Grundfos DPI & RPI Pressure Sensors for Industrial Applications
The Grundfos DPI and RPI pressure sensors deliver precise pressure measurement for industrial pump systems, water treatment, and process control applications. Featuring robust IP67 construction, wide temperature range capability, and flexible output options (4-20 mA or 0-10 V), these sensors integrate seamlessly with Grundfos pumps and control systems for reliable, accurate pressure monitoring in demanding environments.
As an authorized Grundfos Water Pump Dealer in Dubai, we supply the complete Grundfos DPI and RPI pressure sensor range with genuine warranty and technical support across the UAE.
Technical Specifications
| Parameter | Specification |
|---|---|
| Maximum Pressure | 28 bar (406 PSI) |
| Process Connection | ISO 228/1 – G ½” |
| Seal Materials | EPDM, FKM |
| Seal Dimensions | d1: 16.3 mm, d2: 2.4 mm |
| Tightening Torque | 20 Nm |
| Thread Engagement | 32 mm |
| Enclosure Protection | IP67 |
| Certifications | UL CCN: CYJV and CYJV7 |
Operating Conditions
| Parameter | Range |
|---|---|
| Media Temperature | -30°C to +120°C (-22°F to +248°F) |
| Ambient Temperature | -25°C to +60°C (-13°F to +140°F) |
| High Temperature Warning | >65°C (>149°F) requires caution |
Electrical Specifications
Current Output (4-20 mA):
| Parameter | Specification |
|---|---|
| Output Signal | 4-20 mA |
| Supply Voltage | 12.5-30 VDC |
| Maximum Load | 8 A |
| Connector | M12, IP67 |
Voltage Output (0-10 V):
| Parameter | Specification |
|---|---|
| Output Signal | 0-10 V |
| Supply Voltage | 16.6-30 VDC |
| Maximum Load | 8 A |
| Connector | M12, IP67 |
Voltage Output with Temperature (0-10 V +T):
| Parameter | Specification |
|---|---|
| Pressure Signal | 0-10 V |
| Temperature Signal | 0-10 V |
| Supply Voltage | 16.6-30 VDC |
| Connector | M12, IP67 |
Wiring Configuration
4-20 mA Output (3-wire):
| Pin | Function | Wire Colour |
|---|---|---|
| 1 | DC+ Supply | Brown |
| 3 | Pressure Signal (4-20 mA) | Blue |
| 4 | GND | Black |
0-10 V Output (3-wire):
| Pin | Function | Wire Colour |
|---|---|---|
| 1 | DC+ Supply | Brown |
| 3 | Pressure Signal (0-10 V) | Blue |
| 4 | GND | Black |
0-10 V + Temperature Output (4-wire):
| Pin | Function | Wire Colour |
|---|---|---|
| 1 | DC+ Supply | Brown |
| 2 | Temperature Signal (0-10 V) | White |
| 3 | Pressure Signal (0-10 V) | Blue |
| 4 | GND | Black |
Sensor Types Comparison
DPI – Single Pressure Sensor:
- Measures absolute or gauge pressure at single point
- Installed on pump discharge or system line
- Direct pressure measurement to pump/system
RPI – Differential Pressure Sensor (Two Sensors):
- Measures pressure difference between two points
- Sensor 1 (p+): High pressure side
- Sensor 2 (p-): Low pressure side
- Ideal for filter monitoring, flow measurement, pump differential pressure
Installation Guidelines
Process Connection:
- G ½” ISO 228/1 threaded connection
- Tightening torque: 20 Nm
- Thread engagement depth: 32 mm
Seal Options:
- EPDM – General purpose, water applications
- FKM – Chemical resistance, higher temperatures
Temperature Considerations:
- Media temperatures exceeding 65°C (149°F) require additional precautions
- Maximum media temperature: 120°C (248°F)
- Ambient temperature range: -25°C to +60°C
Electrical Connection:
- M12 connector with IP67 protection
- Verify supply voltage matches sensor specification
- Maximum circuit current: 8 A
Applications
Pump Systems
- Discharge pressure monitoring
- Suction pressure measurement
- Differential pressure across pump
- Cavitation prevention
Water Treatment
- Filter differential pressure monitoring
- Membrane pressure measurement
- Process pressure control
- Backwash initiation
HVAC Systems
- System pressure monitoring
- Chiller pressure measurement
- Boiler pressure control
- Expansion vessel monitoring
Industrial Process
- Pipeline pressure monitoring
- Tank level indication (pressure-based)
- Flow calculation (differential pressure)
- Safety pressure monitoring
Key Features
IP67 Protection Fully sealed construction provides protection against dust ingress and temporary water immersion, enabling reliable operation in harsh industrial environments.
