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BOS 18Kx-xx- SERIES  

INSTRUCTION MANUAL 

 

CONTROLS 

OUTPUT LED (BOS 18K…PD/PE/XA/QC/QD/RE/TB/FR/1N1R, BLE 
18K..) 

The yellow LED ON indicates that the NO output status is closed. 

STABILITY LED (BOS 18K...PD/PE/QC/QD/FR, BLE 18K...PP) 

The green LED ON indicates that the received signal has a reserve 
greater than 30% compared to the output switching value. 

POWER ON LED (BLS 18K...1P) 

The green LED indicates that the sensor is operating. 

POTENTIOMETER (BOS 18K...QD/PD/PE/TB/FR, BLE 18K...PP) 

The potentiometer can be used to adjust sensitivity; the operating 
distance increases turning the potentiometer clockwise. 
 

WARNING:  The potentiometer rotation is limited to 270° by a 
mechanical stop. 
Do not apply excessive torque when adjusting (max 40 Nmm).

 

INSTALLATION 

The sensor can be fixed by means of the M18x1 threaded body through a 

 18mm 

hole, using the specific washer and the two CH.24 nuts enclosed (1.5Nm maximum 
tightening torque). 
Alternatively, the sensor can be mounted 
through the two housing’s holes using two 
screws (M3x22 or longer) and washer. 
Amongst the various possible solutions, we 
suggest to choose the combination that offers 
the best visibility of the signalling LEDs and the 
easiest access to the potentiometer. 
Wide range of accessories available: 22mm 
nuts, h=8mm, (2Nm maximum tightening 
torque) guarantee an improved torque and 
various orientable fixing brackets ease the 
sensor positioning (please refer to the 
accessories listed in the general catalogue). 
The operating distance is measured from the front surface of the sensor lens. 

 

Only diffuse type: To improve the detection, the object has to be moved closer or further 
away from the front surface of the sensor lens. 
In case of lateral translation, the object must move as indicated in the figure. 

CONNECTIONS 

The connections are complaint to the EN 60947-5-2.

 

 

BOS/BLS 

+

10 … 30 Vdc 

NC OUTPUT 

BROWN 

WHITE 

BLACK 

BLUE 

NO OUTPUT 

0 V 

 

BLE 

+

10 … 30 Vdc 

TEST + 

BROWN

1

WHITE

2

BLACK

4

BLUE

3

TEST - 

0 V 

 

M12 CONNERCTOR 

2

3

1

4

 

 

 

 

DIMENSIONS 

24

N°.2 Ø3.8

4

=

2.5

=

4

=

3.

8

2

STABILITY LED

10

15

M18

x

1

1.5

14

3.5

24

3.5

1.5

4

4

2

=

3.

8

14

12

10

14.5

N°.2 Ø3.8

TRIMMER

15

mm

14

=

M1

8x1

Ø4

25

25

RADIAL VERSION

TRIMMER

OUTPUT LED

STABILITY LED

OUTPUT LED

OUTPUT LED

STABILITY LED

without trimmer

L
X

X1

M O D E L S

with trimmer

X1

X

AXIAL VERSION

L
X

X1

X

X1

CABLE VERSION

=

M12

=

M1

2

14.5

L

14.5

L

79
43
46

69
42
36

57
42
24

67
43
34

10

without trimmer

M O D E L S

with trimmer

 

 
 

TECHNICAL DATA 

 

BOS 18KF (Axial version) 

BOS 18KW (Radial version)

 

Power supply: 

10 … 30 Vdc 

Ripple: 

2 Vpp max. 

Current consumption  
(output current excluded): 

35 mA max. 

Outputs: 

NO and NC; PNP or NPN 

Output current: 

100 mA max.  

Output saturation voltage: 

2 V max. 

Response time: 

0.5 ms (2 ms BLE/BLS) 

Switching frequency: 

1KHz (250 Hz BLE/BLS) 

Indicators: 

output-LED (yellow) ( BLS) 

stability-LED (green) (BOS 18K...QC/QD and BLE) 

POWER ON LED (green) (BLS) 

Setting: 

sensitivity potentiometer (BOS 18K...PD/PE/QC/QD/TB, BLE 18K...) 

