Medium Density (MD) QTR Arrays

Medium Density (MD) QTR Arrays

Medium-density reflectance arrays pair IR emitters with phototransistors at modest spacing for reliable line sensing, edge detection, surface contrast measurement and short-range proximity tasks. Multi-channel strips let systems compute a line centroid or scan across a surface while single-channel modules suit spot checks or distributed sensing.

Analogue outputs provide graduated reflectance values for precise position and calibration. RC-style digital outputs give simple thresholded signals with timing-based reading. Variants include long-range and low-current options, and differences in pitch, board size and LED drive affect footprint, detection distance, power draw and integration effort. These modules are compact, easy to mount and interface directly with common microcontrollers.

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QTR-MD-16RC Reflectance Sensor Array: 16-Channel, 8mm Pitch, RC Output

Code: SKU-005312

pitch × sensors size (mm) output max current optimal range LED board 8 mm × 16 125.0 × 16.5 RC (digital) 30 mA 250 mA 5 mm This array of IR LED/phototransistor pairs is great for precisely identifying changes in reflectance (like line detection).

$ 24.95

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QTRX-MD-16RC Reflectance Sensor Array: 16-Channel, 8mm Pitch, RC Output, Low Current

Code: SKU-005314

pitch × sensors size (mm) output max current optimal range LED board 8 mm × 16 125.0 × 16.5 RC (digital) 3.5 mA 34 mA 10 mm This array of IR LED/phototransistor pairs is great for precisely identifying changes in reflectance (like line detection).

$ 40.95

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QTR-MD-01A Reflectance Sensor: 1-Channel, 7.5mm Wide, Analog Output

Code: SKU-004912

sensors size (mm) output max current optimal range LED board 1 7.5 × 20.0 analogue 30 mA 32 mA 5 mm This IR LED/phototransistor pair is great for precisely identifying changes in reflectance (like line detection).

$ 3.55

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QTR-MD-01A-S Reflectance Sensor: 1-Channel, 8mm Wide, Analog Output, Side-Entry Connector

Code: SKU-010857

sensors size (mm) output max current optimal range connec­tor LED board 1 8.1 × 15.2 analogue 30 mA 32 mA 5 mm side-entry This sensor uses an IR LED and a phototransistor to measure the light reflected from nearby surfaces.

$ 4.95

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QTR-MD-01RC Reflectance Sensor: 1-Channel, 7.5mm Wide, RC Output

Code: SKU-004910

sensors size (mm) output max current optimal range LED board 1 7.5 × 20.0 RC (digital) 30 mA 32 mA 5 mm This IR LED/phototransistor pair is great for precisely identifying changes in reflectance (like line detection).

$ 3.55

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QTR-MD-01RC-S Reflectance Sensor: 1-Channel, 8mm Wide, RC Output, Side-Entry Connector

Code: SKU-010856

sensors size (mm) output max current optimal range connec­tor LED board 1 8.1 × 15.2 RC (digital) 30 mA 32 mA 5 mm side-entry This sensor uses an IR LED and a phototransistor to measure the light reflected from nearby surfaces.

$ 4.95

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QTR-MD-02A Reflectance Sensor Array: 2-Channel, 8mm Pitch, Analog Output

Code: SKU-004985

pitch × sensors size (mm) output max current optimal range LED board 8 mm × 2 13.0 × 20.0 analogue 30 mA 32 mA 5 mm This array of IR LED/phototransistor pairs is great for precisely identifying changes in reflectance (like line detection).

$ 4.45

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QTR-MD-02RC Reflectance Sensor Array: 2-Channel, 8mm Pitch, RC Output

Code: SKU-004980

pitch × sensors size (mm) output max current optimal range LED board 8 mm × 2 13.0 × 20.0 RC (digital) 30 mA 32 mA 5 mm This array of IR LED/phototransistor pairs is great for precisely identifying changes in reflectance (like line detection).

$ 4.45

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QTR-MD-03A Reflectance Sensor Array: 3-Channel, 8mm Pitch, Analog Output

Code: SKU-004973

pitch × sensors size (mm) output max current optimal range LED board 8 mm × 3 21.0 × 20.0 analogue 30 mA 62 mA 5 mm This array of IR LED/phototransistor pairs is great for precisely identifying changes in reflectance (like line detection).

$ 4.95

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QTR-MD-03RC Reflectance Sensor Array: 3-Channel, 8mm Pitch, RC Output

Code: SKU-004972

pitch × sensors size (mm) output max current optimal range LED board 8 mm × 3 21.0 × 20.0 RC (digital) 30 mA 62 mA 5 mm This array of IR LED/phototransistor pairs is great for precisely identifying changes in reflectance (like line detection).

$ 4.95

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+117 more from our supplier in 7-10 days