Reflectance sensing modules use infrared illumination and a photodetector to measure surface brightness. They are compact, simple to mount and affordable, making them useful for line-following robots, edge detection and surface sensing on embedded projects. Arrays provide multiple sensing points for robustness, while single-sensor modules fit tight footprints. Outputs vary from analogue voltages per sensor to digital-level signals, allowing easy interfacing with microcontrollers or logic circuits.
Design emphasis is on reliable, straightforward integration and power efficiency: LED strings can be arranged to reduce current, and some versions let you switch illumination off for sensing or power saving. These older generation sensors offer practical, well-understood performance for robotics and automation projects.
Code: SEN-10061
The QTR-1A reflectance sensor carries a single infrared LED and phototransistor pair in an inexpensive, tiny 0.5" x 0.3" module that can be mounted almost anywhere and is great for edge detection and line following. The reflectance measurement is output as an analogue voltage. More Details...
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Code: SEN-10065
The QTR-1RC reflectance sensor carries a single infrared LED and phototransistor pair in an inexpensive, tiny 0.5" x 0.3" module that can be mounted almost anywhere and is great for edge detection and line following. The output is designed to be measured by a digital I/O line. More Details...
In stock in Australia
Shipping from $4.90
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Code: SKU-003242
This compact module packs three IR LED/phototransistor pairs onto a 1.25″ × 0.3″ board. The sensors are mounted on a 0.375″ pitch, allowing this array to be used as a minimal detector for a line-following robot. Each sensor provides a separate digital I/O-measurable voltage output . More Details...
In stock in Australia
Shipping from $9.90
+114 more from our supplier in 7-10 days
Code: SEN-10017
This sensor module has 8 IR LED/phototransistor pairs mounted on a 0.375" pitch, making it a great detector for a line-following robot. Pairs of LEDs are arranged in series to halve current consumption, and a MOSFET allows the LEDs to be turned off for additional sensing or power-savings options. More Details...
In stock in Australia
Shipping from $9.90
+302 more from our supplier in 7-10 days
Code: SKU-003241
This compact module packs three IR LED/phototransistor pairs onto a 1.25″ × 0.3″ board. The sensors are mounted on a 0.375″ pitch, making this array a great minimal sensing solution for a line-following robot. Each sensor provides a separate analogue voltage output . More Details...
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Code: SKU-002442
This sensor module has 8 IR LED/phototransistor pairs mounted on a 0.375" pitch, making it a great detector for a line-following robot. Pairs of LEDs are arranged in series to halve current consumption, and a MOSFET allows the LEDs to be turned off for additional sensing or power-savings options. More Details...
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Code: SKU-003239
The QTR-L-1A reflectance sensor incorporates a right-angle infrared LED and a right-angle phototransistor in an inexpensive, tiny 0.35″ × 0.3″ module that can be mounted almost anywhere and is great for edge detection and line following. More Details...
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Shipping from $9.90
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Code: SKU-003240
The QTR-L-1RC reflectance sensor incorporates a right-angle infrared LED and a right-angle phototransistor in an inexpensive, tiny 0.35″ × 0.3″ module that can be mounted almost anywhere and is great for edge detection and line following. More Details...
Special Order
Shipping from $9.90
+283 more from our supplier in 7-10 days
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