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IDEC
SA2E-NN3C
Miniature Photoelectric Small-Beam Reflective Sensor, 50-150mm Adjustable Sensing Range, NPN, Light On/Dark On (Selectable), M8 4-Pin Connector, IP67, 10.8 x 19.5 x 31.5mm (WDH) Excluding LEDs and Controls, NCNR
$52.62$52.62 -
IDEC
SA2E-PN3-2M
Miniature Photoelectric Polarized Retroreflective Sensor, Red LED, NPN, 5m Sensing Range (Depends on the Reflector), Opaque Detectable Object, 0.5ms, Single Turn Sensitivity Control, Light On/Dark On (Selectable), 2m Cable, IP67, –30 to +55
$43.99$43.99 -
IDEC
SA2E-PN3C
Miniature Photoelectric Polarized Retroreflective Sensor, 1.3 to 5m Sensing Range with Sensitivity Adjustment, NPN, Light On/Dark On (Selectable), M8 4-Pin Connector, IP67, 10.8 x 19.5 x 31.5mm (WDH) Excluding LEDs and Controls
$36.81$36.81 -
IDEC
SA2E-TN3C
Miniature Photoelectric Thru-Beam Sensor, 20m Sensing Range, NPN, Light On/Dark On (Selectable), M8 4-Pin Connector, IP67, 10.8 x 19.5 x 31.5mm (WDH) Excluding LEDs and Controls
$57.58$57.58 -
$97.00$97.00 -
Takex
UM-R3T
Photoelectric Sensor, Diffuse Reflective, NPN, Reflective, Red LED, 2 to 30mm Range, Cable, Ultra Mini, Light ON, Embedded Amplifier
$87.55$87.55 -
Takex
UM-R3TV
Photoelectric Sensor, Diffuse Reflective, NPN, Red LED, 2 to 30mm Range, Cable, Ultra Mini, Light ON, Embedded Amplifier, In-Line Sensitivity Adjustment Volume Provided
$112.20$112.20 -
Takex
UM-R5T
Photoelectric Sensor, Amplifier, Diffuse, NPN, Reflective, Red LED, 50mm Range, Cable, Ultra Mini
$87.55$87.55 -
Takex
UM-R5TV
Photoelectric Sensor, Amplifier, Diffuse, NPN, Reflective, Red LED, 50mm Range, Cable, Ultra Mini
$112.20$112.20 -
Takex
UM-T50DS
Photoelectric Sensor Set, Thru-Beam, NPN, Red LED, 500mm Range, Cable, Ultra Miniature
$116.45$116.45 -
Takex
UM-T50DSV
Photoelectric Sensor, Thru-Beam, NPN, Red LED, Transmitter/Reciever, 500mm Range, Cable, Mini
$136.85$136.85 -
Takex
UM-T50DTV
Photoelectric Sensor, Thru-Beam, NPN, Red Led, Transmitter/Receiver, 500mm, Cable, Ultra Mini
$140.68$140.68
Photoelectric sensors detect the distance, absence or presence of an object. These sensors are great for sensing long distances and detecting most materials.
How Does a Photoelectric Sensor Work?
Generally a photoelectric sensor consists of the following:
- Transmitter - emits the light beam
- Receiver - detects the light beam and converts it to an electrical signal
Photoelectric sensors detect changes in the light beam caused by the presence/absence, movement or properties of an object.
Types of Photoelectric Sensors:
- Through-Beam (Thru-Beam)
- Transmitter and receiver are two separate units that are directly opposite of each other. The sensor detects when an objects breaks the light beam
- Great for long distance detection
- Ideal for conveyors, counting or monitoring door openings
- Retroreflective (Reflective Mode)
- Transmitter and receiver are in one housing; light beam is reflected back by a reflector. Detection is triggered when an object breaks the beam.
- Medium range detection and easier to install than a through beam
- Ideal for package detection and pallet positioning
- Diffuse (Proximity Mode)
- The transmitter and receiver in one housing; the sensor detects light reflected directly off the target object (no reflector needed)
- Best for short range applications
- Ideal for detecting objects on assembly lines, verifying presence or checking fill level
- Specialized Types:
- Background Suppression: Can ignore objects beyond a set distance, focuses close range
- Color or Contrast Sensors: Detects specific colors or contrast differences
- Distance Measuring Sensors: Mesaure the distance to an object
Categories Related to Photoelectric Sensors:
- Stack lights - signal towers visually communicate the data or alerts that the photoelectric sensors are generating
- Smart relays - photoelectric sensors provide input signals which can process the data and control outputs
- Pushbuttons and estops - if your sensor detects a fault, an operator can use a pushbutton to reset the system
- HMIs - HMIs can dispay the data from the photoelectric sensor which allows you to monitor processes