Photo Sensor 1m Sensing Distance, Dark ON, NPN Open Collector - BTS1M-TDTD

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65.00 Grams


Autonics W 7.2 mm Photoelectric Sensor, BTS1M-TDTD

NPN open collector, Cable type connection, Dark ON


The Autonics photoelectric sensor BTS1M-TDTD is Through-beam sensing type, sensing distance of 1m, Response time of Max. 1ms. The W 7.2 mm 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
  • 1m sensing distance
  • Opaque material of min. Ø2mm sensing target
  • Red LED (650nm) Light source
  • 12-24 VDC ±10% (ripple P-P: max. 10%) power supply
  • NPN open collector control output
  • Operation mode: Dark ON
  • W 7.2 × H 18.6 × L 9.5
  • IP67 ingress protection structure according to IEC standards


This Autonics photoelectric sensor's case is made of Polybutylene terephthalate and its Sensing part is made of Polymethyl methacrylate.

The BTS1M-TDTD features IP67 ingress protection.


The Autonics sensor BTS1M-TDTD features standard cable type connection. This cable covers the sensor's 3 wires. It is Ø2.5mm in diameter and 2 meters in length.

Sensing specifications

The sensing target for this photoelectric sensor is Opaque material of min. Ø2mm. The maximum distance that this sensor can detect its standard sensing target is 1m. This so-called sensing distance differs from one sensing target to another, based on their material.

Control output

The BTS1M-TDTD features NPN open collector control output. NPN stands for Negative-Positive-Negative transistors.


There are limitations in temperature and humidity in which BTS1M-TDTD photoelectric sensor is used:

  • Storage temperature: -30 … 70°C
  • Storage humidity: 35 to 85%RH
  • Ambient temperature: -20 … 55°C
  • Ambient humidity: 35 to 85%RH

Environment resistance is rated at no freezing or condensation.

Industries / Applications

  • Potato chip manufacturing and packaging process
  • Brake Disc Manufacturing
  • Transfer of Packaged Goods


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

Series Information

BTS Series

Ultra-Compact, Slim Type Photoelectric Sensors

The Autonics BTS series ultra-compact, slim type photoelectric sensors are ideal for installation in limited spaces and compact applications. The sensors measure just 7.2 mm wide, come equipped with built-in amplifiers and are capable of detecting tiny objects including metallic wires and semiconductor chips. The BTS Series is also built with IP67 protection structure and stainless steel mounting brackets, providing durable and reliable sensing solutions in diverse environments.

BTS Series Main features

  • Ultra-slim width of only 7.2 mm

          - W 7.2 x H 18.6 x L 9.5 mm (through-beam type)

          - W 7.2 x H 24.6 x L 10.8 mm (retroreflective type, convergent reflective type)

  • Detection methods and minimum target size

          - Through-beam type (BTS1M): Ø2 mm

          - Retroreflective type (BTS200): Ø2 mm (at distance 100 mm)

          - Convergent reflective type (BTS15/BTS30): Ø0.15 mm (at distance 10 mm)

  • Detecting distance may vary by environmental factors
  • Maximum detection distance: 1 m (through-beam type)
  • Stability indicator (green LED) and operation indicator (red LED)
  • Stainless steel 304 mounting brackets
  • IP67 protection structure (IEC standard)

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 BTS1M-TDTD 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. Ø2mm
Light source:
Red LED(650nm)
Response time:
Max. 1ms
Power supply:
12-24VDC ±10%(ripple P-P: max. 10%)
Current consumption:
Emitter/Receiver: Max. 20mA
Operation mode:
Dark ON
Control output:
NPN open collector
Connection type:
Cable type(Ø2.5, 2m)
Environment_Ambient illumination:
Sunlight: Max. 10,000lx, Incandescent lamp: Max. 3,000lx (received illumination)
Environment_Ambient temperature:
-20 to 55℃, storage: -30 to 70℃
Protection structure:
Environment_Ambient humidity:
35 to 85% RH, storage: 35 to 85% RH
Case: Polybutylene terephthalate, Sensing part: Polymethyl methacrylate, Bracket: Stainless steel 304,,Bolt: Carbon steel wire for cold heading(SWCH10A)
Approx. 65g(approx. 40g)
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