Differential Pressure Transmitter
Polwax DPT WM
Part Code. 0395
- Easy to Install and suitable for Panel Mounting
- Easy to configured via USB Interface
- High Accuracy and Stability
- Eight selectable units
- Compact and Robust Design
- Protection Rating: IP65 for outdoor & harsh environment use
The Polwax DPT50 Differential Pressure Transmitter is a versatile and high-performance pressure sensing solution designed for HVAC/R systems, building automation, industrial environments, and air quality monitoring. With field-configurable pressure ranges up to 0–7000 Pa, selectable engineering units (Pa, mmWC, inchWC, kPa, psi, mbar), and multiple output options (4-20 mA, 0-10 V, RS485 Modbus RTU), the DPT50 delivers precise, reliable differential pressure measurement with excellent accuracy and rapid response. Built for flexibility, it supports various mounting configurations and offers robust performance in demanding conditions, making it ideal for applications such as filter monitoring, fan control, and indoor air quality optimization.
Product Overview
The Polwax DPT50 Differential Pressure Transmitter is a high-performance and versatile pressure sensing solution tailored for modern building automation, HVAC/R systems, and industrial environments. It delivers precise and consistent differential pressure measurement with configurable pressure ranges and selectable engineering units, making it ideal for air filter monitoring, fan control, indoor air quality measurement, and balanced airflow applications.
Designed for flexibility and field adaptability, the DPT50 features user-configurable ranges and output options, including standard 4–20 mA, RS485 Modbus RTU, and optional 0–10 V, allowing seamless integration with Building Management Systems (BMS), PLCs, and automation platforms. Its broad unit selection—such as Pa, mmWC, inchWC, psi, kPa, and mbar—ensures easy alignment with application requirements.
The transmitter’s robust construction and universal mounting options (panel, wall, DIN rail, or duct mount) enable reliable operation across diverse installation environments. With fast response times, high accuracy, and durable IP54-rated housing, the DPT50 offers dependable performance in demanding HVAC, industrial process, and air quality control setups.
The PLX DPT 50 series of differential pressure transmitters is intended for HVAC/R building automation. The most advanced transmitters on the market today use a single device with field-selectable units, output, and range to measure both static and differential pressure. psi, inchWC, mmWC, mbar, kPa, and mbar are among the various measurement units with jumper-controlled field selection. There are eight measurement ranges that can be selected in the field, either bidirectionally or unidirectionally (see Model Summary). Voltage (0–10 V) and current (4–20 mA) are options for proportional output. An affordable differential pressure transmitter performance ratio for ventilation engineering air cooling applications. For optimal energy efficiency and a comfortable environment, the DPT 50 pressure-based air filter, fan, and air quality monitoring flow is a perfect fit for the differential.
Applications
HVAC
Ensures accurate monitoring of air and filter differential pressure in HVAC systems, helping maintain optimal airflow, energy efficiency, and system performance.
Clean Rooms
Maintains critical pressure differentials between clean zones to prevent contamination and ensure compliance with cleanroom standards.
Industrial Processes
Provides reliable differential pressure measurement for process monitoring, ensuring stable operation, safety, and improved process control.
Building Automation
Integrates seamlessly with BMS to monitor pressure variations, enabling automated control, improved comfort, and efficient facility management.
Pharmaceutical
Supports controlled environments by accurately monitoring room pressure to meet regulatory requirements and ensure product safety and quality.
Pump Stations
Monitors pressure differences across pumps and filters to optimize performance, detect blockages, and prevent system failures.
Technical Data
| Media Compatibility | Air, non-combustible, non-corrosive gases |
| Model No |
DPT50 WM/ DPT100 WM/ DPH100 WM |
| Part Code |
0395 3300/ 0395 3301/ 0395 3302 |
| Measuring Range |
0–7000 Pa / 0–7000 Pa / 0–7000 Pa & Temperature–RH: T: –30 to 80°C, RH: 0–100% |
| 10 Configurable Ranges |
0–25 Pa, 0–50 Pa, 0–100 Pa, 0–250 Pa, 0–500 Pa, 0–1000 Pa, 0–2000 Pa, 0–2500 Pa, 0–5000 Pa, 0–7000 Pa |
| Selectable Units | Pa & mmWC |
| Accuracy (from applied pressure) | ±0.25% / ±0.5% of F.S |
| Measuring Units | Pa, kPa, mbar, inchWC, mmWC, psi |
| Signal Connection | 3 Wire |
| Load Resistance | 47 to 470 Ω @ 24 VDC |
| Supply Voltage | 12–24 VDC |
| Operating Temperature | 10°C to 60°C |
| Storage Temperature | 10°C to 80°C |
| Pressure Limit | 1 PSI Maximum |
| Switch | Digital Push Button |
| Enclosure | ABS |
| Protection Class | IP54 |
| Electrical Connections | Screw Terminals |
| Process Connection | Push-on connection for 3/16” ID tubing |
| Weight | 70 Gram |
| Response Time | 500 ms |
| Output | 4–20 mA, RS485 Modbus RTU / 0–10 V (Optional) |
| Scope of Supply | Calibration Certificate / GUI Software, Manual |
Differential Pressure Transmitter – DPT WM
The Polwax DPT50 Differential Pressure Transmitter is a versatile and high-accuracy solution designed for HVAC, building automation, and industrial air monitoring applications. With wide configurable pressure ranges, selectable engineering units, and advanced communication options, the DPT50 ensures stable and precise differential pressure measurement for critical airflow and filter monitoring systems.
Multiple Model Options
Available as DPT50 WM, DPT100 WM, and DPH100 WM to suit pressure and Temp-RH applications.
Wide Pressure Range
Supports 10 configurable ranges from 0–25 Pa up to 0–7000 Pa for flexible deployment.
Multi-Parameter Measurement
DPH100 WM model supports differential pressure with temperature and humidity monitoring.
Selectable Engineering Units
Supports Pa, kPa, mbar, mmWC, inchWC, and psi for easy system compatibility.
Advanced Outputs
Offers 4–20 mA, RS485 Modbus RTU, and optional 0–10 V output for automation systems.
High Accuracy Performance
Delivers reliable differential pressure measurement with accuracy up to ±0.25% of F.S.
Rugged Industrial Housing
Durable IP54-rated ABS enclosure ensures stable operation in harsh environments.
Easy Installation
Compact design with push-on tubing connection enables quick panel or wall mounting.
