Autonics Photo Sensor, Through beam, 1m Sensing Distance, Light On, PNP Output, 12-24VDC


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BTF series realize 3.7mm ultra-slim size by adopting high performance one chip photo IC which Autonics self-developed so that it can be installed in narrow space and check the location sensing spot by using red LED visible light source. Not only minimizing the influence of background with BGS sensing, the series can detect microscopic non-glossy objects up to Ø0.2mm. Excellent sensing performance with IP67 is another feature of BTF series.

Main features

● Realization of ultra-slim size by adopting one-chip photo IC
● Size: Through-beam(W13×H19×L3.7mm), Diffuse reflective, BGS reflective(W13×H24×L3.7mm)
● Adopts BGS method superior than convergent reflective to minimize error by background color, or material of sensing object for stable sensing
● Visible light source to check the position of sensing spot and superior to small sensing target with narrow sensing width
● Built-in reverse polarity, output short, overcurrent protection circuit
● Protection structure IP67(IEC standard)


* Detecting wafers in semiconductor equipment



Model NPN open collector output BTF1M-TDTL BTF1M-TDTD BTF30-DDTL BTF30-DDTD BTF15-BDTL BTF15-BDTD
Sensing type Through-beam Diffuse reflective BGS reflective
Sensing distance 1m 5 to 30mm (Non-glossy white paper 50x50mm) 1 to 15mm (Non-glossy white paper 50x50mm)
Sensing target Opaque materials of max. Ø2 Opaque materials, Translucent materials
Min.sensing target Opaque materials of Ø2 Ø0.2
(Sensing distance 10mm)
Ø0.2 non-illuminated objects
(Sensing distance 10mm)
Hysteresis - Max. 20% at rated sensing distance Max. 5% at rated sensing distance
Reflectivity characteristics (black/white error) - - Max. 15% of maximum sensing distance
Response time Max. 1ms
Power supply 12-24VDC ±10%(Ripple P-P: Max. 10%)
Current consumption Max. 20mA(This is for each emitter and receiver of through-beam type)
Light source Red LED(650nm)
Operation mode Light ON Dark ON Light ON Dark ON Light ON Dark ON
Control output NPN or PNP open collector output
• Load voltage: Max. 26.4VDC  • Load current: Max. 50mA  • Residual voltage - NPN:Max. 1V, PNP:Max. 2V
Protection circuit Reverse polarity protection, output short-circuit protection
Indicator Operation indicator: Red, Stability indicator: Green
Insulation resistance Min. 20MΩ(at 500VDC megger)
Noise resistance ±240V the square wave noise(pulse width:1µs) by the noise simulator
Dielectric strength 1.000VAC 50/60Hz for 1 minute
Vibration 1.5mm or 300m/s2 amplitude at frequency of 10 to 55Hz(for 1 min.) in each of X, Y, Z directions for 2 hours
Shock 500m/s2(approx. 50G) in each of X, Y, Z directions for 3 times
Environment Ambient illumination Sunlight: Max. 10,000lx Incandescent lamp: Max. 3,000lx(Receiver illumination)
Ambient temperature -25 to 55°C, storage: -40 to 70°C
Ambient humidity 35 to 85%RH, storage: 35 to 85%RH
Protection IP67(IEC standards)
Material Case: PBT, Sensing part: PMMA
Cable Ø2.5, 3-wire, Length: 2m (Emitter of through-beam type: Ø2.5, 2-wire, Length: 2m)
(AWG28, Core diameter: 0.08mm, Number of cores: 19, Insulator out diameter: Ø0.9)
Accessory Fixing bracket(SUS304), Bolt(SWCH10A)
Approval CE
Unit weight Approx. 40g Approx. 25g
Document download
† The temperature or humidity mentioned in Environment indicates a non freezing or condensation environment.




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