#WishIknew What’s the best level measurement principle?


When you have a question about process automation that needs a short answer, let us know with #WishIknew and #Visaya! We’ll reply with a #WishIknew post. It’ll give a quick explanation, then some related articles, videos, or reviews if you want to know more.

I wish I knew what the best level measurement principle is!

A few months ago, I read an article on flow meters where the author wisely concluded by saying there is no best level measurement principle for flow meters. I completely agree. One flow meter or level meter or whatever can’t cover all conditions! Same goes for brands; some have more features than others, but you may not need those features.

We can discuss pros and cons, but your process data dictate what device will give you the accuracy or lifespan or stability you need. However, I can give you the relevant points about the most common level devices on the market. Beyond that, you can find more content on Visaya that explains each in detail.

  • Differential pressure transmitter: Classic but limited in unstable densities and has mechanical structure in most applications
  • Free space radar: Non-contact and requires a minimum dielectric value
  • Guided wave radar: Makes contact with the product, has specific installation requirements but can install in low dielectric values
  • Capacitance level transmitter: Needs two capacitor plates (either the vessel wall or another probe), makes contact with the product, and limited media

These articles will tell you more about those level measurement principles:

Differential pressure transmitter in flow measurement

How does radar level measurement work?

Guided wave radar and you!

Where can I use the capacitive level transmitter? Can you tell me more about it and how I install it?

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