Wide Temperature Range Media temperature capability from -30°C to +120°C accommodates heating, cooling, and process applications without additional protection.
Flexible Output Options Choose between 4-20 mA current output for noise immunity over long cable runs or 0-10 V voltage output for direct controller compatibility.
Temperature Measurement Option Combined pressure and temperature measurement (0-10 V +T variant) reduces sensor count and wiring complexity.
Standard M12 Connector Industry-standard M12 connector with IP67 rating ensures reliable electrical connection and easy replacement.
Global Certifications CE marking and UL certification (CCN: CYJV, CYJV7) enable worldwide installation compliance.
Compliance & Standards
EU Directives:
- Low Voltage Directive (2014/35/EU)
- EMC Directive (2014/30/EU)
Standards Applied:
- EN 61010-1:2010 (Safety)
- EN 61326-1:2006 (EMC)
- EN 61326-2-3:2013 (EMC for measurement applications)
Certifications:
- CE Marking
- UL Listed (CCN: CYJV, CYJV7)
Selection Guide
| Application | Recommended Sensor | Output Type |
|---|---|---|
| Pump discharge monitoring | DPI | 4-20 mA |
| Filter differential pressure | RPI (pair) | 4-20 mA |
| HVAC system pressure | DPI | 0-10 V |
| Combined pressure/temperature | DPI | 0-10 V +T |
| Long cable runs (>50m) | DPI/RPI | 4-20 mA |
| Direct PLC connection | DPI/RPI | 0-10 V |
Integration with Grundfos Systems
The DPI and RPI sensors integrate directly with Grundfos pump controllers and drives including:
- CUE variable frequency drives
- CU 352 multi-pump controllers
- MP 204 motor protection units
- Dedicated Controls systems
- Modular Controls systems
Analog inputs on these controllers accept both 4-20 mA and 0-10 V signals, enabling seamless pressure feedback for:
- Constant pressure control
- Proportional pressure control
- Differential pressure control
- Dry-running protection
- Overpressure protection
Genuine Grundfos Accessories & Parts
Complete your pressure sensing installation with genuine Grundfos accessories including M12 cables, cable assemblies, mounting brackets, seal kits (EPDM/FKM), and replacement sensors. We stock components for complete instrumentation solutions.
Select Grundfos Pumps
Browse our complete inventory of Grundfos DPI and RPI pressure sensors and compatible pump systems. As Grundfos Pump Suppliers in Dubai, we provide competitive pricing, technical consultation, and prompt delivery across Dubai, Sharjah, Abu Dhabi, Ajman, and all UAE locations.
Contact us for:
- DPI vs RPI sensor selection
- Output type recommendations (4-20 mA vs 0-10 V)
- Pressure range selection
- Seal material compatibility
- Cable and connector requirements
- Competitive quotations
- Delivery schedules
Precise Pressure Measurement for Industrial Reliability
The Grundfos DPI and RPI pressure sensors deliver the accuracy, durability, and flexibility that industrial applications demand. With IP67 protection, wide temperature capability, and multiple output options, these sensors provide reliable pressure feedback for pump control, process monitoring, and system protection—ensuring optimal performance and equipment longevity.