinout Mapping (Looking at the Back Harness Port):

Output Signal ( $V_{OUT}$ ): Analog output voltage wire (Typically Yellow or White). Connects to your ADC pin.
Ground ( $GND$ ): System common reference wire (Typically Black).
Power ( $V_{CC}$ ): Input supply connection wire (Typically Red). Connects to $+5 ext{V}$ rail.

Linearizing the Distance Calculation:

The output voltage curve of this sensor is non-linear and inversely proportional to the measured distance. To compute an approximate distance inside your software script, you can use a linearization formula mapping the inverse of the voltage ( $1/V$ ).

(Ensure your reading is bounded between 4cm and 30cm, as reading objects outside this window will yield ambiguous voltage returns mirror-matched onto the active curve).

Applications

Autonomous Cleaning & Personal Robots: Serves as a side-facing wall sensor or cliff detector for automated domestic appliances.
Touchless Sanitary Systems: Acts as an automatic trigger mechanism for touchless soap dispensers, hands-free faucets, and public dryers.
Robotic Mini-Sumo & Maze Solvers: Provides high-resolution, high-speed spatial proximity targeting for tracking opposing robots or mapping maze walls.
Interactive Amusement & Consumer Equipment: Used as a low-cost contactless gesture tracking button or proximity wake-up trigger for displays.
Industrial Conveyor Object Counting: Detects passed items on sorting conveyors safely without mechanical contact, irrespective of wrapping color shifts.

Package Includes

1 x SHARP GP2Y0A41SK0F Analog IR Distance Sensor Core Unit
1 x Matching 3-Pin JST-PH Compatible Interfacing Wire Harness Cable

Shipping & Delivery

Free shipping on orders above ₹999 across India
Dispatched within 1-3 business days
Expected delivery: 3-7 business days depending on location
Securely packaged in static-shielding wraps to protect internal micro-optics and PSD matrices