
Specs at a glance
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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)
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Nominal pipe size
DN 50 (2") … DN 150 (6")
Field of application
The FLOWSIC500 ultrasonic flowmeter enables extremely accurate natural gas distribution measurement. It is overload-proof, accurate and is monitored by an intelligent diagnostics system. It can easily be integrated into existing measuring stations. It operates either in a self-sufficient energy configuration or in failsafe network operation with battery back-up. It complies with all pertinent standards and directives and provides the security of a continuous and blockage-free gas supply.
Natural gas distribution in transfer and measuring stations for municipal and regional gas suppliers
Measuring stations in industrial and commercial applications
Device properties:
Diagnostics and permanent operational check
Rugged and reliable due to lack of moving parts
Exchangeable cartridge
Straight inlet/outlet zone not required
Overload-proof
Optional integrated flow conversion / date registration
Battery or intrinsically safe power supply
Benefits
Highest measurement certainty and safety of continuous gas supply
Reduction of installation costs due to integrated flow conversion
Simple installation, compatible with conventional technologies (turbine and rotary
displacement meters)Minimal operating costs due to being nearly maintenance-free
Simplified recalibration due to straightforward cartridge exchange
Reliable under dynamic load changes
Self-sufficient operation
Xpert selection
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Specialized products
- Designed for demanding applications
Technical excellence
Simplicity
Variable

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Standard products
- Reliable, robust and low-maintenance
Technical excellence
Simplicity
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Specialized products
- Designed for demanding applications
Technical excellence
Simplicity
Variable
FLEX selections | Technical excellence | Simplicity |
---|---|---|
Fundamental selection Meet your basic measurement needs |
Technical excellence
|
Simplicity
|
Lean selection Handle your core processes easily |
Technical excellence
|
Simplicity
|
Extended selection Optimize your processes with innovative technologies |
Technical excellence
|
Simplicity
|
Xpert selection Master your most challenging applications |
Technical excellence
|
Simplicity
Variable |
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Measuring principle
Ultrasonic transit time difference measurement
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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)
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Repeatability
≤ 0.1 %
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Accuracy
Qmin up to 0.1 Qmax ≤ ± 1 %
0.1 Qmax up to Qmax ≤ ± 0.5 %
Accuracy class 1; maximum allowed error limits
Qmin up to 0.1 Qmax ≤ ± 2 %
0.1 Qmax up to Qmax ≤ ± 1 %
After high pressure flow calibration: ±0.2 % at test pressure; otherwise ±0.5 % -
Medium temperature range
-25 °C ... +60 °C
Optional: –40 °C ... +70 °C
(–13 °F ... +140 °F
Optional: –40 °F ... +158 °F) -
Operating pressure range
PN16 (EN 1092-1): 0 bar (g) ... 16 bar (g) / 0 psi(g) ... 232 psi(g)
Class 150 (ASME B16.5): 0 bar (g) ... 20 bar (g) / 0 psi(g) ... 290 psi(g) -
Nominal pipe size
DN 50 (2") … DN 150 (6")
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Metrological approvals and certificates
MID: 2014/32/EU
OIML R 137-1&2:2012
EN 12405: 2010 (for integrated flow conversion) -
Hazardous area approvals
IECEx
Ex ia [ia] IIC T4 Gb, Ex op is IIC T4 Gb
ATEX
II 2G Ex ia [ia] IIC T4 Gb, II 2G Ex op is IIC T4 Gb
NEC/CEC (US/CA)
CSA: I.S. for Class 1 Division 1 Groups C and D T4; Ex/AEx ia IIB T4 Ga -
Digital Outputs
Configurations:
LF pulses + malfunction, electrically isolated (fmax = 100 Hz)
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
R-S485 (external powered, in combination with LF- or HF pulses)