The XRATE GAS & WET GAS meter from Xsens provides accurate, reliable and cost effective flow measurement for gas or wetgas. The meter is clamped to the outside of a pipe and measures gasses with ultrasonic signals straight through the pipe wall. It measures the transit time of acoustic signals through the gas over the full bore of the pipe, measuring the full velocity profile to achieve high accuracy of 2% of flow in drygas.

The clamp on design allows for easy installation (2-3hrs) and it can be installed close to bends and valves if needed. Since the meter is not in contact with the gasses, it is not affected by erosion, corrosion or leakages. This makes the meter very reliable and robust, with minimal maintenance required.

This meter is used to measure gas and wetgas flow rates in tough, industrial environments. It has a lightweight design and is available from 1.5inch to 30inch as standard and bigger on request. It comes with an integrated flow computer to provide the required outputs through analogue 4-20ma or digital Modbus signals.

There is no limit on viscosity, density or sour service as it does not affect the measurement or the meter itself. We do have a minimum requirement of 15 bar pressure to provide accurate measurement. Turn down ratio is 1:25 meaning we can measure 1 to 25 m/s.

For remote installations we can offer WiFi, cellular and satellite signals while adding solar panels for power. The meter can be accessed remotely through internet connection to be monitored and updated if needed.
Local displays for local reading of measurements can be added on request.

The meter is Ex Zone 1 and 2 certified for hazardous areas and can also be supplied without such certification to reduce cost.

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  • Measure gas or wetgas flowrates from outside of a pipe
  • High accuracy 2% of flow in drygas
  • Can handle many types of gasses
  • Not influenced by differences in density of liquid and gas.
  • No limitation on viscosity, pressure or sour service
  • Pressure range from 15 bar and upwards.
  • The meter can correct for uneven flow distribution by measuring the full velocity profile through patented helical shaped transducers
  • Can be installed close to bends, valves and other restrictions
  • Clamp on design means easy installation in 2-3 hrs
  • Wide range of pipe line sizes from 1.5 inch to 30 inch or larger on request


Xsens Specification

Item Requirement Range
General 1 Line size 1.5″ to 36″ and higher
2 Line Schedule Any
3 Pipe Class Any
4 Pipe Material Carbon Steel, SS316,Duplex (others)
5 Hazardous Area Protection Atex, IECEx Zone 1 and 2
6 Explosion Group / Gas group IIB
7 Temperature class T3
8 Max Ambient temperature 60°C
9 Ingress Protection IP 66 (higher on request)
Process Conditions 10 Fluid Max 50% weight percentage liquid in gas
11 Phase Gas
12 Corrosive / Erosive Can handle both due to clamp-on design
13 Case Min Max
14 Flowrate m/s 1 25
15 Density No limit No limit
16 Design pressure No limit No limit
17 Design Temperature -20 deg C 100 deg C (higher as option)
Sensor 18 Sensor Type Ultrasonic non-intrusive (clamp-on type)
Up to six pairs (redundancy)
19 Measurement Principle Ultrasonic Guided Wave Transit Time & Time Of Flight
20 Housing Sensor Material SS316 / Aluminium
21 Cable from sensor to transmitter Armored, flame retardant type (xx meters length)
22 Uncertainty  +/- 2% of flow dry gas (add +/-0,01 m/s)
23 Turndown ratio 250:1
24 Removable Assembly Yes
25 Electrical Connection 4-20mA / Modbus (WiFi, Canbus, Profibus and other on request)
26 Upstream Straight Length 2-5D (target)
27 Downstream Straight Length 2-5D (target)
28 Flow Straighteners Not required
29 Static Mixer Not required
Transmitter 30 Housing Material SS316 / Aluminium
31 Calibration 0 – 100%
32 Electrical Connection To custom specifications
33 Power Supply 12-24 VDC (external power, or other).
Typical 9,5Watt and 11 watt at start up
34 Output Signal Modbus serial connected to flow computer via RS-485 /4-20mA
(others on request)
35 Mounting Integrated in sensor
Options 36 Pressure Transmitter NA
37 Temperature Transmitter 2*PT 100  elements included
38 Flow Computer NA
39 Local Display Optional
40 Mounting Kit Included
41 Weight From 25 kg to150 kg depending on size
42 Dimensions See GA drawings from Xsens
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