Instrumentation Monthly Test | Measurement | Control
Revolutionary technology for level and volume measurement in the food and beverage industry
VEGA introduces the first contactless radar level sensor for liquids that operates at a 80 GHz frequency. Contactless radar technology is known for its immunity to temperature, pressure, vapours or surface conditions, but previous devices had larger antennas and restricted measuring capability. With a new, amazingly small antenna system, the VEGAPULS 64 is ideal for use in small vessels with small process connections, often seen in the food industry. However, there is also long range capability with narrow focussing too, enabling it to work even in very tall, narrow vessels for liquids (there is also a model designed for bulk solids for grain and powder level measurement). Hygienic materials and process connections also offer excellent process compatibility.
Using this high 80GHz transmission frequency means the sensors can be 3 times smaller, yet still achieve nearly the same focussed beam as larger devices using lower frequencies. This enables much smaller process fittings, from only ¾” – a significant advantage, especially for use in small vessels. Narrower beam angles also avoid agitators and obstructions, to clearly and reliably follow the liquid level.
Now, the level and volume of storage and processing vessels can be measured with much higher accuracy, unaffected by density change, both right up to the process fitting and down to the very bottom of the container. This is crucial for the food sector , because it maximises capacity and productivity, minimises waste.
Just as importantly, resistance to condensation and build up on the sensor face means even heavy splashing of viscous products like spreads and pastes do not block the radar signal. Condensation from process or cleaning, turbulence from mixers or even surface foam has no effect on the measurement. Flush hygienic fittings mean they clean efficiently too.
Another plus for this industry: since existing process connections can be used, the new sensor can be easily installed without costly equipment modifications. Aseptic process fittings are available with only PTFE as the wetted material. These process fittings meet the requirements of FDA,3A and EHEDG. Since radar signals pass right through plastic and glass containers, the sensor can also be mounted outside the tank in some cases. This method, too, has become much easier thanks to the higher transmission frequency – and this solution especially interesting for the food industry sector.