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Small green PCB with IR emitter, phototransistor, blue potentiometer and white Grove connector

Seeed Studio

Seeed Studio Grove Infrared Reflective Sensor v1.2

SKU CH-NR50-YJTAT

Detects objects up to 416 mm using an RPR-220 reflective photosensor with adjustable sensitivity and Grove plug-and-play socket

  • Product typeSensors
  • Detects objects up to 416 mm range using RPR-220 reflective photosensor
  • Adjustable sensitivity via on-board potentiometer for varied surfaces
  • Grove unified socket enables plug-and-play integration
  • Digital output signals object presence with on-board LED indicator
  • Built-in visible light filter reduces stray light interference

Grove Infrared Reflective Sensor v1.2

The Grove Infrared Reflective Sensor v1.2 is a compact module for detecting object presence within a defined range. It suits hobbyists, students and engineers building line-following robots, optical encoders or automation equipment. The sensor connects through a unified Grove socket for straightforward integration with compatible microcontroller boards.

Sustained detection behaviour

Under continuous operation the RPR-220 photosensor maintains stable output thanks to a built-in visible light filter and a rail-to-rail operational amplifier. The on-board LED indicator provides immediate visual feedback whenever reflected light is detected. Adjustable gain via the potentiometer lets the module retain consistent sensitivity across varying ambient lighting conditions.

416 mm detectable range

The sensor reliably detects objects up to 416 mm away, making this distance the key specification for deciding if the part fits your application. White or lighter surfaces reflect more effectively than darker ones, so actual trigger distance varies with target reflectivity. Buyers needing longer-range detection should consider alternative sensor types.

How it compares

Measured against everything we stock in Sensors, Transducers & Thermometers, at today’s prices. Recalculated every night.

Price $17.99
Cheaper than about 80% of the 255 comparable items (median $39.99).

Specifications

Product
Product typeSensors

Questions about this item

Does the RPR-220 sensor draw noticeable power when it runs continuously?

The module uses a low-current IR LED and phototransistor pair, so power draw stays minimal during all-day operation.

What controller or board must I already have to use the Grove unified socket?

Any development board with a Grove-compatible 4-pin connector — such as an Arduino shield, Raspberry Pi HAT or Seeed Wio — will plug straight in.

Will the 416 mm detection range still work reliably with older 5 V logic boards?

Yes, the rail-to-rail op-amp and adjustable potentiometer let you tune sensitivity so the digital output remains clean on legacy 5 V systems.

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