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SPECIFICATIONS

Type

Thru-beam

Retroreflective

Diffuse 

reflective

Convergent reflective

Narrow-view 

reflective

Diffused 

beam

Spot beam

Long distance 

spot beam

Front sensing

Side sensing

Side sensing

Side sensing

Front sensing

Side sensing

Side sensing

Model no.

*1

 

*1

Model nos. with the suffix -PN are PNP output types. On the label of thru-beam types, the P suffix denotes the emitter,  e.g.. EX-

P; D denotes the receiver, 

e.g. EX-

D. The retroreflective type with the suffix -Y does not include the reflector RF-200.

Light-ON

EX-21A(-PN)

EX-23(-PN)

*2

*2

Light-ON or Dark-ON can be selected via the operation mode switch located on the receiver.

EX-29A(-PN)

EX-22A(-PN)

EX-24A(-PN)

EX-26A(-PN)

EX-28A(-PN)

Dark-ON

EX-21B(-PN)

EX-29B(-PN)

EX-22B(-PN)

EX-24B(-PN)

EX-26B(-PN)

EX-28B(-PN)

Sensing range

1m

2m

30 to 300mm

*3

5 to 

160mm

*4

2 to 25mm

*5

6 to 14mm

*6

45 to 115mm

*7

Sensing object

Min. ø2.6mm 

opaque 

object

*8

Min. ø3mm 
opaque 
object

*9

ø 15mm or more 

opaque or 

translucent 

object

*3

Opaque, 
translucent 
or transpar-
ent object

Min. ø0.1mm 
copper 
wire

*10

Min. 
ø0.1mm 
copper 
wire

*10

Opaque, 

translucent or 

transparent 

object

*11

Hysteresis

15% or less of operation distance

Repeatability (perpen-
dicular to sensing axis)

0.05mm or less

0.5mm or less

0.3mm or 
less

0.1mm or 

less

*10

0.05mm or 

less

*10

0.3mm or less

Supply voltage

12 to 24V DC±10% Ripple P-P 10% or less

Current consumption

Emitter: 10mA or less,

 Receiver: 10mA or less

13mA or less

Output

EX-

A, EX-

B, EX-23

NPN open-collector transistor
• Maximum sink current: 50mA
• Applied voltage: 30V DC or less (between output 

and 0V)

• Residual voltage: 1V or less (at 50mA sink 

current) 0.4V or less (at 16mA sink current)

EX-

A-PN, EX-

B-PN, EX-23-PN

PNP open-collector transistor
• Maximum source current: 50mA
• Applied voltage: 30V DC or less (between 

output and +V)

• Residual voltage: 1V or less (at 50mA source 

current) 0.4V or less (at 16mA source current)

Short-circuit 
protection

Incorporated

Response time

0.5ms or less

Operation indicator

Orange LED, lights up when the output is ON. Thru-beam type sensor: located on the receiver.

Stability indicator

Green LED lights up under stable light received condition or stable dark condition. Thru-beam type sensor: located on the 

receiver.

Sensitivity adjuster

Continuously 
variable 
adjuster

Continuously variable adjuster

Continuously variable adjuster

Degree of protection

IP67 (IEC)

Ambient temperature

-25 to +55°C (No dew condensation or icing allowed), Storage: -30 to +70°C

Ambient humidity

35 to 85% RH, Storage: 35 to 85% RH

Emitting element

Red LED (modulated)

Material

Enclosure: Polyethylene terephthalate, Lens: Polyalylate

Cable

0.1mm

2

 3-core (thru-beam type sensor emitter: 2-core) cabtyre cable, 2m long

Weight

Emitter, receiver: approx. 20g  

each

Approx. 20g

Accessories

Adjusting 
screwdriver: 1 
pc.

• RF-200 

reflector: 1 pc. 

• Adjusting 

screwdriver: 1 
pc.

Adjusting 
screwdriver: 
1 pc

Adjusting screwdriver: 1 pc.

Rugghölzli 2

CH - 5453 Busslingen

Tel. +41 (0)56 222 38 18

Fax +41 (0)56 222 10 12

[email protected]

www.sentronic.com

Produkte, Support und Service

SENTRONIC

AG

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