High frequency microwave impulses are coupled to a cable or rod and guided along the probe. The impulses are reflected by the product surface and received by the processing electronics.
Due to this measuring principle, the comprehensive adjustment with the product is no longer necessary. The instruments are adjusted to the ordered electrode length. The shortable cable and rod versions are suitable for individual adaptation to the local conditions.
Even process conditions such as high dust and noise generation or strong steamy atmospheres do not influence the accuracy of the measurement.
Density fluctuations, different granulation or even fluidising do not influence the accuracy. This applies also to the change from dry to wet gravel.
Strong build-up on the electrode or on the vessel wall does not affect the measuring result.
With measuring ranges up to 30 m, the sensors are also suitable for high vessels. Temperatures up to 150°C and pressures from vacuum up to 40 bar cover a wide application range.
By using a coaxial guide tube, VEGAFLEX 65 operates completely unaffected by vessel installations such as e.g. heating spirals or struts. A special adjustment is not necessary.
Extremely short microwave impulses with low emitted power in the C-band and K-band frequency range are emitted by the antenna system to the measured product, reflected by the product surface and received again by the antenna system. They spread with light velocity and the time from the emission to receipt of the signals is proportional to the level in the vessel. A special time spreading procedure enables a reliable and precise measurement of extremely short time periods.
By simply entering the vessel dimensions, a level-proportional signal can be displayed. An adjustment with emptied and filled vessel is no longer necessary!
The spreading of microwaves is virtually not affected by the ambient temperature and ambient pressure. Radar sensors are ideal for use under arduous process conditions. Pressures from vacuum to 160 bar and temperatures between -40 and 400°C are no problem for a radar level measurement.
Fluctuating product compositions or complete changes of the product do not influence the measurement result. A new adjustment is not necessary.
For measuring ranges up to 70 m, VEGA now has an optimised radar technology in its program. Due to its increased receiver sensitivity (factor 40), VEGAPULS 68 delivers reliable measured values in spite of higher signal damping in solids.
Non-contacting radar measurement delivers reliable levels in dusty environments, like in storage facilities for building materials. Also in the food processing industry, in steel production as well as for level measurement of powders and granulates in the chemical industry, the extended measuring range has proven to be extremely effective. Adjustable fl anges allow the eduction of false refl ections and the optimisation of the useful echo.
All advantages in an overview
- non-contact measurement
- unaffected by dust generation
- not infl uenced by fi lling noise
- high dynamic range of the sensor
- measuring range up to 70 m
- antenna cleaning by cooling air
- dust-Ex approval
Level sensor acc. to the measuring principle of the guided microwave (TDR)
For universal use in heavy solids and liquids
All advantages in an overview
- setup without adjustment
- independent of product features
- insensitive to dust, vapour and buildup
- probe can be shortened
- signal processing ECHOFOX for echo analysis with Fuzzy-Logic
Version: with exchangeable cable (ø 6 mm) or rod (ø 16 mm)
Measuring range cable: up to 60 m; rod: up to 6 m
Process fitting: from G1½A
Process temperature: -40 ... +150 °C
Process pressure: -1 ... +40 bar (-100 ... +4000 kPa)
Accuracy: ±5 mm
Rosemount level measurement transmitters from Emerson are designed to cut costs and increase safety by giving precise and reliable level data under most process conditions. Based on four different measurement principles - non-contacting radar, guided wave radar, vibrating fork level switch and differential pressure - the Rosemount product offering covers a wide range of level measuring technologies to fulfill easy and demanding applications.
The Rosemount 3300 provides reliable and cost effective level measurements in a wide range of applications. Guided Wave Radar technology combined with advanced signal processing and sensitivity enables the Rosemount 3300 Series to deliver both level and interface measurement data from the same transmitter. The 3300 series is now available with a new line of innovative probes, designed to perform reliably and withstand even the toughest process conditions. Two-wire connections ensure easy and inexpensive installation. Features include:
High temperature and pressure probes for extremely demanding level applications.
A wide range of probe styles to cover virtually any application.
Multivariable, loop-powered level and interface transmitter which reduces tank penetrations and installation cost.
Direct Level Measurement means no compensation required for changes in temperature, pressure, density, dielectric or conductivity.
Easy-to-use Radar Configuration Tools makes setup quick and easy and provides diagnostics with waveform plotting and logging tools.
Virtually unaffected by dust, vapor and interfering obstacles.
Robust modular design resulting in low operating cost and increased safety.
Easily integrated into existing plant architecture.
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Level sensors
