Photo Sensor 3 m Sensing Distance, Dark ON, Cable Type - BM3M-TDT1,2

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170.00 Grams


Autonics General Photoelectric Sensor, BM3M-TDT1,2

NPN open collector, Cable type connection, Infrared LED

The Autonics photoelectric sensor BM3M-TDT1,2 is Through-beam sensing type, comes in a rectangular shape, sensing distance of 3m, Response time of Max. 3ms and rectangular installation. The standard general 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. Ø8mm sensing target
  • Infrared LED (940nm) Light source
  • 12-24 VDC ±10% (ripple P-P: max. 10%) power supply
  • NPN open collector control output
  • Operation mode: Dark ON
  • Fixed sensitivity
  • Reverse power protection circuit, output short overcurrent protection circuit


This Autonics photoelectric sensor's case is made of Acrylonitrile butadiene styrene, its Sensing part is made of Polycarbonate.


The Autonics sensor BM3M-TDT1,2 features standard cable type connection. This cable covers the sensor's 3 wires. It is Ø4mm in diameter and 2 meters in length.

Sensing specifications

The sensing target for this photoelectric sensor is Opaque material of min. Ø8mm. 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 BM3M-TDT1,2 features NPN open collector control output. NPN stands for Negative-Positive-Negative transistors.


There are limitations in temperature and humidity in which BM3M-TDT1,2 photoelectric sensor is used:

  • Storage temperature: -25 … 70°C
  • Storage humidity: 35 to 85%RH
  • Ambient temperature: -10 … 60°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

BM Series

Economical General-Purpose Photoelectric Sensors

The Autonics BM series photoelectric sensors are easy to install and use in various industrial applications. The sensors feature built-in reverse polarity protection circuits and diffuse reflective type models feature built-in sensitivity adjusters. The BM series is available in through-beam type, retroreflective type, and diffuse reflective types.

BM Series Main features

  • Various detection types available: through-beam, retroreflective, diffuse reflective
  • Sensitivity adjuster (diffuse reflective type)
  • Easy bolt/screw installation
  • Built-in reverse polarity 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 BM3M-TDT1,2 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. Ø8mm
Light source:
Infrared LED(940nm)
Response time:
Max. 3ms
Power supply:
12-24VDC ±10%(ripple P-P: max. 10%)
Current consumption:
Emitter/Receiver: Max. 45mA
Sensitivity adjustment:
Operation mode:
Dark ON
Control output:
NPN open collector
Connection type:
Cable type(Ø4, 2m)
Environment_Ambient illumination:
Sunlight: Max. 11,000lx, Incandescent lamp: Max. 3,000lx (received illumination)
Environment_Ambient temperature:
-10 to 60℃, storage: -25 to 70℃ Approval
Environment_Ambient humidity:
35 to 85% RH, storage: 35 to 85% RH
Case: Acrylonitrile butadiene styrene, Sensing part: Polycarbonate, Bracket: Steel plate cold commercial, Bolt: Steel chromium molybdenum, Nut: Steel chromium molybdenum
Fixing bracket, Bolts, Nuts
Approx. 170g
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