Air Differential Pressure Transmitters
Measurement range: -25Pa/+25Pa ...0/7000Pa - Accuracy: 1.5% - Output: 4-20mA, 0-10V - Max. Pressure: 400 kPA
When selecting a differential pressure transmitter , the measurement range (Pa/mbar) , output type (4–20 mA / 0–10V) , and application (HVAC, cleanroom, filter) are the most critical criteria. Because these devices measure particularly low pressures (at the Pa level), they must be selected with greater accuracy compared to conventional process transmitters.
What is an Air Differential Pressure Transmitter?
Air differential pressure transmitter:
- It measures the difference in air pressure between two points.
- It generally operates in Pa (Pascal) or mbar units.
- Used in HVAC and ventilation systems.
How it works:
- Total intraductal pressure and static pressure are measured.
- The difference between them is used to calculate air speed and flow rate.
These devices also convert the differential pressure they measure into an electrical signal and transmit it to the PLC/SCADA system.
Areas of Application
- HVAC (heating-cooling-ventilation)
- Cleanrooms (cleanroom pressure control)
- Filter clogging monitoring
- Laboratories and hospitals
- Fans and air ducts
Specifically, clogging is detected by measuring the filter before and after the process.
Advantages
- High sensitivity at low pressure.
- It provides energy efficiency (fan control)
- Improves air quality and process safety.
| DPT 250 | DPT 2500 | DPT 7000 |
| 0...25 Pa | -100...+100 Pa | 0...1000 Pa |
| 0...50 Pa | 0...100 Pa | 0...1500 Pa |
| 0...100 Pa | 0...250 Pa | 0...2000 Pa |
| 0...250 Pa | 0...500 Pa | 0...2500 Pa |
| -25...+25 Pa | 0...1000 Pa | 0...3000 Pa |
| -50...+50 Pa | 0...1500 Pa | 0...4000 Pa |
| -100...+100 Pa | 0...2000 Pa | 0...5000 Pa |
| -150...+150 Pa | 0...2500 Pa | 0...7000 Pa |