KD25-200 Series 400 mm Laser Displacement Sensor with NPN/PNP Switch Output for High-Precision Non-Contact Measurement

The KRONZ KD25-400 Series is a professional CMOS laser displacement sensor designed for long-range, high-precision non-contact measurement in demanding industrial automation environments. Featuring a nominal measuring distance of 400 mm and an effective measuring range of 200–600 mm, the series delivers outstanding stability, repeatability, and installation flexibility for medium and large industrial equipment.

The KD25-400 Series includes four models to satisfy different industrial control requirements:

• KD25-400N – NPN Switch Output
• KD25-400N2 – NPN Dual Output
• KD25-400P – PNP Switch Output
• KD25-400P2 – PNP Dual Output

All models utilize the same optical system and mechanical design while offering different electrical output configurations. Users can select NPN or PNP outputs together with Switch Output or Dual Output to match PLC systems, industrial controllers, and automation equipment.

Unlike conventional long-range laser sensors, the KD25-400 Series provides two measurement performance options across different measuring ranges. This allows users to balance installation distance and measurement precision according to the specific requirements of their application.

With a maximum measuring range of 600 mm, the KD25-400 Series is particularly suitable for robotic automation, automated production lines, material handling systems, large workpiece inspection, intelligent manufacturing, and industrial machinery where extended sensing distance is required.

• Nominal measuring distance of 400 mm
• Effective measuring range from 200 mm to 600 mm
• High-performance CMOS laser displacement technology
• High-precision non-contact measurement
• Available with NPN or PNP output
• Available in Switch Output and Dual Output configurations
• Two measurement performance options for different measuring ranges
• Excellent stability and repeatability
• Fast response for industrial automation
• Rugged industrial metal housing
• IP67 protection rating
• Designed for continuous industrial operation

All four models provide identical optical performance and mechanical dimensions. The only difference is the electrical output configuration, allowing seamless integration into different industrial automation systems.

Applicable Models

• KD25-400N
• KD25-400N2

NPN output models are designed for industrial automation systems requiring NPN transistor outputs. They provide stable switching signals for object detection, positioning, material handling, and production control.

Typical Applications

• Product detection
• Position verification
• Conveyor automation
• Material transfer
• Machine positioning
• Production monitoring

Applicable Models

• KD25-400P
• KD25-400P2

PNP output models provide source-type switching signals for PLCs and industrial controllers utilizing PNP input architecture while maintaining identical sensing performance.

Typical Applications

• Robotic automation
• Automated machinery
• Large equipment
• Intelligent manufacturing
• Industrial inspection
• Smart factory systems

Applicable Models

• KD25-400N
• KD25-400P

Switch Output models provide reliable digital ON/OFF signals for standard automation applications requiring object detection or position confirmation.

Recommended Applications

• Object presence detection
• Position triggering
• Conveyor systems
• Material handling
• Automatic sorting
• Production automation

Applicable Models

• KD25-400N2
• KD25-400P2

Dual Output models combine digital switching output with analog displacement output, enabling continuous measurement and precision positioning in advanced automation systems.

Recommended Applications

• Distance measurement
• Height monitoring
• Position control
• Large workpiece inspection
• Automated quality inspection
• Closed-loop motion control

The KD25-400 Series is engineered for industrial applications where longer sensing distances improve machine design, installation flexibility, and operational safety. With an effective measuring range of 200–600 mm, the sensor can be mounted farther from moving objects while maintaining accurate and stable measurement.

To accommodate different measurement requirements, the series offers two performance specifications, allowing users to optimize repeatability and linearity according to the selected measuring range. This flexibility makes the KD25-400 Series suitable for a broad range of industrial automation, robotic, and inspection applications.

Combined with flexible output configurations, robust construction, and dependable CMOS laser technology, the KD25-400 Series provides a reliable solution for long-range industrial displacement measurement.

The KRONZ KD25-400 Series is engineered for extended-range precision measurement in industrial automation environments where longer installation distances, larger detection areas, and reliable non-contact sensing are required. With an effective measuring range of 200–600 mm, the series offers exceptional installation flexibility while maintaining stable measurement performance and excellent repeatability.

Designed for large automation systems, robotic workstations, material handling equipment, and industrial inspection applications, the KD25-400 Series helps improve production efficiency, measurement accuracy, and equipment reliability.

The extended measuring range allows the sensor to be installed farther from large workpieces and moving machinery, improving installation flexibility while maintaining precise measurement.

