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Coriolis Flow Meters
QFlow – QMASS 5503 Series
The QFlow QMASS 5503 is an ultra-compact DN3 bent-tube Coriolis mass flow meter for precise low-flow liquid dosing in oil, gas and chemical processes. Its bent-tube sensor measures mass flow directly across 0 to 360 kg/h with accuracy from ±0.1 % of reading, and 4–20 mA with HART and Modbus RTU outputs suit both analogue loops and digital control. Flanged process connections rated to 4 MPa make it a compact, accurate choice for small dosing and injection lines. Within the QMASS family this is the smallest size, for dosing duties to 360 kg/h; sister sizes run up to 480,000 kg/h.
Measurement range
0 to 360 kg/h mass flow
Accuracy
Up to ±0.1 % of reading
Output / communications
4–20 mA, HART and Modbus RTU / RS485
Process connection
Flanged process connection
Process temperature
−200 to +300 °C
Approvals / Protection
IECEx, up to IP67
Technical Specifications
| Nominal size | DN3 measuring tube; DN15 flanged process connections |
|---|---|
| Repeatability | ±0.05 to ±0.25 % of reading depending on selected grade |
| Ambient temperature | −40 to +60 °C depending on transmitter version |
| Environmental / enclosure rating | Sensor and transmitter enclosures rated to IP65/IP67 |
| Power supply | Universal power supply 85 to 265 V AC or 12 to 24 V DC |
Key Features
- Stable measurement when process conditions change.
- Designed for demanding industrial environments.
- Supports confident measurement in critical process applications.
- Integrates easily with modern industrial control systems.
- Local setup without opening the enclosure.
Typical Applications
- Oil and gas - chemical injection
- Chemical processing - catalyst and additive dosing
- Food and beverage - high-accuracy flavour
- Alternative energy - hydrogen
- General industrial utilities