Yep, another level transmitter! The market has a ton of them. So if you need a low-budget device with good accuracy and flexibility, then stick around to read more about the Prosonic FMU30 from Endress+Hauser. Let’s find out where you can use it, how it works, and whether it will work for you.

Disclaimer: This product review examines only features, not performance. If you’ve used this device, feel free to share your experience in the comments. This content serves the purpose of providing information if you want a new device.

What can it do?

This ultrasonic level transmitter use the time-of-flight method to read levels. You can read our definitive guide to time-of-flight (ToF) devices later if you want. Anyway, the FMU30’s design follows a concept you’ll see throughout the Endress+Hauser portfolio, straightforward and minimalist.

You can configure the FMU30 in two ways. On the one hand, you can use a local display to set everything up. It has three buttons ( -, +, and enter) to navigate the menu, and an LCD to show you process data, configuration details, bar graphs, and envelope curves.

On the other hand, if you want to configure the device remotely, then you can use FieldCare or DeviceCare with an FXA291 setup. This software offers a strong user interface and faster configuration if you’ve used such tools before.

What can it do?

The Prosonic FMU30 can measure level and convert that data to length, volume, and flow rate. On top of that, it can measure liquids and bulk materials, although its maximum range will depend on the sensor you pick.

The 1½- inch sensor has a range of five meters in liquids and two meters in bulk material.  With the 2-inch sensor, you’ll get eight meters in liquids and 3.5 meters in bulk material.

The FMU30 has no contact with the product and installs using thread connections from G1½ or NPT 1½. If you need a diagnostic, then you can pull an envelope curve on the local display.

Furthermore, this device withstands temperatures from -20 to 60 °C and pressures from 0.7 bar to 3 bars absolute, with wetted materials available in PP and EPDM.

Why should I care?

The Prosonic FMU30 offers limited output options, but its analog signal covers most applications out there. And its loop-powered nature lets you use only two wires to receive power and communication.

Image of Prosonic T FMU30
Image courtesy of Endress+Hauser

Endress+Hauser pegs its accuracy at +-3 mm or +-0.2 percent of the set measuring range. This value adequately serves this type of device and its category.

Last, it has certificates and approvals, if you need that sort of thing. You’ll find all those on Visaya eshop.


So the Prosonic FMU30 is a low-cost solution for level, volume, length, and flow rate measurement in various segments. By the way, it also offers seven languages to improve the user experience and a flexible measuring range. You can compare it with some other options on the right to get the most bang for your buck.

Buy Prosonic T FMU30 in our online shop

To know more about level transmitters, you can get in touch with our engineers and we will be happy to help.

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