VEGA – The Level Sensors & Measurement Specialists
Level Sensors
A radar level measurement instrument uses microwave signals to determine the level of a liquid or solid.
The instrument is placed above the medium and emits a microwave signal which is reflected back to the sensor from the surface of the medium.
The radar level sensor uses this data to determine the distance to the product surface and is thus able to calculate the product level.
The radar level measurement technique is commonly used for measuring liquids and solids in the process industry – applications include process tanks, storage tanks and silos.
This non-contact form of level measurement, utilising VEGA VEGAPULS technology, mean the readings are not influenced by temperature, pressure or product properties.
Two different emission frequencies are available for the level measurement of liquids.
The compact, high-frequency K-band sensors VEGAPULS 61, 62 and 63 are particularly suitable for applications in which very high precision is required.
Excellent signal focusing is achieved even with small antenna sizes.
The low-frequency C-band sensors VEGAPULS 65 and 66, on the other hand, are better able to penetrate foam and strong condensate deposits and are thus suitable for especially difficult process conditions.
The high-frequency K-band sensors VEGAPULS 67 and 68 are applied for level measurement in bulk solids. Due to the excellent signal focussing, internal silo installations or build-up on the walls have no influence on the measurement.
The highly sensitive electronics, especially adapted to the requirements of bulk solids measurement, enables reliable level measurement of widely different products up to 75 metres.
Radar Level Sensors
The following VEGA selection table provides an overview of the VEGAPULS radar level sensors available – contact T&D Process & Instrumentation to discuss your level, pressure and temperature measurement requirements.
| Level Measurement Using Radar | VEGA VEGAPULS Radar Level Sensor | Application | Measuring Distance | Measuring Pressure | Process Temperature | Process Pressure |
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VEGAPULS 61 | Liquid level measurement | 35 metres | – | -40 to 80°C | -1 to 160 bar |
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 VEGAPULS 62 |  Liquid level measurement |  35 metres |  – |  -196 to 450°C |  -1 to 160 bar |
  |
 VEGAPULS 63 | Liquid level measurement (aggressive liquids and process conditions – hygienic and chemically stable applications) |  35 metres |  – |  -196 to 200°C |  -1 to 16 bar |
  |
 VEGAPULS 64 |  Liquid level measurement for storage tanks, dosing and process vessels with different process conditions or hygienic requirements |  30 metres |  – |  -40 to 200°C |   -1 to 20 bar |
  |
 VEGAPULS 65 |  Liquid level measurement of liquids despite foam – recommended for small process fittings |  35 metres |  – |  -40 to 150°C |  -1 to 20 bar |
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 VEGAPULS 66 |  Liquid level measurement – including strongly agitated media |  35 metres |  – |  -60 to 400°C |  -1 to 160 bar |
  |
 VEGAPULS 67 |  Liquid level measurement of bulk solids |  15 metres |  – |  -40 to 80°C |  -1 to 2 bar |
  |
 VEGAPULS 68 |  Liquid level measurement of bulk solids |  75 metres |  – |  -196 to 450 °C |  -1 to 160 bar |
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Thorne & Derrick International, based in the UK, distribute Explosion Proof & Hazardous Area Process Instrumentation Equipment (ATEX & IECEx Certified): this includes industrial measurement probes, humidity sensors, data loggers, handheld instruments and transmitters for temperature measurement and monitoring of relative humidity. Additionally, hazardous area instrumentation is also available for monitoring carbon dioxide, differential and process pressure, flow, dew point, water activity and analog signals.
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