BJR Series

Oil-Resistant/Oil-Proof Photoelectric Sensors

The BJR series oil-resistant/oil-proof photoelectric sensors are optimized for use in various environments with cutting oil and lubricants such as automotive and machine tool industries. The sensors are capable of long distance detection up to 15 m (through-beam type). Various features including MSR (Mirror Surface Rejection) function and mutual interference prevention functions allow stable and error-free operation. The screw mounting hole is made of metallic nuts, allowing easy installation using M3 bolts and offering easy maintenance even when exposed to various oils.

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Description

Features

  • For use in oil environments such as cutting oil or lubricants (optimized for automotive and machine tool industries)
    BJR (oil-resistant type): special coating prevents oil (oil drop/powder) from penetrating into the product
    BJR-F (oil-proof type): operates normally even when oil (oil drop/powder) penetrates into the product
  • Long sensing distance:
    – Through-beam type: 15 m,
    – Diffuse reflective type: 1 m
    – Retroreflective type: 3 m (MS-2S)
  • MSR (Mirror Surface Rejection) function (retroreflective type)
  • Compact size: W 20 x H 32 x L 11 mm
  • Light ON/Dark ON operation mode switch
  • Sensitivity adjuster
  • Built-in reverse polarity protection circuit and output overcurrent (short-circuit) protection circuit
  • Mutual interference prevention function (except through-beam type)
  • Excellent noise immunity and minimal influence from ambient light
  • IP67 protection structure (IEC standard)
    Oil-resistant type (BJR): IP67G oil-proof protection structure (JEM standard)
    Oil-proof type (BJR-F): IP67F oil-resistant protection structure (JEM standard)
For Use in Oil Environments
Long Sensing Distance
Detect Reflective Targets (Retroreflective Type)
Simple Operation Mode Switching
Excellent Noise Immunity
Protection Rating

Optimized for Automotive and Machine Tool Industries

The BJR series oil-resistant/oil-proof photoelectric sensors are optimized for use in various environments with cutting oil and lubricants such as automotive and machine tool industries.

Oil-resistant type: special coating prevents oil (oil drop/powder) from penetrating into the product

Oil-proof type: operates normally even when oil (oil drop/powder) penetrates into the product

BJR Series Oil-Resistance/Oil-Proof Test Results

The product has passed oil resistance tests for IP67G and IP67F protection rating (JEM standard). Oil-resistance may be affected by certain types of oil. Refer to the following table when considering oil types.

Oil Type Product Name Kinematic Viscosity
(mm²/s, 40˚C)		 pH
Lubricant Velocite Oil No.3 2 –
Water-insoluble
cutting oil		 Tectyl Cut 527 27 –
Water-soluble
cutting oil		 Tectyl Cool 263C – 9.5 (10% solution)

*The sensor was dipped in the above oils for 240 hours for testing.
– IP67G oil-resistant protection structure (BJR) : special coating prevents oil from penetrating into the product
– IP67F oil-proof protection structure (BJR-F): operates normally even when oil (oil drop/powder) penetrates into the product

 

Various Connection Types Available

The BJR series is available in connector type, cable type, and cable connector types, allowing easy application in various user environments.

Oil-resistant type models are available in cable type and cable connector types only.

Long Sensing Distance Up to 15 m

Through-beam type models feature long sensing distances up to 15 m.

*Sensing distance: retroreflective type 3 m / diffuse reflective type: 1 m

M.S.R (Mirror Surface Rejection) Function (Retroreflective Type)

The retroreflective type models feature MSR (Mirror Surface Rejection) function which allow the units to only receive light from specific mirrors (MS-2S). This function allows stable detection of highly reflective targets including metals, mirrors, etc.

The Working Principle of Mirror Surface Rejection (MSR) Function

The light passed through the polarizing filter on the emitter will become horizontal. The light reflected on the retroreflective mirror will turn 90˚ and the vertical light will be received by receiver through vertical polarizing filter.

Phase control
The light reflected from reflective targets will remain horizontal, and thus will not be received by the receiver with the vertical polarizing filter.
Phase control

Mutual Interference Prevention Function (Except Through-Beam Types)

The emitter cycles can be configured so that the sensors will not be affected by other nearby sensors. This allows adjacent installation of multiple sensors.

Excellent Noise Immunity and Minimal Influence from Ambient Light

The sensors feature noise reduction algorithm and digital filters, offering excellent noise immunity and minimal influence from ambient light.

E.S.D, Sunlight(11,000 lx), SURGE/E.F.T, Light Bulb(3,000 lx)

IP67 Protection Structure (IEC Standard), IP67G/IP67F Protection Structure (JEM Standard)

IP67 protection structure allows stable and error-free operation even in wet or dusty environments.
IP67G/IP67F protection structure allows stable and error-free operation even in oily environments.

IP67

Applications

  • CNC Hole Tapping

    BJR series oil-proof/oil-resistant photoelectric sensors used in CNC hole drilling process.

Other Model