Ultra-Compact Laser Diffuse Photoelectric Sensor with Background Suppression (BGS)
The Denki Seigyo DSQ2 Series Miniature Photoelectric Sensors are compact laser diffuse sensors designed for high-precision object detection in space-constrained industrial automation applications. Featuring advanced Background Suppression (BGS) technology, the DSQ2 Series accurately detects objects regardless of background color, surface finish, or reflectivity.
With an ultra-small housing measuring only 7.7 × 27.5 × 13.5 mm, a visible red laser, sensing distance up to 150 mm, fast 0.6 ms response time, and IP67 protection, the DSQ2 Series is ideal for electronics manufacturing, robotics, semiconductor equipment, pharmaceutical machinery, and high-speed packaging lines.
Key Features
- Ultra-miniature housing (7.7 × 27.5 × 13.5 mm)
- Laser diffuse sensing with Background Suppression (BGS)
- Maximum sensing distance up to 150 mm
- Visible red laser for easy alignment
- Stable detection of black, glossy, and colored objects
- PNP and NPN output models
- Light ON / Dark ON selectable
- High-speed response time (<0.6 ms)
- Fine sensitivity adjustment
- Reverse polarity protection
- Short-circuit protection
- Overcurrent protection
- IP67 waterproof construction
- Compact cable exit for easy installation
- Maintenance-free operation
Product Models
| Model | Output | Operating Mode | Sensing Distance |
|---|---|---|---|
| DSQ2-150DP | PNP | Light ON / Dark ON | 10–150 mm |
| DSQ2-150DN | NPN | Light ON / Dark ON | 10–150 mm |
Model Code Explanation
Example: DSQ2-150DP
| Code | Meaning |
|---|---|
| D | Denki Seigyo |
| SQ2 | Miniature Square Photoelectric Sensor |
| 150 | 150 mm Sensing Distance |
| D | DC Supply |
| P | PNP Output |
| N | NPN Output |
Technical Specifications
Optical Specifications
| Parameter | Specification |
|---|---|
| Detection Method | Diffuse Reflection with Background Suppression |
| Light Source | Visible Red Laser |
| Wavelength | 650 nm |
| Sensing Distance | 10–150 mm |
| Adjustable Distance | Yes |
| Light Spot Size | Approx. Ø3 mm @ 50 mm |
Electrical Specifications
| Parameter | Specification |
|---|---|
| Supply Voltage | 10–30 VDC |
| No-load Current | ≤20 mA |
| Output Type | PNP / NPN |
| Maximum Load Current | 50 mA |
| Voltage Drop | ≤2 V |
| Response Time | <0.6 ms |
| Switching Frequency | 800 Hz |
| Operation Mode | Light ON / Dark ON Selectable |
Mechanical Specifications
| Parameter | Specification |
|---|---|
| Housing Material | ABS Engineering Plastic |
| Lens Material | PMMA |
| Dimensions | 7.7 × 27.5 × 13.5 mm |
| Connection | 2 m PVC Cable |
| Cable Diameter | Ø3 mm |
| Weight | Approx. 35 g |
Environmental Specifications
| Parameter | Specification |
|---|---|
| Protection Rating | IP67 |
| Operating Temperature | −25°C to +50°C |
| Storage Temperature | −40°C to +75°C |
| Humidity | 35–95% RH (Non-condensing) |
| EMC | IEC Industrial Standard |
LED Indicators
| LED | Function |
|---|---|
| Green | Power ON |
| Yellow | Output Status |
Wiring
PNP Model – DSQ2-150DP
- Brown – +V
- Blue – 0 V
- Black – Output
- White – Light ON / Dark ON Selection
NPN Model – DSQ2-150DN
- Brown – +V
- Blue – 0 V
- Black – Output
- White – Light ON / Dark ON Selection
Typical Applications
The DSQ2 Series is ideal for:
- Electronics Assembly
- PCB Inspection
- Semiconductor Manufacturing
- Pharmaceutical Packaging
- Packaging Machinery
- High-Speed Conveyor Systems
- Robotics & Pick-and-Place Machines
- Food & Beverage Equipment
- Small Component Detection
- Automated Production Lines
- Precision Assembly Equipment
Advantages
- Extremely compact design for limited installation space
- Reliable background suppression technology
- Stable detection of dark, shiny, or transparent objects
- High-speed response for fast production lines
- Visible laser simplifies installation and alignment
- Long operating life with maintenance-free performance
- Compatible with PLCs and industrial controllers
Why Choose Denki Seigyo DSQ2 Series?
- Precision laser sensing with BGS technology
- Ultra-miniature industrial housing
- Fast 800 Hz switching frequency
- PNP and NPN output options
- IP67 environmental protection
- Excellent resistance to dust, moisture, and vibration
- Reliable operation in high-speed automation applications
Frequently Asked Questions
What is the sensing distance of the DSQ2-150DP and DSQ2-150DN?
Both models provide an adjustable sensing distance from 10 mm to 150 mm using laser diffuse sensing with background suppression.
What is the difference between DSQ2-150DP and DSQ2-150DN?
- DSQ2-150DP – PNP output
- DSQ2-150DN – NPN output
Both support selectable Light ON and Dark ON operation.
What supply voltage is required?
The DSQ2 Series operates on 10–30 VDC, making it compatible with most PLCs and industrial control systems.
Is the sensor suitable for detecting black or shiny objects?
Yes. The built-in Background Suppression (BGS) technology enables reliable detection of black, glossy, and colored objects with minimal influence from background surfaces.
Which industries use the DSQ2 Series?
The DSQ2 Series is widely used in electronics assembly, semiconductor manufacturing, robotics, packaging machinery, pharmaceutical production, PCB inspection, and high-speed automated production lines.
Product Summary
The Denki Seigyo DSQ2-150DP / DSQ2-150DN Miniature Laser Photoelectric Sensor combines Background Suppression (BGS) technology, a 150 mm sensing range, visible red laser, ultra-compact housing, and IP67 protection to deliver fast, accurate, and reliable object detection in demanding industrial automation applications. Its compact size, high-speed performance, and dependable sensing make it an excellent choice for modern manufacturing systems.
