Fiber Optic Sensor Cable Type, NPN Open Collector Output - BF3RX

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230.00 Grams
Minimum Purchase:
1 unit


Autonics Volume Adjustment Fiber Optic Amplifier - BF3RX

Red LED, Sensitivity adjuster, NPN, Cable type connection


The Autonics fiber optic sensor BF3RX is used to provide accurate detection of objects in various applications. This sensor is available in Built-in twin volume type and manual in sensitivity setting (adjuster).

As a quick report, this fiber optic sensor provides:

  • Built-in twin volume type
  • Red LED (660nm) Light source
  • 2m Cable length
  • Amplifier
  • Max. 1ms Response time
  • 12-24 VDC ±10% (ripple P-P: max. 10%) Power supply
  • Light ON/Dark ON (set by control wire) Operation mode
  • NPN open collector
  • Sensitivity adjuster (coarse adjustment, fine adjustment)
  • Reverse power protection circuit, output short overcurrent protection circuit


This Autonics fiber optic sensor's case is made of Acrylonitrile butadiene styrene and its cover made of Polycarbonate .


The Autonics fiber optic sensor BF3RX features cable type. This cable covers the sensor's 4 wires. It is 5 mm in diameter and 2 meters in length.


There are limitations in temperature and humidity in which BF3RX fiber optic sensor is used:

  • Storage temperature: -25 … 70°C
  • Storage humidity: 35 to 85%RH
  • Ambient temperature: -10 … 50°C
  • Ambient humidity: 35 to 85%RH

Environment resistance is rated at no freezing or condensation.


Want to know how this sensor acts? Check our article to get the full report on Fiber Optic sensor working principles.

Series Information

BF3 Series

Dual Adjustment Fiber Optic Amplifiers

The Autonics BF3 series fiber optic amplifiers come equipped with dual adjusters (COARSE, FINE) for precise sensitivity adjustment. The units feature high-speed response time under 1 ms, and users can conveniently switch between Light ON and Dark ON modes using control wires. The amplifiers can be easily mounted on DIN rails and is compatible with various fiber optic cables from Autonics.

BF3 Series Main features

  • Simple DIN rail mount installation
  • High-speed response under 1ms
  • Precise sensitivity adjustment with dual adjusters (COARSE, FINE)
  • Switch between Light ON and Dark ON modes using control wire
  • Built-in reverse polarity protection circuit, output short-circuit (overcurrent) protection circuit

About Fiber Optic 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 6 Fiber Optic sensors series:

  • Fiber Optic Units: Fiber Optic Units
  • BFX Series: LCD Display Digital Fiber Optic Amplifiers
  • BF5 Series: High Performance Single/Dual Digital Display Fiber Optic Amplifiers
  • BFC Series: Digital Fiber Optic Amplifier Communication Converters
  • BF4 Series: Digital Display Fiber Optic Amplifiers
  • BF3 Series: Dual Adjustment Fiber Optic Amplifiers

Autonics products are mainly used in:

  • Automotive
  • Semiconductor/Display Industry
  • Packaging Industry
  • Machine Tools Industry


You may want to read this product's catalog. If so, please click to view the BF3RX datasheet.
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Warranty Information

One Year Warranty
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Additional Information

Response frequency:
Max. 0.5ms (frequency 1). Max 0.7ms (frequency 2).
Power supply.:
12-24VDC ±10% (Ripple P-P: Max 10%).
Current consumption:
Max. 45mA.
Light source:
Red LED (Modulated).
Sensitivity Adjustment:
Sensitivity Adjustment button (ON/OFF).
Operation mode:
Automatic selection of Light ON/Dark ON accordance with button setting.
Control output:
NPN/PNP open collector output. Load voltage max. 30VDC. Load current max. 100mA. Residual voltage –NPN: Max. 1V (load current 100mA), Max 0.4V (load current 16mA)/PNP: Max 2.5V.
Self-diagnosis output:
On state under unstable setting (when the target stays for 300ms in the unstable area) On state when control output short-circuited.
Self-diagnosis output:
Load voltage max. 30VDC. Load current max. 50mA. Residual voltage –NPN: Max. 1V (load current 50mA), Max 0.4V (load current 16mA)/PNP: Max 2.5V.
Input of stop transmission function:
External synchronization function:
Remote sensitivity setting function:
Protection circuit:
Reverse polarity protection, output short-circuit (over-current) protection circuit.
Interference prevention function:
Built-in differential frequency mode (set by frequency 1 or 2 by on/off button).
Operation indicator: Red LED. Stability indicator: Green LED ON when the target stays in stable sensing level.
Timer function (Selectable):
Built-in OFF delay timer, Approx 40ms fixed.
Insulation resistance:
Min 20MΩ (500VDC mega).
Noise strength:
The square wave noise by noise simulator (Voltage ±240V. period 10ms. Pulse width 1µs).
Dielectric strength:
1000VAC 50/60 Hz for 1 min.
1.5mm amplitude at a frequency of 10~55Hz in each of X, Y, Z directions for 2 hours.
500m/s2 (50G) in X, Y, Z directions for 3 times.
Ambient illumination:
Sunlight: max. 11,000Ꙇx.Incandescent lamp: max. 3000Ꙇx.
Ambient temperature:
-10~+50◦C (at non-freezing status).
Storage temperature:
Ambient humidity:
35~85 RH.
Storage humidity:
35~85 RH.
Case: heat resistant ABS. Cover PC.
Ø4 4-wire, Length: 2M. (AWG22, core diameter: 0.08mm. no. of cores: 60. Insulator out diameter: Ø1.25mm).
Unit weight:
Approx. 65g.
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