Operating temperature: 

-25 … 55 °C 

Operating distance (typical values): 

BOS 18KF-...RE: 0.1…5m on R1 

BOS 18KF-...QD: 0.1…4.5m on R1 

BOS 18KF-...PE: 0…70cm 
BOS 18KF-...XA: 0…10cm 
BOS 18KF-...PD: 0…40cm 

BOS 18KF-...1N1R: 0,5…10cm 

BLE/BLS 18KF-...: 0…20m 

BOS 18KF-...FR: depends on fiber 
BOS 18KF-...TB: 0.1…1,7m on R1 

 

BOS 18KW-...QC: 0.1…3m on R1 

BOS 18KW-...PD: 0…40cm 

BOS 18KW-...XA: 0…8cm 

 

BOS 18KW-...1N1R: 0…8cm 

BLE/BLS 18KW-...: 0…15m 

 

BOS 18KW-...TB: 0.1…1,7m on R1 

Emission type: 

red (660nm) (BOS 18..QC/QD/TB/FR/1N1R) / infrared (880nm) (BOS 18..RE/PD/PE/XA; BLS18..1P) 

Ambient light rejection: 

according to EN 60947-5-2 

Housing material: 

PBT  

Mechanical protection: 

IP67 

Connections: 

2 m cable 

 4 mm / M12 - 4 pole connector 

Weight: 

75 g. max. cable vers. / 25 g. max. connector vers.  

 
 

SETTING 

Setting of BOS 18K...RE 

Position the sensor and reflector on opposite sides. 
Find the points where the yellow LED (OUT) is switched ON and OFF in 
both vertical and horizontal positions and fix the sensor in the centre 
between these points. 

Setting of BOS 18K...QC/QD/TB 

Position the sensor and reflector on opposite sides. 
Turn the sensitivity potentiometer to the maximum position. 
Moving the sensor both vertically and horizontally, determine the power 
on and off points of the yellow LED (OUT) and then mount the sensor in 
the middle of the points defined. Optimum operation is obtained when 
the green LED (only BOS 18K...QC/QD) is ON and the yellow LED is 
OFF. 

QC/QD

 If necessary reduce sensitivity in order to detect 

very small targets. In order to improve alignment, repeat 
the procedure detailed above whilst progressively 
reducing the sensitivity. 

TB

 Turn the sensitivity trimmer counterclockwise until the yellow LED 

turns ON (pos.A). Turn slowly the trimmer again clockwise until the 
yellow LED turns OFF (Operating condition, pos.B). 
 

Setting of BLE/BLS 18K.../BOS 18…FR (with P/R fibre optics) 

Position the sensors on opposite sides. 
Turn the sensitivity potentiometer to maximum: moving the sensor both 
vertically and horizontally, determine the power on and off points of the 
yellow LED (OUT) and then mount the sensor in the middle of the points 
defined. Optimum operation is obtained when the green LED is ON and 
the yellow LED is OFF.  
 
If necessary, reduce sensitivity using the potentiometer, in order to 
detect very small targets. In order to improve alignment, repeat the 
procedure detailed above whilst progressively reducing the sensitivity. 

 

Setting of BOS 18K...PD/PE/FR with proximity fibre 

Turn the sensitivity potentiometer to minimum: the green LED is ON, the 
yellow LED is OFF. Position the target to detect in front of the sensor or 
of the fibre terminals. Turn the sensitivity potentiometer clockwise until 
the yellow LED turns ON 

(Target detected state, pos.A). 

Remove the target, the yellow LED turns OFF. 
Turn the sensitivity potentiometer clockwise until the yellow LED turns 
ON 

(Background detected state, pos.B). 

The potentiometer reaches maximum if the background is not detected. 
Turn the potentiometer to the intermediate position C, between the two 
positions A and B. The green LED must be ON. 

Setting of BOS 18K...XA/1N1R 

The operating distance range of these sensors is fix. Please consider 
this feature when positioning. 
 
 

TEST FUNCTION (BLS) 

The TEST+ and TEST- inputs can be used to inhibit the emitter and 
verify that the system is correctly operating. 
The receiver output should switch when the test is activated while the 
beam is uninterrupted. 
The inputs activating voltage range is 10 … 30 Vdc. 

 

 
 
 
 
Balluff GmbH 
Schurwaldstra

e 9 

73765 Neuhausen a.d.F. Deutschland 
Tel.: +49 (0) 71 58/1 73-0 
Fax  +49 (0) 71 58/50 10 
E-Mail: [email protected] 

www.balluff.com 

 
 
Nr./No. 826 220 D/E 
Ausgabe/Edition 1108;  
Änderungen vorbehalten/Subject to modification 
Ersetzt Ausgabe/Replaces edition 0412

 

 

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