Typical Applications

• Large machine positioning
• Heavy equipment monitoring
• Industrial production machinery
• Automated machine loading
• Large component positioning
• Equipment alignment

The KD25-400 Series provides reliable displacement measurement and positioning feedback for industrial robots operating over larger working areas.

Typical Applications

• Robot positioning
• End-of-arm alignment
• Pick-and-place automation
• Robotic assembly
• Motion verification
• Automated handling systems

Long-distance sensing improves the efficiency of automated material handling systems by providing stable object detection without requiring close sensor installation.

Typical Applications

• Conveyor positioning
• Warehouse automation
• AGV guidance
• Pallet detection
• Material transfer
• Automated logistics systems

The KD25-400 Series enables accurate non-contact inspection of medium and large workpieces throughout the manufacturing process.

Typical Applications

• Height measurement
• Thickness inspection
• Flatness verification
• Gap measurement
• Surface positioning
• Dimensional inspection

The sensor supports continuous production by providing stable measurement feedback for large-scale manufacturing equipment.

Typical Applications

• Production line synchronization
• Product positioning
• Equipment monitoring
• Process verification
• Assembly automation
• Manufacturing control

The KD25-400 Series is well suited for Industry 4.0 applications requiring reliable displacement data for automated process control and production optimization.

Typical Applications

• Smart factory systems
• Digital manufacturing
• Industrial IoT equipment
• Intelligent inspection
• Automated monitoring
• Process optimization

The KD25-400 Series is widely used in:

• Industrial Automation
• Robotic Automation
• Heavy Equipment Manufacturing
• Material Handling Systems
• Logistics Automation
• Machine Building
• Precision Engineering
• Industrial Inspection
• Smart Manufacturing
• OEM Equipment Manufacturing

Choose the appropriate model based on your control system and measurement requirements.

• Digital ON/OFF detection is sufficient
• Object presence detection is required
• Position triggering is needed
• PLC digital input applications
• Standard automation equipment

• Continuous displacement measurement is required
• Analog measurement data is needed
• Precision positioning is required
• Height or thickness must be monitored
• Closed-loop control systems are used
• High-precision quality inspection is required

For optimum performance:

• Mount the sensor securely to minimize vibration.
• Select the appropriate measuring range according to your application.
• Keep the laser beam aligned with the target surface.
• Maintain a clean optical window to ensure stable measurement.
• Avoid excessive dust, oil contamination, or strong direct ambient light.
• Use a stable 12–24 VDC power supply for reliable operation.

Following these recommendations helps achieve maximum measurement accuracy and long-term operational stability.

Both models share the same optical system and measuring range. The KD25-400N provides an NPN Switch Output for digital detection, while the KD25-400N2 adds an analog output for continuous displacement measurement.

The KD25-400P is equipped with a PNP Switch Output for standard digital control applications. The KD25-400P2 combines a PNP switching output with an analog output, making it suitable for precision measurement and process monitoring.

The KD25-400 Series supports two performance specifications to accommodate different measuring ranges. Within 200–400 mm, the sensor provides 400 μm repeatability and ±0.2% F.S. linearity. Within 400–600 mm, it provides 800 μm repeatability and ±0.3% F.S. linearity, allowing users to select the most appropriate performance for their application.

Switch Output models generate a digital ON/OFF signal when the target reaches a preset switching point. Dual Output models combine digital switching with analog displacement output, enabling both object detection and continuous position measurement.

The KD25-400 Series is ideal for robotic automation, large equipment manufacturing, material handling systems, industrial inspection, intelligent manufacturing, warehouse automation, and automated production lines.

A 400 mm nominal measuring distance with an effective measuring range of 200–600 mm provides exceptional installation flexibility for large machines and automated systems. It allows the sensor to be mounted farther from moving objects while maintaining stable, accurate, and reliable non-contact measurement.

Choose the appropriate measuring distance from the KRONZ KD25 Series according to your application requirements.

All KD25 Series models share a common platform while providing optimized measuring distances and output configurations for different industrial applications.

Looking for a reliable 400 mm laser displacement sensor for demanding industrial automation applications?

The KRONZ KD25-400 Series combines extended measuring capability, NPN or PNP output options, and Switch Output or Dual Output configurations to deliver accurate, stable, and reliable non-contact measurement for modern manufacturing systems.

Our engineering team can assist you with:

• Product selection and model recommendations
• Technical application support
• OEM & ODM solutions
• System integration guidance
• Pricing and quotations
• Global sales and after-sales support

Contact KRONZ today to learn how the KD25-400 Series can improve the performance and reliability of your industrial automation system.