"Specs at a glance
Measured variables
Volume a. c., volumetric flow a. c., gas velocity, volume s. c.
(*), volume flow under s.c. (*)
(*) additional function included with integrated volume correction
Measuring Medium
Natural gas (dry, odorized), air
Nominal pipe size
DN 50 (2) … DN 150 (6)" "Field of application
State-of-the-art technology for maximum measurement accuracy: The
FLOWSIC550 ultrasonic compact gas flowmeter ensures highly accurate
billing of low volume flows in high-pressure networks – a perfect
complement to the FLOWSIC500. It is overload-proof, accurate and is
monitored by an intelligent diagnostics system. FLOWSIC550 can be
easily integrated into existing measuring stations. When used in
transfer and measuring stations, FLOWSIC550 ensures a continuous
and blockage-free gas supply.
Gas Measurement of low volume applications at high pressures
Custody transfer: gas distribution, storage, and transmission
systems
Town border stations and city gate stations
Device properties:
Diagnostics and permanent operational self-monitoring
Durable and reliable without moving parts
Compact meter installations
Integrated volume correction
Battery or intrinsically safe power supply
Bluetooth Low Energy (BLE)" "Benefits
Ultimate measurement certainty and safety of continuous gas supply
Simple installation, replacement of turbine gas meters
Reduction of installation costs due to integrated volume correction
Easy Commissioning and data reading via FLOWgateTM (PC and App)
Minimal operating costs due to being nearly maintenance-free
Reliable even when the gas flow fluctuates (on/off applications)
Self-sufficient operation possible" "Measuring principle
Ultrasonic transit time difference measurement
Measured variables
Volume a. c., volumetric flow a. c., gas velocity, volume s. c.
(*), volume flow under s.c. (*)
(*) additional function included with integrated volume correction
Measuring Medium
Natural gas (dry, odorized), air
Repeatability
≤ 0.1 %
Accuracy
Qmin up to Qmax ≤ ± 1 %; Accuracy class 1; typical error limits
Qmin up to 0.1 Qmax ≤ ± 2 %; Accuracy class 1; maximum allowed
error limits
0.1 Qmax up to Qmax ≤ ± 1 %; Accuracy class 1; maximum allowed
error limits
After high pressure flow calibration: ±0.2 % at test pressure;
otherwise ±0.5 %
Medium temperature range
–40 °C ... +70 °C
Operating pressure range
ANSI300 (ASME B16.5) ≤ 48.7 bar (g); for –40 ... +70°C
ANSI600 (ASME B16.5) ≤ 97.4 bar (g); for –40 ... +70°C
PN40 (EN 1092-1) ≤ 40 bar (g); for –40 ... +70°C
PN63 (EN 1092-1) ≤ 63 bar (g); for –40 ... +70°C
Nominal pipe size
DN 50 (2) … DN 150 (6)
Metrological approvals and certificates
MID: 2014/32/EU
OIML R 137-1&2:2012
EN 12405: 2010 (for integrated volume correction)
AGA 9, 2022
Hazardous area approvals
IECEx:
Ex ia [ia Ga] T4 IIB Gb
ATEX:
II 2 (1)G Ex ia [ia Ga] T4 IIB Gb
NEC/CEC (US/CA):
Class I Division 1, Groups C, D T4 Ex ia [ia Ga] IIB T4 Gb
Class I, Zone 1 AEx ia [ia Ga] IIB T4 Gb
Digital Outputs
2x Pulse and Status (HF with fmax = 2kHz, LF with fmax = 10 Hz)
2x RS485, external powered
Encoder
HF pulses + malfunction, electrically isolated (fmax = 2 kHz)
Encoder + LF pulses, electrically isolated (fmax = 100 Hz)
Encoder + HF pulses, not electrically isolated (fmax = 2 kHz)
2x pulses, HF and LF, electrically isolated (fmax = 2 kHz / 100 Hz)
Digital communication
Modbus RTU
Modbus ASCII"
