Photo Sensor 3 m, NPN Open Collector Output - BYD3M-TDT

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500.00 Grams


Autonics Photoelectric Sensor with Built-in Timer, BYD3M-TDT

NPN Open collector, Cable type connection, Front operation indicator

The Autonics photoelectric sensor BYD3M-TDT is through-beam sensing type, comes in a rectangular shape, sensing distance of 3m, Response time of Max. 1ms and rectangular installation. The standard rectangular photo sensor can be used in diverse applications requiring non-contact detection of Opaque material.

As a quick report, this photoelectric sensor provides:

  • Through-beam sensing type
  • 3m sensing distance
  • Opaque material of min. Ø6mm sensing target
  • Infrared LED Light source
  • 12-24VDC ±10% (ripple P-P: max. 10%) power supply
  • NPN open collector control output
  • Operation mode: Dark ON (option: Light ON)
  • Fixed Sensitivity adjustment
  • Operation indicator (red)
  • IP64 ingress protection structure according to IEC standards
  • W12×H32×L18 mm


This Autonics photoelectric sensor's case is made of acrylonitrile butadiene styrene and its Sensing part is made of acrylic.

The BYD3M-TDT features IP64 ingress protection.


The Autonics sensor BYD3M-TDT features standard cable type connection. This cable covers the sensor's 3 wires. It is Ø3.5mm in diameter and 2 meters in length.

Sensing specifications

The sensing target for this photoelectric sensor is Opaque material of min. Ø6mm. The maximum distance that this sensor can detect its standard sensing target is 3m. This so-called sensing distance differs from one sensing target to another, based on their material.

Control output

The BYD3M-TDT features NPN open collector control output. NPN stands for Negative-Positive-Negative transistors.


There are limitations in temperature and humidity in which BYD3M-TDT photoelectric sensor is used:

  • Storage temperature: -25 … 70°C
  • Storage humidity: 35 to 85%RH
  • Ambient temperature: -25 … 65°C
  • Ambient humidity: 35 to 85%RH

Environment resistance is rated at no freezing or condensation.


Still want to know more? Click here to find out about Autonics Photoelectric Sensors working principles.

Series Information

BYD Series

Compact Photoelectric Sensors

The Autonics BYD series compact photoelectric sensors with built-in amplifiers offer high performance and value. The compact size and various detection methods make it ideal for various user applications. The sensors are available in through-beam, diffuse reflective, and convergent reflective types. Additionally, BYD30-DDT-U and BYD50-DDT-U models have operation indicators located on the top side for users to better identify operation status.

BYD Series Main features:

  • Compact size: W12×H32×L18 mm
  • Performance unaffected by color of the target object (convergent reflective type)
  • Operation indicator (red LED) (BYD30-DDT-U, BYD50-DDT-U models : indicator located on the top side)
  • Timer function to set OFF delay time (0.1 to 2 sec) (convergent reflective type)
  • Built-in reverse polarity protection circuit and output overcurrent (short-circuit) protection circuit

About Autonics Photoelectric Sensors

"Autonics" is a leading provider of automation solutions from South Korea. Autonics products are trusted and adopted by engineers in various industrial applications and their technology is widely applied in day-to-day automation devices. This company represents 21 Photoelectric Sensors series:

  • BRQ Series: Cylindrical Photoelectric Sensors
  • BJ SeriesCompact High Performance Photoelectric Sensors
  • BJX Series: Compact Long Distance Photoelectric Sensors
  • BR(NARROW BEAM REFLECTIVE) Series: Cylindrical Photoelectric Sensors (Narrow Beam Reflective Type)
  • BTF Series: Ultra-Compact, Thin Type Photoelectric Sensors
  • BTS Series: Ultra-Compact, Slim Type Photoelectric Sensors
  • BL Series: Liquid Level Photoelectric Sensors
  • BJR Series: Oil-Resistant/Oil-Proof Photoelectric Sensors
  • BYD Series: Compact Photoelectric Sensors
  • BM Series: Economical General-Purpose Photoelectric Sensors
  • BH Series: Front/Side Mount Photoelectric Sensors
  • BJP Series: Photoelectric Sensors for PCB Detection
  • BUM Series: 4-Channel U-Shaped Photoelectric Sensors
  • BA Series: Diffuse Reflective Photoelectric Sensors with Long Sensing Distance
  • BMS Series: Side Sensing Type Photoelectric Sensors
  • BX Series: Universal AC/DC Photoelectric Sensors (Wire Terminal Type)
  • BUP Series: U-Shaped Photoelectric Sensors
  • BEN Series: Universal AC/DC Photoelectric Sensors
  • BPS Series: Flat Type Photoelectric Sensors
  • BY Series: Compact Photoelectric Sensors with Synchronous Detection
  • BC Series: Color Mark Sensors

Autonics Photoelectric Sensors are mainly used in:

  • Automotive industry
  • Packaging industry
  • Elevator Industry
  • Semiconductor/Display Industry
  • Machine Tools Industry
  • Plastics/Rubber Industry
  • Food/beverage Manufacturing
  • Logistics Industry


You may be interested to see this product's catalog. If so, please click to view the BYD3M-TDT datasheet.
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Warranty Information

One Year Warranty
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Additional Information

Sensing type:
Through-beam type
Sensing distance:
Sensing target:
Opaque material of min. Ø6mm
Light source:
Infrared LED
Response time:
Max. 1ms
Power supply:
12-24VDC ±10%(ripple P-P: max. 10%)
Current consumption:
Emitter/Receiver: Max. 30mA
Sensitivity adjustment:
Operation mode:
Dark ON(option: Light ON)
Control output:
NPN open collector
Connection type:
Cable type(Ø3.5, 2m)
Environment_Ambient illumination:
Sunlight: Max. 11,000lx, Incandescent lamp: Max. 3,000lx (received illumination)
Environment_Ambient temperature:
-20 to 65℃, storage: -25 to 70℃
Protection structure:
IP64 Approval
Environment_Ambient humidity:
35 to 85% RH, storage: 35 to 85% RH
Case: Acrylonitrile butadiene styrene, Sensing part: Acrylic, Bracket: Steel Plate Cold Commercial, Bolt: Steel Chromium molybdenum, Nut: Steel Chromium molybdenum, Sleeve: Brass, Ni-plate
Fixing bracket A, M3 Screws, Nuts
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