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                                                                                                  1. Home
                                                                                                  2. Sensors & Transducers
                                                                                                  3. Sensors
                                                                                                  4. Optical Sensors
                                                                                                  5. Photoelectric Sensors
                                                                                                  Print Page

                                                                                                  SEN0503

                                                                                                  IR Break Beam Sensor, 1.64ft, NPN/SPST-NO, 0.1A, 3 to 5VDC

                                                                                                  DFROBOT
                                                                                                  Image is for illustrative purposes only. Please refer to product description.
                                                                                                  DFROBOT SEN0503
                                                                                                  DFROBOT SEN0503
                                                                                                  DFROBOT SEN0503
                                                                                                  DFROBOT SEN0503
                                                                                                  DFROBOT SEN0503
                                                                                                  DFROBOT SEN0503
                                                                                                  ManufacturerDFROBOT
                                                                                                  Manufacturer Part NoSEN0503
                                                                                                  Newark Part No.85AK9706
                                                                                                  Your Part Number
                                                                                                  Technical Datasheet

                                                                                                  Data Sheet

                                                                                                  See all Technical Docs
                                                                                                  Available to Order
                                                                                                  Delivery estimated post order confirmations.You will be charged on dispatch.
                                                                                                  QuantityPrice
                                                                                                  1+$11.170
                                                                                                  100+$9.390
                                                                                                  250+$8.720
                                                                                                  500+$8.200
                                                                                                  1000+$7.800
                                                                                                  Price for:Each
                                                                                                  Minimum: 1
                                                                                                  Multiple: 1
                                                                                                  $11.17
                                                                                                  Line Note
                                                                                                  Added to your Order Confirmation, Invoice, and Dispatch note for this order only.

                                                                                                  Product Information

                                                                                                  DFROBOT
                                                                                                  ManufacturerDFROBOT
                                                                                                  Manufacturer Part NoSEN0503
                                                                                                  Newark Part No.85AK9706
                                                                                                  Technical Datasheet

                                                                                                  Data Sheet

                                                                                                  Sensor TypeIR Break Beam Sensor
                                                                                                  Sensing Distance Max500mm
                                                                                                  Sensing MethodThrough Beam
                                                                                                  Output TypeNPN
                                                                                                  Product Range-
                                                                                                  Connection Method250mm Cable
                                                                                                  Supply Voltage Min3V
                                                                                                  Supply Voltage Max5V
                                                                                                  Light SourceInfrared LED
                                                                                                  Qualification-
                                                                                                  IP Rating-
                                                                                                  Operating Temperature Min-25°C
                                                                                                  Operating Temperature Max60°C
                                                                                                  SVHCNo SVHC (04-Feb-2026)

                                                                                                  Product Overview

                                                                                                  SEN0503 is an IR break beam sensor. This infrared break-beam sensor is a simple way to detect motion. This IR break beam sensor works up to 50cm with a fast and stable response of <2ms. With a small size of 20 x 10 x 9mm, the module can be conveniently installed in a narrow space. Besides, it can operate within a temperature of -25°C to 60°C. Power the sensor by a voltage of DC 3.0 to 5V. It can be used with Arduino for some simple motion detection, speed detection, timing, etc. in smart robot competitions. This works by having an emitter side that sends out a beam of human-invisible IR light, then a receiver across the way which is sensitive to that same light. When something passes between the two, and it’s not transparent to IR, then the “beam is broken“ and the receiver will output a signal to let you know. Application includes simple motion detection, speed detection, timing.

                                                                                                  • Fast and stable response speed
                                                                                                  • Can be conveniently installed in a narrow space
                                                                                                  • Induction distance is 50CM / (5V), 20CM / (3.3V)
                                                                                                  • Induction method: through-beam type (non-transparent)
                                                                                                  • Working current is 25mA, output current is 100mA (can directly drive the relay)
                                                                                                  • Output mode: NPN normally open, emitting angle: straight line (infrared light)
                                                                                                  • Receiving angle: <10°, response time: 2ms, Transmitter: red wire=5V DC, black wire=GND
                                                                                                  • Working environment: indoor (not waterproof), light hole: 3mm
                                                                                                  • Dimension is (L x W x H) 20 x 10 x 9mm, cable length is 25cm
                                                                                                  • Working temperature range from -25°C to 60°C

                                                                                                  Contents

                                                                                                  IR break beam sensor (50cm) - receiver x1, IR break beam sensor (50cm) - transmitter x1.

                                                                                                  Technical Specifications

                                                                                                  Sensor Type

                                                                                                  IR Break Beam Sensor

                                                                                                  Sensing Method

                                                                                                  Through Beam

                                                                                                  Product Range

                                                                                                  -

                                                                                                  Supply Voltage Min

                                                                                                  3V

                                                                                                  Light Source

                                                                                                  Infrared LED

                                                                                                  IP Rating

                                                                                                  -

                                                                                                  Operating Temperature Max

                                                                                                  60°C

                                                                                                  Sensing Distance Max

                                                                                                  500mm

                                                                                                  Output Type

                                                                                                  NPN

                                                                                                  Connection Method

                                                                                                  250mm Cable

                                                                                                  Supply Voltage Max

                                                                                                  5V

                                                                                                  Qualification

                                                                                                  -

                                                                                                  Operating Temperature Min

                                                                                                  -25°C

                                                                                                  SVHC

                                                                                                  No SVHC (04-Feb-2026)

                                                                                                  Technical Docs (1)

                                                                                                  Technical Data Sheet EN

                                                                                                  Legislation and Environmental

                                                                                                  US ECCN:Unknown
                                                                                                  EU ECCN:Unknown
                                                                                                  RoHS Compliant:Yes

                                                                                                  RoHS

                                                                                                  RoHS Phthalates Compliant:Yes

                                                                                                  RoHS

                                                                                                  SVHC:No SVHC (04-Feb-2026)
                                                                                                  Download Product Compliance Certificate

                                                                                                  Product Compliance Certificate

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