Product Details

1) Series Meaning

GTB10

Diffuse reflection sensor
Object detection using reflected light from the object itself.

Use case:

• General part detection

• Box presence

• Object on conveyor

Detection range:
Typically up to 400–1000 mm depending on model.

GTE10

Diffuse sensor with background suppression (BGS)

More precise version of GTB.
Ignores background objects.

Use case:

• Detect small objects in front of metal wall

• Stable detection regardless of object color

More accurate than standard diffuse.

GL10

Retro-reflective sensor

Requires reflector.
Sensor emits light → reflector returns it → object blocks beam.

Use case:

• Transparent bottle detection

• Long-range object detection

• Conveyor interruption detection

Detection range:
Up to several meters (depending on reflector).

GTB6

Compact diffuse sensor (smaller housing)

Used when:

• Installation space is limited

• Small automation modules

• Compact machines

2) Output Code Explanation

The long model codes such as:

GTB6-N1211
GTB6-P1212
GTB6-N4211
GTB6-P4212
GTB6-N4111
GTB6-P1111
GTB6-P4112
GTB6-P4221

follow SICK internal coding logic.

Below is general decoding structure.

3) N vs P (Output Type)

N = NPN output

Switches to 0V when active.

Used commonly in:

• Asian PLC systems

• Some transistor input modules

P = PNP output

Switches to +24V when active.

Most common in:

• European PLC systems

• Standard industrial automation

Industrial standard today:
PNP is more common globally.

4) 1211 / 1212 / 4211 / 4212 Meaning

The four-digit code typically indicates:

Digit 1 – Electrical type
Digit 2 – Connection type
Digit 3 – Output logic
Digit 4 – Special options

Exact breakdown depends on series, but generally:

Connection Type

Example:

• N1211 → Cable output

• N4211 → M8 connector version

11 vs 12 (Switching Logic)

Often indicates:

• 11 = Light-on

• 12 = Dark-on

Light-on

Output ON when light is received.

Dark-on

Output ON when beam is blocked.

5) Example Breakdown

GTB6-N1211

GTB6 = Diffuse compact sensor
N = NPN
1 = Cable
2 = Light/Dark configuration
11 = Light-on output

Typical:
NPN, cable, light-on

GTB6-P1212

GTB6 = Diffuse compact
P = PNP
Cable type
12 = Dark-on

PNP, cable, dark-on

GTB6-N4211

GTB6
NPN
M8 connector
Light-on

GTB6-P4212

PNP
M8 connector
Dark-on

P1111 / P4112 / P4221

Following same logic:

First digit:
1 = cable
4 = connector

Last digits:
11 = light-on
12 = dark-on

6) Electrical Specifications (Typical GTB6 / G10)

Operating voltage:
10–30 VDC

Output:
PNP or NPN transistor

Max load current:
100 mA typical

Response time:
< 1 ms

Protection class:
IP67

Temperature:
-25°C to +55°C

7) Application Selection Guide

Choose GTB10 when:

• General detection

• Medium distance

• No strict background control needed

Choose GTE10 when:

• Background is reflective

• Object color varies

• Need stable detection

Choose GL10 when:

• Long distance

• Need beam interruption detection

• Transparent object detection (with proper reflector)

Choose GTB6 when:

• Small space

• Compact machine

• Short detection distance

8) Industrial Integration

Typical wiring (PNP example):

Brown = +24V
Blue = 0V
Black = Signal output

Connected to PLC digital input.