Photoelectric limited reflection sensor | 25mm | 21,8x14,5x8,4mm | 10–30VDC | NO | NPN | 2m cable | ABS | red light beam | IP65
Code: PST-SR25DNORThe photoelectric limited reflection sensor is a high-quality solution for object detection at short distances where high precision and stability are required.
The sensor uses a focused red LED beam, allowing it to detect even very small objects.Thanks to limited reflection technology, this model provides extremely stable operation, detecting only objects within a specific range and thus reducing false signals caused by background lighting or nearby surfaces.
Made of durable ABS housing with a PMMA lens, it offers IP65 protection against dust and moisture, making it suitable for use even in demanding environments.-
Technical Specifications
Detection type: Limited reflection
Detection distance: 2…25 mm (non-adjustable)
Blind zone: < 2 mm
Minimum detectable object: 0.1 mm copper wire (at 10 mm distance)
Hysteresis (return difference): < 20%
Light source: Red light (640 nm)
Output type: NPN, NO
Response time: < 1 ms
Power supply voltage: 10…30 V DC
Operating current: ≤ 15 mA
Load current: ≤ 50 mA
Voltage drop: ≤ 1.5 V
Protection: Short-circuit, reverse polarity, overload protection
Indicators: Green LED – power/stability indicator; Yellow LED – output signal
Light interference resistance: Sunlight ≤ 10,000 lux; Lamp light ≤ 3,000 lux
Operating temperature: -20…+55 °C
Storage temperature: -30…+70 °C
Protection rating: IP65
Housing: ABS plastic
Lens: PMMA
Connection: 2 m PVC cable
Package contents: 2 × M3×16 mm screws, 2 nuts, user manual
Testing conditions: 100×100 mm white card used (reflectivity >90%)Functions and Operating Principle
The sensor operates on the principle of focused limited reflection — the light beam is emitted toward an object and returns to the receiver only when the object is within a specific limited range.
It allows precise detection of nearby objects while avoiding false signals from background surfaces.
A fast response time ensures suitability for high-speed production lines, robotics, or small component inspection processes.
Integrated protections guarantee long service life and safe operation.Applications
For home users or hobbyists: Suitable for object detection in workshops or DIY automation projects.
For engineers/automation specialists: Used in high-precision manufacturing systems, robotics, packaging machinery, part position detection, or micromechanical projects where short range and high sensitivity are required.
For electricians/technicians: Easy installation with included screws and nuts. Clear LED indicators help quickly verify sensor status during setup or testing. Standard 10–30V DC supply allows seamless integration into existing control systems.Advantages
Accurate detection
Focused red LED beam – clear and stable operation
Detects objects as small as 0.1 mm
Fast response time
IP65 protection – resistant to dust and moisture
Easy installation with included hardware
LED indicators – clear operational status
Integrated protections
Disadvantages
Limited performance on very dark or shiny surfaces
Illustrative image may have been created using AI. The appearance of the product may differ slightly from the image shown. Please refer to the technical specification.This product is marked with the CE label, which confirms that it complies with all applicable European Union directives and regulations. CE marking is not just a formality – it is an important indicator of quality and safety, ensuring that the product has been properly assessed, tested, and can be safely used throughout the EU market.
CE certification means that the product has been evaluated according to the main criteria:
Safety requirements – ensures that the product does not pose a risk to the user or the environment
Electromagnetic compatibility (EMC) – the device does not interfere with other equipment and is resistant to external disturbances
Environmental standards – complies with current ecological and material usage requirements
Operational reliability – the product is suitable for long-term use according to its intended purposeCE marking allows this product to:
be legally supplied and used in all European Union countries
ensure a high level of quality and safety
be used in residential, commercial, and industrial environmentsThe CE mark is a declaration of the manufacturer’s responsibility, confirming that the product complies with all applicable standards and has been assessed according to EU legislation.
What does this mean for you as a buyer?
Safe use in everyday activities
Reliable performance and reduced risk of failure
Compliance with EU standards and requirements
Suitability for professional solutions
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