3522_0 - Sharp Distance Sensor (20-150cm)


Product Features

Using reflected IR light, measure the distance of an opaque object 20-150cm away. Requires an IR Distance Adapter to be used with Phidgets.

Product Description


This popular sensor made by Sharp produces an analog output that varies from 2.5V at 20cm to 0.4V at 150cm.

Based on "typical values" from Sharp, the formula to translate SensorValue into Distance (the formula is only valid for a SensorValue between 80 to 490) is:

Distance (cm) = 9462/(SensorValue - 16.92)

This sensor can find the distance to objects that present a very narrow edge such as a wall at a very sharp angle.

Note: The output of this sensor will vary from unit to unit, and based on the characteristics of the target (reflectance, size, direction of motion, object alignment, ...). Our formula is based on the data provided by Sharp. If you find that you are not getting good results with the standard formulas, you may want to derive your own formula to better characterize your situation.


This sensor connects to:


The sensor plugs in the 1101 - IR Distance Adapter using the 30cm interface cable that comes with the 1101.


Accuracy Graph




All measurements are based on data provided by Sharp who used an r-27 calibration card, 90% reflectance. Based on our formula, we have calculated a minimum and maximum distance with the card at minimum and maximum distance.

Related Products


We also carry two other Sharp distance sensors for shorter distance ranges.




If you are not getting good results with the standard formula, have a look at the product datasheet which has good notes on what can affect the sensor's performance


Product Specifications


Sensor Properties

Sensor Type Distance (Infrared)
Sensor Output Type Ratiometric
Measurement Distance Min 200 mm
Measurement Distance Max 1.5 m
Response Time Max 50 ms


Electrical Properties

Supply Voltage Min 4.5 V DC
Supply Voltage Max 5.5 V DC
Current Consumption Max 50 mA


Physical Properties

Weight 6 g
Operating Temperature Min -10 °C
Operating Temperature Max 60 °C