DPRA Series – Denki Seigyo Analog Inductive Proximity Sensor
Product Summary
The Denki Seigyo DPRA Series Analog Inductive Proximity Sensors deliver accurate and stable analog distance sensing for industrial automation systems. With compact cylindrical housings, 0–10V voltage output, and rugged IP67 protection, the DPRA series is ideal for positioning, displacement monitoring, and process control applications.
More details, please check the Datasheet LinkDPRA- series proximity sensor
DPRA Series - Denki Seigyo Analog Inductive Proximity Sensor
The Denki Seigyo DPRA Series Analog Inductive Proximity Sensors are precision non-contact sensors designed to provide continuous analog voltage output proportional to the distance of metallic targets.
The DPRA series supports stable analog sensing for industrial automation, positioning systems, thickness measurement, and process control applications.
With compact cylindrical threaded housings, high linear accuracy, and rugged IP67 protection, these sensors ensure reliable performance in demanding industrial environments.
Key Features
✔ Analog voltage output (0–10V DC)
✔ Continuous distance measurement
✔ High linear accuracy (< 5%)
✔ Fully potted IP67 construction
✔ Compact cylindrical threaded housing
✔ Reverse polarity protection
✔ Short-circuit protection
✔ Stable sensing performance
✔ High vibration resistance
✔ Flush mounting design
Product Overview
The Denki Seigyo DPRA Series is engineered for industrial applications requiring:
- Precise analog distance sensing
- Stable voltage signal output
- Continuous position monitoring
- Reliable industrial automation performance
These sensors are ideal for real-time displacement and positioning applications.
Available Models
| Model | Size | Sensing Distance | Output Type |
|---|---|---|---|
| DPRA12-03V2M | M12 | 3 mm | Voltage |
| DPRA12-04V2M | M12 | 4 mm | Voltage |
| DPRA18-04V2M | M18 | 4 mm | Voltage |
| DPRA18-07V2M | M18 | 7 mm | Voltage |
Model Structure
Example: DPRA18-07V2M
| Code | Description |
|---|---|
| D | Denki Seigyo |
| PRA | Round Analog Proximity Sensor |
| 18 | M18 diameter |
| 07 | 7 mm sensing distance |
| V | Voltage output |
| 2M | 2 meter cable |
Technical Specifications
General Specifications
| Parameter | Specification |
|---|---|
| Sensor Type | Analog inductive proximity sensor |
| Installation | Flush |
| Output Type | Analog voltage |
| Detection Object | Ferrous metal |
Electrical Specifications
| Parameter | Specification |
|---|---|
| Supply Voltage | 10 – 30V DC |
| No-load Current | < 35 mA |
| Voltage Output | 0 – 10V DC |
| Load Resistance | > 2 kΩ |
| Voltage Drop | < 2V DC |
| Switching Frequency | 100 Hz |
The stable analog voltage output enables accurate integration with PLCs and industrial control systems.
Sensing Specifications
| Model | Sensing Range |
|---|---|
| DPRA12-03V2M | 0.1 – 3.0 mm |
| DPRA12-04V2M | 0.1 – 4.0 mm |
| DPRA18-04V2M | 1.0 – 4.0 mm |
| DPRA18-07V2M | 1.0 – 7.0 mm |
Accuracy Specifications
| Parameter | Specification |
|---|---|
| Linear Accuracy | < 5% |
| Repeat Accuracy | 0.02 mm |
| Temperature Drift | < 10% |
The DPRA series provides high repeatability for precise positioning and monitoring applications.
Mechanical Specifications
| Parameter | Specification |
|---|---|
| Housing Material | Copper nickel plated brass |
| Sensing Surface | PBT |
| Connection | 2 m cable |
| Cable Diameter | Ø4 mm (M12), Ø5 mm (M18) |
Environmental Specifications
| Parameter | Specification |
|---|---|
| Protection Rating | IP67 |
| Operating Temperature | −25°C to +70°C |
| Vibration Resistance | 55 Hz, 1 mm amplitude |
| Shock Resistance | 30 g / 11 ms |
| EMC Standard | IEC 60947-5-2 |
Designed for reliable operation in industrial environments with vibration and temperature fluctuations.
Correction Factor
| Material | Correction Factor |
|---|---|
| Steel (Fe37) | 1.0 |
| Stainless Steel | Approx. 0.85 |
| Brass | Approx. 0.5 |
| Aluminum | Approx. 0.45 |
| Copper | Approx. 0.4 |
Dimensions
M12 Type
| Parameter | Dimension |
|---|---|
| Thread | M12 × 1 |
| Body Length | 50 mm |
| Hex Size | SW17 |
M18 Type
| Parameter | Dimension |
|---|---|
| Thread | M18 × 1 |
| Body Length | 55 mm |
| Hex Size | SW24 |
Wiring Diagram
Voltage Output Type
| Wire Colour | Function |
|---|---|
| Brown | +12–24V DC |
| Blue | 0V |
| Black | Voltage signal output |
Applications
The Denki Seigyo DPRA Series is suitable for:
• Distance measurement
• Thickness detection
• Position control systems
• Process automation
• Industrial positioning applications
• Metal displacement monitoring
• Machine automation
Why Choose Denki Seigyo DPRA Series?
✔ Precise analog sensing output
✔ Reliable industrial-grade construction
✔ Compact cylindrical threaded design
✔ Stable long-term sensing performance
✔ Easy PLC and controller integration
✔ Excellent repeatability and accuracy
Ordering Information
| Model | Size | Output | Cable |
|---|---|---|---|
| DPRA12-03V2M | M12 | 0–10V | 2 m |
| DPRA12-04V2M | M12 | 0–10V | 2 m |
| DPRA18-04V2M | M18 | 0–10V | 2 m |
| DPRA18-07V2M | M18 | 0–10V | 2 m |
What is the DPRA analog proximity sensor used for?
It is used for distance measurement, positioning systems, thickness detection, and industrial automation applications.
What output type does the DPRA series provide?
The DPRA series provides continuous analog voltage output (0–10V DC).
What sensing distances are available?
Available sensing distances include 3 mm, 4 mm, and 7 mm depending on the model.
Is the DPRA sensor suitable for industrial environments?
Yes, the sensor features IP67 protection and industrial-grade construction.
What materials can the sensor detect?
The DPRA series is designed primarily for detecting ferrous metal targets
