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Process Transmitters
QPress – QDP-PROCESS 5400 Series
The QDP-PROCESS 5400 Series measures differential pressure on duties a direct sensor cannot reach: level in sealed or pressurised vessels, flow across an element, and density on hot or corrosive media. Remote diaphragm seals in 316L, Hastelloy or tantalum take the heat and chemistry at the tapping, while a 100:1 turn-down lets one transmitter cover wide, changing spans. HART, Modbus and a Bluetooth option ease setup, with approvals listed in the datasheet. Choose the 5400 when the measurement needs remote diaphragm seals or certified hazardous-area duty; the QDP-PROCESS 5600 is the higher-accuracy pick for direct-mounted DP.
Measurement range
−2.5…2.5 bar configurable
Accuracy
±0.25 % FS
Output / communications
4–20 mA, HART and Modbus RTU / RS485
Process connection
Flanged process connection
Process temperature
−50 to 85 °C
Approvals / Protection
ATEX / IECEx, up to IP67
Technical Specifications
| Pressure type | Differential |
|---|---|
| Response time | ≤100 ms |
| Process / ambient temperature | Without LCD −50…85 °C; With LCD −40…70 °C |
| Power supply | 18.3–44 V DC; IS 18.3–30 V DC |
| Outputs | 4–20 mA (HART) |
| Environmental rating | IP66; IP67 |
| Electrical connection | M20×1.5 entries; 1/2 NPT entries; cable gland; flameproof plug |
| Housing material | 316L SS or aluminium alloy (polyester coated) |
| Other ratings / standards | Vibration effect < 0.1 %SPAN (IEC 61298‑3) |
Key Features
- Remote diaphragm seals (316L, Hastelloy, tantalum, titanium) place the measurement on hot or corrosive media.
- IP66; IP67 ingress protection for demanding environments.
- Fast ≤100 ms response for dynamic measurement.
- 4–20 mA, HART and Modbus RTU / RS485 output for direct integration.
- Operates across −50 to 85 °C.
Typical Applications
- Filter & Line DP Monitoring
- Chemical Processing
- Power & Energy
- Food & Beverage
- Marine Systems