DSPSL-500DP / DSPSL-500DN Laser Photoelectric Sensor- Denki Seigyo
The Denki Seigyo DSPSL-500DP / DSPSL-500DN Laser Photoelectric Sensor is a compact, high-precision laser diffuse sensor designed for accurate object detection in demanding industrial automation applications. Equipped with advanced background suppression technology, it reliably detects targets while minimizing interference from surrounding surfaces and background objects. Featuring a visible red Class 1 laser, adjustable sensing distance up to 500 mm, fast response time, and PNP/NPN output options, the DSPSL Series is ideal for electronics assembly, packaging machinery, robotics, semiconductor equipment, position verification, and small component detection where precision and reliability are critical.
More details, please check the Datasheet Link. Dspsl series photo sensor
DSPSL-500DP / DSPSL-500DN Laser Photoelectric Sensor- Denki Seigyo
Laser Diffuse Sensor with Background Suppression for Precision Object Detection
Utilizing a visible red Class 1 laser and advanced optical triangulation technology, the DSPSL Series delivers accurate detection while suppressing unwanted background reflections. Its fine laser spot enables precise sensing in high-speed automation and limited-space installations.
Key Features
✔ Laser diffuse sensing with background suppression
✔ Detection range up to 500 mm
✔ Visible red Class 1 laser source
✔ Adjustable sensing distance
✔ High-precision small object detection
✔ Light ON / Dark ON selectable
✔ PNP and NPN output options
✔ Fast response time ≤ 0.5 ms
✔ Compact rectangular housing
✔ Built-in power and output indicators
✔ Excellent immunity to object color variation
✔ IP67 industrial protection rating
Product Overview
The DSPSL Series is engineered for industrial applications requiring:
- Precision object detection
- Small component sensing
- Stable background suppression
- High-speed automation
- Accurate positioning
The advanced laser sensing system ensures reliable detection even in applications involving shiny, dark, or color-varying targets.
Available Models
| Model | Output Type | Sensing Distance | Light Source |
|---|---|---|---|
| DSPSL-500DP | PNP | 1–500 mm Adjustable | Red Laser |
| DSPSL-500DN | NPN | 1–500 mm Adjustable | Red Laser |
Model Structure
Example: DSPSL-500DP
| Code | Description |
|---|---|
| DS | Denki Seigyo |
| PSL | Photo Sensor Laser |
| 500 | 500 mm Sensing Distance |
| D | DC Supply |
| P | PNP Output |
| N | NPN Output |
How Background Suppression Works
Unlike standard diffuse sensors, the DSPSL Series uses optical triangulation technology to distinguish targets from backgrounds.
Benefits
- Reliable object detection
- Reduced false triggering
- Improved accuracy
- Stable performance on reflective surfaces
- Less influence from target color variations
This makes the sensor ideal for demanding industrial automation applications.
Technical Specifications
Optical Specifications
| Parameter | Specification |
|---|---|
| Detection Method | Laser Diffuse with Background Suppression |
| Light Source | Visible Red Laser |
| Laser Class | Class 1 |
| Wavelength | 650–680 nm |
| Spot Diameter | Approx. Ø0.5 mm @ 150 mm |
| Sensing Distance | 1–500 mm Adjustable |
| Recommended Range | 5–500 mm |
| Smallest Detectable Object | Approx. Ø0.4 mm |
Electrical Specifications
| Parameter | Specification |
|---|---|
| Supply Voltage | 10–30 VDC |
| Current Consumption | ≤ 25 mA |
| Output Type | PNP / NPN |
| Output Current | ≤ 100 mA |
| Switching Function | Light ON / Dark ON Selectable |
| Response Time | ≤ 0.5 ms |
| Switching Frequency | 1000 Hz |
| Protection Circuit | Reverse Polarity / Short Circuit / Overcurrent |
The fast switching frequency makes the DSPSL Series suitable for high-speed production lines.
Environmental Specifications
| Parameter | Specification |
|---|---|
| Protection Rating | IP67 |
| Operating Temperature | -20°C to +50°C |
| Storage Temperature | -40°C to +70°C |
| Humidity | 35–95% RH |
| Vibration Resistance | 10–55 Hz |
| Shock Resistance | 30 G |
| Ambient Light Immunity | ≥ 10,000 Lux |
Designed for reliable operation in harsh industrial environments.
Mechanical Specifications
| Parameter | Specification |
|---|---|
| Housing Type | Rectangular |
| Housing Material | ABS Engineering Plastic |
| Lens Material | PMMA |
| Cable Type | 3-Wire PVC Cable |
| Cable Length | 2 m Standard |
| Dimensions | Approx. 12 × 32 × 22 mm |
| Weight | Approx. 60 g |
Indicators & Adjustment
LED Indicators
| Indicator | Function |
|---|---|
| Green LED | Power ON |
| Yellow LED | Output Status |
Adjustment Functions
| Control | Function |
|---|---|
| Potentiometer | Sensing Distance Adjustment |
| Mode Switch | Light ON / Dark ON Selection |
Wiring Diagram
DSPSL-500DP (PNP Output)
| Wire Colour | Function |
|---|---|
| Brown | +10–30VDC |
| Blue | 0V |
| Black | Output |
DSPSL-500DN (NPN Output)
| Wire Colour | Function |
|---|---|
| Brown | +10–30VDC |
| Blue | 0V |
| Black | Output |
Applications
The DSPSL Series is ideal for:
✔ Semiconductor manufacturing
✔ Electronics assembly
✔ PCB inspection systems
✔ Packaging machinery
✔ Pharmaceutical equipment
✔ Robotics and automation
✔ Small component detection
✔ Position verification
✔ High-speed counting systems
✔ Label and mark detection
Why Choose Denki Seigyo DSPSL Series?
✔ Precision laser sensing technology
✔ Reliable background suppression
✔ Small object detection capability
✔ Compact installation footprint
✔ Fast response for automation systems
✔ Excellent resistance to color variation
✔ Industrial-grade durability
Ordering Information
| Model | Output | Supply Voltage | Sensing Distance | Connection |
|---|---|---|---|---|
| DSPSL-500DP | PNP | 10–30VDC | 1–500 mm | 2 m Cable |
| DSPSL-500DN | NPN | 10–30VDC | 1–500 mm | 2 m Cable |
What is the sensing distance of DSPSL-500DP?
The sensor offers an adjustable sensing distance from 1 mm to 500 mm.
What is the difference between DSPSL-500DP and DSPSL-500DN?
- DSPSL-500DP → PNP output
- DSPSL-500DN → NPN output
Does the sensor support background suppression?
Yes. Advanced background suppression technology minimizes false detection caused by unwanted backgrounds.
What type of laser is used?
The DSPSL Series uses a Class 1 visible red laser (650–680 nm).
What industries use the DSPSL Series?
The sensor is commonly used in electronics, semiconductor manufacturing, robotics, packaging machinery, and precision automation.
Product Summary
The Denki Seigyo DSPSL-500DP / DSPSL-500DN Laser Photoelectric Sensor combines precision laser detection, advanced background suppression, and high-speed performance in a compact industrial design. With adjustable sensing distance up to 500 mm, PNP/NPN output options, and IP67 protection, it is an ideal solution for demanding industrial automation and precision sensing applications.
