SICK WTB4 Photoelectric Sensor

SICK WTB4 Photoelectric Sensor

Compact & Precise Object Detection for Industrial Automation

The SICK WTB4 Photoelectric Sensor is a compact industrial sensor designed for reliable, non-contact object detection in automation and machine applications. The WTB4 family includes photoelectric proximity sensors with different sensing ranges, light sources, outputs and connection options, depending on the exact model.

Its compact size makes it suitable for machines where installation space is limited, while selected WTB4 variants are specifically designed for applications such as detecting small objects.

Key Features

Genuine SICK WTB4 Photoelectric Sensor

Compact and space-saving design

Non-contact object detection

Photoelectric proximity sensing

Background suppression on applicable variants

PinPoint LED available on selected models

Visible red light or infrared light depending on variant

Potentiometer adjustment on applicable models

PNP/NPN output options depending on model

M8 and other connection configurations available

Suitable for detecting small objects on selected variants

Designed for industrial automation and machine applications

Where Is SICK WTB4 Used?

The WTB4 Photoelectric Sensor can be used for:

Conveyor object detection

Packaging machines

Small-part detection

Assembly machines

Production lines

Material handling

Object presence detection

Object counting

Position detection

Label and packaging applications

Automated machine control

Industrial automation

SICK also documents WTB4 applications for packaging processes and conveyor detection, including applications involving glossy and small products.

Why Choose SICK WTB4?

When machinery has limited installation space, a compact sensor can make integration easier. The SICK WTB4 family provides different configurations so the sensor can be matched to the actual application.

Selected models use background suppression, which helps detect an object while distinguishing it from the background. Some variants use PinPoint LED technology and are specifically listed by SICK for detecting small objects.

Compact Design

The WTB4 is designed for applications where a sensor needs to fit into a relatively small machine or installation area.

Small Object Detection

Certain WTB4 models are specifically specified for detecting small objects, making them useful for compact products and automated production processes.

Multiple Configurations

The W4/WTB4 family is available with different sensing ranges, light sources, outputs and connection types. This gives machine builders flexibility when selecting the appropriate sensor.

Technical Details

Because WTB4 represents a family of sensors, exact specifications depend on the complete SICK part number.

Specification SICK WTB4

Brand SICK

Series W4 / WTB4

Category Photoelectric Sensor

Sensor Type Photoelectric Proximity Sensor

Detection Non-contact

Sensing Principle Background suppression on applicable models

Light Source PinPoint LED / LED

Light Visible red / infrared, model dependent

Adjustment Potentiometer / model dependent

Sensing Range Model dependent

Output PNP / NPN, model dependent

Connection Model dependent

Application Industrial automation

For example, the WTB4-3P2161 has a specified sensing range of 15–150 mm, maximum sensing range of 4–150 mm, visible red light from a PinPoint LED and a 5-turn potentiometer adjustment.

Another WTB4 variant, WTB4-3P3161, is specified with a 15–150 mm sensing range, 10–30 V DC supply and PinPoint LED with visible red light.

Important: These specifications should not be applied to every WTB4 model. Always verify the complete part number before ordering.