Guided Wave Radar Level Measurement Using VEGA VEGAFLEX Sensors – How Does it Work?

Published 13 Dec 2016

By Chris Dodds : estimated reading time 5 minutes

VEGA VEGAFLEX

Level Sensors

Guided Wave Radar Level Sensor

A guided wave radar level sensor utilising VEGA VEGAFLEX technology uses microwave pulses which are conducted along a cable or rod measuring probe. The measuring probe of the level sensor ensures that the signal reaches the medium undisturbed. The pulse signal is reflected by the mediums surface and is received by the processing electronics. This information is then used and converted into level information.

Level Sensors

Main Level Sensing Applications

The level of almost any liquid or solid can be measured using VEGA guided wave radar sensors. Guided radar is virtually unaffected by changes to product or process temperature, pressure, density, conductivity, vapours, build up or dust. No moving parts mean the radar level sensors are extremely reliable and eliminates the need for recalibration.

All guided wave radar sensors have built in linearisation software to calculate the level versus shape and provide direct output of volume on:-

Storage Vessels
Processing & Manufacturing
Level Indication – Silos & Hoppers
Interfaces

VEGA are the worlds’ No.1 process radar manufacturer, with the experience of over 200,000 successful installations. In 1997 VEGA introduced the first two wire, loop powered radar to the market and are the established leaders in this field.

VEga VEGAFLEX Guided Wave Radar Level Sensors

VEGAFLEX series of guided wave radar level sensors are usually mounted from the top. Calibration is easy and uses a small entry to the vessel (from ¾” BSP). VEGAFLEX is part of the plics® family:

Uses VEGA plics® platform for uniform design, feel and operation
Make level sensor selection easier, for faster ordering and delivery
Simple set up, faster commissioning, saves time and money
Trend and data logging on in head display, VEGA PLICSCOM for real time analysis
Echo pictures in head offer performance evaluation without laptops
Cost of purchase and ownership among the lowest in its class

Guided wave radar level measurement

Measuring range up to 60 metres and can measure very close to the sensor
High resolution and security of level measurement – unaffected by dust, vapours and build-up
Built-in echo curve, data logging and trend on the local display
4-20 mA two-wire sensors (loop powered)
Level sensors with digital data transmission (Profibus and FF)

Reliable

Unaffected by product: changing density, conductivity, moisture, dielectric constant
No influence from surface reflections, such as agitation, foam or angle of repose from solids
On solids and powders, filling clouds/dust and obstructions that cause many non-contact systems to misread are no problem either

The following VEGA selection table provides an overview of the VEGAFLEX guided wave radar level sensors available – contact T&D Process & Instrumentation to discuss your level, pressure and temperature measurement requirements.

Level Measurement Using Guided Wave Radar	VEGA VEGAFLEX Guided Wave Radar Level Sensor	Application	Measuring Distance	Measuring Pressure	Process Temperature	Process Pressure
	VEGAFLEX 81	Liquid level measurement including all liquids – applications with vapour, build-up, foam or condensation	75 metres	–	-60 to 200°C	-1 to 40 bar
	VEGAFLEX 82	Level measurement of light and heavyweight bulk solids, applications with strong dust generation, condensation or buildup	75 metres	–	-40 to 200 °C	-1 to 40 bar
	VEGAFLEX 83	Liquid level measurement of aggressive liquids or liquid media with highest hygienic requirements, applications with vapour, build-up, foam generation or condensation	32 metres	–	-40 to 150°C	-1 to 16 bar
	VEGAFLEX 86	Level measurement of virtually all liquids under extreme pressure and temperature conditions, applications with build-up, foam generation or condensation	75 metres	–	-196 to 450°C	-1 to 400 bar
	VEGAFLEX 61	Level Measurement	32 metres	–	-40 to 150°C	-1 to 40 bar
	VEGAFLEX 62	Level Measurement	60 metres	–	-40 to 150°C	-1 to 40 bar
	VEGAFLEX 63	Level Measurement	32 metres	–	-40 to 150°C	0.5 to 16 bar
	VEGAFLEX 65	Level Measurement	6 metres	–	-40 to 150°C	-1 to 40 bar

For more information on the VEGAFLEX series of level sensors or any of VEGA’s pressure and level measurement instrumentation please contact a T&D Technical Sales Engineer today.

VEGA Guided Wave Radar VEGAFLEX Series 80

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