XRATE LIQUID
ON/OFF-LOADING

PRODUCTS

XRATE LIQUID
ON-OFFLOADING

PRODUCTS

The XRATE Liquid On- and Offloading meter from Xsens provides accurate, reliable and cost effective flow measurement for any liquid. The meter is clamped to the outside of a pipe and measures liquids with ultrasonic signals straight through the pipe wall. It measures the transit time of acoustic signals through the liquid over the full bore of the pipe, measuring the full velocity profile to achieve high accuracy of 1% of flow. It typically provides an output in m3/hr or any other metric that clients require.

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 liquids, it is not affected by erosion, corrosion, waxing, scaling or leakages. This makes the meter very reliable and robust, with minimal maintenance required.

This meter is used to measure oil flow rates in tough onshore and offshore 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 pressure, viscosity, density or sour service as it does not affect the measurement or the meter itself. Turn down ratio is 1:400 meaning we can measure 0,1 to 40 m/s. There is also no need for static mixers or flow straighteners as the meter measures the full velocity profile.

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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Benefits Industries Video Specification Documents News

Benefits

Measure liquid flowrates from outside of a pipe
High accuracy 2% of flow (including presence of gas)
Handles oil flow rates including free gas (up to 20%)
No limitation on density, viscosity, pressure or sour service
The meter can correct for uneven flow distribution by measuring the full velocity profile through patented helical shaped transducers
Rugged design for tough weather conditions and marine conditions
Can be installed close to bends, valves and other restrictions
Clamp on design means easy installation in 2-3 hrs
Very suitable for large pipe diameters (standard up to 30”, larger on request)

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Industries

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Video

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	Hydrocarbon / Water / Liquid mixture
	11	Phase	Liquid with or without gas (typically up to 20% GVF)
	12	Corrosive / Erosive	Can handle both due to clamp-on design
	13	Case	Min	Max
	14	Flowrate m/s	0.1	40
	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)
	18	Viscosity	Range from water to heavy bunker oil
Sensor	19	Sensor Type	Ultrasonic non-intrusive (clamp-on type) Up to six pairs (redundancy)
	20	Measurement Principle	Ultrasonic Guided Wave Transit Time & Time Of Flight and Doppler
	21	Housing Sensor Material	SS316 / Aluminium
	22	Cable from sensor to transmitter	Armored, flame retardant type (xx meters length)
	23	Uncertainty	+/- 2% of flow at 0 gas and +/-5% up to 10% GVF (add +/-0,01 m/s) of actual flow rate
	24	Turndown ratio	400:1
	25	Removable Assembly	Yes
	26	Electrical Connection	4-20mA / Modbus (WiFi, Canbus, Profibus and other on request)
	27	Upstream Straight Length	2-5D (target)
	28	Downstream Straight Length	2-5D (target)
	29	Flow Straighteners	Not required
	30	Static Mixer	Not required
Transmitter	31	Housing Material	SS316 / Aluminium
	32	Calibration	0 – 100%
	33	Electrical Connection	To custom specifications
	34	Power Supply	12-24 VDC (external power, or other). Typical 9,5Watt and 11 watt at start up
	35	Output Signal	Modbus serial connected to flow computer via RS-485 /4-20mA (others on request)
	36	Mounting	Integrated in sensor
Options	37	Pressure Transmitter	NA
	38	Temperature Transmitter	2*PT 100 elements included
	39	Flow Computer	NA
	40	Local Display	Optional
	41	Mounting Kit	Included
	42	Weight	From 25 kg to150 kg depending on size
	43	Dimensions	See GA drawings from Xsens