Laser Sensors

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Laser Sensors for Precise Distance and Position Monitoring

Laser sensors are used where accuracy and stable readings matter: distance measurement, height and gap monitoring, positioning, counting and object detection. They help automate quality inspection and maintain process repeatability, even on fast production lines.

When to Choose a Laser Sensor

High accuracy or reliable detection of small objects is required.
A longer working distance is needed compared with a typical photoelectric sensor.
Position or movement monitoring is required, including height, level, gap or geometry checks.
Challenging surfaces, such as partly transparent, dark or high-contrast targets, need to be detected using an appropriate measurement method.

Key Selection Criteria

Range: operating distance and the required detection zone.
Accuracy and repeatability: especially important for gap and position measurement or quality inspection.
Measurement principle: triangulation for precise measurement over short to medium distances, or time-of-flight for longer distances, depending on the application.
Output and interface: a switching output, an analog signal (0–10 V or 4–20 mA) or a digital interface where needed, compatible with your PLC and I/O modules.
Target and background: color, reflectivity, transparency, surface angle and possible glare.
Mounting and environment: mounting hardware, cable or connector (M8/M12), dust, moisture and the required IP rating.

Related Categories

For short-range object detection, explore optical sensors. For metal targets, see inductive sensors. You can also browse all sensors, sensor accessories, Technical Information or contact us.

Frequently Asked Questions About Laser Sensors

How does a laser sensor differ from a standard photoelectric sensor?

A laser typically produces a smaller light spot and can provide better accuracy or more stable detection at a distance. This is useful for measurement and position monitoring.

Should I choose triangulation or time-of-flight?

Triangulation is often more accurate at short to medium distances. Time-of-flight is suitable for longer distances. The choice depends on the application and required accuracy.

How do I select a sensor for dark, shiny or transparent objects?

It depends on the surface, angle, background and required stability. Describe the target and operating conditions, and we will help you choose a suitable version.

Which PLC signal is better: 0–10 V or 4–20 mA?

It depends on the inputs available on your PLC or I/O modules. A 4–20 mA signal is generally more resistant to interference over long cable runs, while 0–10 V can be simpler to connect.