DPS3M-RDP / DPS3M-RDN- Denki Seigyo Retro-Reflective Photoelectric Sensor
Product Summary
The Denki Seigyo DPS3M-RDP / DPS3M-RDN Retro-Reflective Photoelectric Sensor provides reliable object detection with compact design, stable sensing, and industrial-grade durability. With polarized reflector technology, fast response, and selectable operating modes, it is ideal for modern automation and conveyor applications.
More details, please check the Datasheet Link. DPS3M series photo sensor
DPS3M-RDP / DPS3M-RDN- Denki Seigyo Retro-Reflective Photoelectric Sensor
The Denki Seigyo DPS3M-R Series Retro-Reflective Photoelectric Sensors are compact industrial optical sensors designed for reliable object detection using a reflector-based sensing method.
The DPS3M-R series integrates the transmitter and receiver inside a single housing and detects objects through interruption of reflected light from a reflector.
With a visible red LED light source, polarization filter, and stable long-distance sensing, the DPS3M-R series is ideal for conveyors, packaging machinery, robotics, and industrial automation systems.
Key Features
✔ Retro-reflective sensing principle
✔ Polarized reflector sensing technology
✔ Long sensing distance up to 3 meters
✔ Visible red LED light source
✔ PNP and NPN output models available
✔ Light ON / Dark ON selectable
✔ Potentiometer sensitivity adjustment
✔ Reverse polarity protection
✔ Short-circuit protection
✔ IP67 industrial protection
✔ Compact ABS housing design
Available Models
| Model | Output Type | Functional Principle | Sensing Distance |
|---|---|---|---|
| DPS3M-RDP | PNP | Retro-reflective | 3 m |
| DPS3M-RDN | NPN | Retro-reflective | 3 m |
Model Structure
Example: DPS3M-RDP
| Code | Description |
|---|---|
| D | Denki Seigyo |
| PS | Square Photo Sensor |
| 3M | 3 meter sensing distance |
| R | Retro-reflective type |
| D | DC type |
| P | PNP output |
| N | NPN output |
Product Overview
The Denki Seigyo DPS3M-R Series is engineered for industrial automation applications requiring:
- Stable object detection
- Compact installation space
- Long sensing distance
- High immunity against reflective surfaces
The polarized reflector sensing system improves detection reliability in industrial environments.
Technical Specifications
General Specifications
| Parameter | Specification |
|---|---|
| Functional Principle | Retro-reflective photoelectric sensor |
| Sensing Range | 0.05 – 3 m |
| Maximum Range | 4 m |
| Polarization Filter | Yes |
| Light Source | Visible Red LED |
| Wavelength | 650 nm |
| Adjustment | Potentiometer |
Electrical Specifications
| Parameter | Specification |
|---|---|
| Supply Voltage | 10 – 30V DC |
| Ripple | ±10% |
| Current Consumption | ≤ 30 mA |
| Output Current | ≤ 100 mA |
| Response Time | < 0.6 ms |
| Switching Frequency | 1000 Hz |
| Protection | Reverse polarity / Overcurrent / Short circuit |
The fast switching response ensures reliable detection in high-speed automation systems.
Output Specifications
| Model | Output |
|---|---|
| DPS3M-RDP | PNP |
| DPS3M-RDN | NPN |
Switching Modes
- Light ON
- Dark ON
Mechanical Specifications
| Parameter | Specification |
|---|---|
| Housing Type | Rectangular |
| Housing Material | ABS / PC |
| Front Screen | PMMA |
| Connection | 3-wire cable, 2 m |
| Cable Material | PVC |
Compact Dimensions
| Parameter | Specification |
|---|---|
| Width | 12 mm |
| Height | 31.5 mm |
| Depth | 21 mm |
The slim compact housing is ideal for tight machine installation spaces.
Environmental Specifications
| Parameter | Specification |
|---|---|
| Protection Rating | IP67 |
| Operating Temperature | −25°C to +55°C |
| Storage Temperature | −40°C to +70°C |
| Humidity | 35–85% RH |
Designed for reliable operation in dusty and industrial environments.
Indicators & Adjustment
| Indicator | Function |
|---|---|
| Green LED | Power ON |
| Yellow LED | Output status |
Adjustment Functions
- Sensitivity adjustment potentiometer
- Light/Dark operation selector
Connection Diagram
PNP Output (DPS3M-RDP)
| Wire Colour | Function |
|---|---|
| Brown | +V |
| Blue | 0V |
| Black | Output |
NPN Output (DPS3M-RDN)
| Wire Colour | Function |
|---|---|
| Brown | +V |
| Blue | 0V |
| Black | Output |
Characteristic Features
Light Spot Size
| Distance | Spot Size |
|---|---|
| 0.35 m | Ø 8 mm |
| 1.0 m | Ø 25 mm |
| 3.0 m | Ø 80 mm |
| 5.0 m | Ø 130 mm |
Recommended Reflector
| Reflector Model | Type |
|---|---|
| DS-RF250 | Standard reflector |
Applications
Denki Seigyo DPS3M-R Series sensors are suitable for:
• Conveyor object detection
• Packaging machinery
• Industrial automation systems
• Material handling equipment
• Robotics
• Presence detection
• Production line monitoring
Accessories
| Accessory | Description |
|---|---|
| Reflector | Standard reflector included |
| Mounting Bracket | Stainless steel mounting bracket |
| Sensor Cable | 3-wire cable |
Why Choose Denki Seigyo DPS3M-R Series?
✔ Reliable reflector-based detection
✔ Compact and easy installation
✔ Stable sensing with polarization filter
✔ Industrial-grade protection
✔ High-speed response performance
✔ Cost-effective automation solution
Ordering Information
| Model | Output | Distance | Type |
|---|---|---|---|
| DPS3M-RDP | PNP | 3 m | Retro-reflective |
| DPS3M-RDN | NPN | 3 m | Retro-reflective |
What is DPS3M-RDP sensor used for?
It is used for reliable object detection in conveyors, packaging machines, and industrial automation systems.
What is the sensing distance of DPS3M-R series?
The sensor provides sensing distance up to 3 meters.
What output options are available?
The series is available in both PNP and NPN output models.
Does the sensor require a reflector?
Yes, the DPS3M-R series uses a reflector-based retro-reflective sensing principle.
Is the sensor suitable for industrial environments?
Yes, the sensor features IP67 protection and durable industrial housing.
