Product Overview
Unlike conventional proximity sensors with plastic sensing faces, the Denki Seigyo DPRM Series features an all-metal construction, making it ideal for environments where sensors are exposed to physical damage, hot metal chips, welding sparks, cutting fluids, and abrasive conditions.
The M30 cylindrical body provides a 10 mm sensing distance, quasi-flush mounting, and flexible connection options including cable, pigtail cable, and M12 connector versions.
Key Features
- Full stainless-steel housing and sensing face
- M30 cylindrical threaded body
- 10 mm sensing distance
- Quasi-flush mounting
- Available in DC and AC operating versions
- Normally Open (NO) and Normally Closed (NC) output options
- Cable, pigtail cable, and M12 connector types
- Reverse polarity protection (DC models)
- Short-circuit protection
- LED output status indicator
- High vibration resistance
- Resistant to welding spatter, oil, and coolant
- Excellent EMI immunity
- IP67 protection rating
- Long service life in harsh industrial environments
Available Models
DC Models
| Model | Output | Connection |
|---|---|---|
| DPRM30-D10NO | NO | Cable |
| DPRM30-D10NC | NC | Cable |
| DPRM30-D10NO-PC | NO | Pigtail Cable |
| DPRM30-D10NC-PC | NC | Pigtail Cable |
| DPRM30-D10NO-C | NO | M12 Connector |
| DPRM30-D10NC-C | NC | M12 Connector |
AC Models
| Model | Output | Connection |
|---|---|---|
| DPRM30-A10NO | NO | Cable |
| DPRM30-A10NC | NC | Cable |
| DPRM30-A10NO-PC | NO | Pigtail Cable |
| DPRM30-A10NC-PC | NC | Pigtail Cable |
| DPRM30-A10NO-C | NO | M12 Connector |
| DPRM30-A10NC-C | NC | M12 Connector |
Model Code Explanation
Example: DPRM30-D10NO-PC
| Code | Description |
|---|---|
| D | Denki Seigyo |
| PR | Round Proximity Sensor |
| M | Full Metal Body |
| 30 | M30 Diameter |
| D / A | DC / AC Supply |
| 10 | 10 mm Sensing Distance |
| NO / NC | Normally Open / Normally Closed |
| PC | Pigtail Cable |
| C | M12 Connector |
| Blank | Cable Type |
Technical Specifications
General Specifications
| Parameter | Specification |
|---|---|
| Sensor Type | Inductive Proximity Sensor |
| Housing | Cylindrical |
| Diameter | M30 |
| Installation | Quasi Flush |
| Rated Sensing Distance | 10 mm |
| Assured Operating Distance | 0–9.7 mm |
| Standard Target | Iron (Fe) |
DC Electrical Specifications
| Parameter | Specification |
|---|---|
| Supply Voltage | 10–30 VDC |
| Output Type | 3-Wire |
| Load Current | 200 mA Max |
| Switching Frequency | 500 Hz |
| Voltage Drop | ≤2 V |
| Leakage Current | ≤0.1 mA |
| Current Consumption | ≤10 mA |
| Output Indicator | Yellow LED |
AC Electrical Specifications
| Parameter | Specification |
|---|---|
| Supply Voltage | 90–250 VAC |
| Output Type | 2-Wire |
| Load Current | 5–300 mA |
| Frequency | 50 / 60 Hz |
| Output Indicator | Yellow LED |
Mechanical Specifications
| Parameter | Specification |
|---|---|
| Housing Material | Stainless Steel |
| Sensing Face | Stainless Steel |
| Thread Size | M30 × 1.5 |
| Cable Length | 2 m Standard |
| Connector | M12 4-Pin |
| Mounting | Quasi Flush |
| Protection Rating | IP67 |
Environmental Specifications
| Parameter | Specification |
|---|---|
| Operating Temperature | -25°C to +70°C |
| Storage Temperature | -40°C to +85°C |
| Humidity | 35–95% RH |
| Protection Degree | IP67 |
Reduction Factors
| Target Material | Correction Factor |
|---|---|
| Iron (Fe) | 1.00 |
| Stainless Steel | 0.65 |
| Aluminum | 0.25 |
| Copper | 0.22 |
Advantages of Full Metal Sensors
Compared with conventional proximity sensors, the DPRM Series offers:
- Superior resistance to mechanical impact
- Protection against welding sparks and hot metal chips
- Excellent resistance to oil and coolant
- Improved durability in abrasive environments
- Extended service life in heavy industrial applications
- Reliable operation under vibration and electrical noise
Typical Applications
The Denki Seigyo DPRM Series is suitable for:
- Machine Automation
- CNC Machine Tools
- Steel Processing Plants
- Welding Equipment
- Automotive Manufacturing
- Conveyor Systems
- Packaging Machinery
- Robotics
- Material Handling Systems
- Assembly Lines
- Position Detection
- Food & Beverage Equipment
Why Choose Denki Seigyo DPRM Series?
- Heavy-duty full metal construction
- Industrial-grade reliability
- AC and DC models available
- Multiple connection options
- High vibration and shock resistance
- IP67 environmental protection
- Excellent performance in harsh environments
- Long operational life with minimal maintenance.
Frequently Asked Questions
What makes the DPRM Series different from standard proximity sensors?
The DPRM Series features a full stainless-steel housing and sensing face, providing superior durability and resistance to impact, welding spatter, oil, and coolant.
What sensing distance does the DPRM30 Series offer?
The DPRM30 Series provides a 10 mm rated sensing distance with an assured operating distance of 0–9.7 mm.
Are both AC and DC versions available?
Yes. The series is available in 10–30 VDC (3-wire) and 90–250 VAC (2-wire) versions.
What output options are available?
The DPRM Series is available with Normally Open (NO) and Normally Closed (NC) outputs.
Which industries commonly use full metal proximity sensors?
These sensors are widely used in steel plants, CNC machining, welding systems, automotive production, packaging machinery, robotics, conveyors, and heavy industrial automation.
Product Summary
The Denki Seigyo DPRM Series Full Metal Inductive Proximity Sensors combine rugged stainless-steel construction, 10 mm sensing distance, IP67 protection, and AC/DC operating options to deliver reliable metal object detection in harsh industrial environments. Designed for maximum durability and long service life, the DPRM Series is the ideal choice for demanding automation, manufacturing, and process control applications.
