We have two kinds of radar level transmitters: free space and guided wave. Free space radars never make contact with the product, but if you have high turbulence or low dielectric constant (DC), then you might want to go with a guided wave radar. It has a probe in constant contact with the product to guide the waves created by the transmitter.

Both types of radar level measurement work with the same principle: time of flight or ToF. The radar level transmitters generate electromagnetic waves that travel from the device to the product and return. The product needs to have a minimum DC to reflect the signal. Then the radar can calculate the level, because the time of emission and return is proportional to the distance.

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Everything inside the tank that conducts energy, such as level switches or heater systems, can reflect the signal. If the product has a low dielectric level, then the radar may find a false level. You may also wind up with bad readings from vapor, foam, or other product conditions.

You can find many solutions to avoid this issue – high-frequency radar level transmitters, echo analysis, stilling wells, and more. Then the radar level measurement can be very accurate.

List of the non-contact radar level transmitters on the Visaya eShop:

More articles on radar level measurement:

Non-contact radar level transmitters and their frequency bands! This article tells you more about non-contact radar level transmitters, also known as free space radars. This will help you find that they have various frequency options as well.

Guided wave radar and you! – This article explains when you should apply a guided wave radar rather than a non-contact radar.

The definitive guide to time of flight (ToF) devices – This article discusses  Time of flight (ToF) devices measure level, just like differential pressure (DP) transmitters.

To know more about radars, you can get in touch with our engineers!

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