Product Review: LEEG DMP305X-TST-H

This week’s product reviews cover low-end gauge pressure transmitters – great for flexibility, not so much for advanced features or digital communication.

Today we have a gauge pressure device from LEEG Instruments I present to you the: DMP305X-TST-H! The LEEG name might seem unfamiliar, but it has an interesting portfolio. Let’s see the features of this device and find out where you can fit it in. Ready? Then keep reading!

Disclaimer: This product review examines only features, not performance. If you’ve used this device, feel free to share your experience  in the comments.

Whatcha got there?

LEEG Instruments caught my attention in a search for new vendors on the market. I picked the DMP305X-TST-H to review here and compare with a similar product from a big brand. Both brands happen to be Asian, but I didn’t plan that.

This gauge pressure device resembles most other pressure field devices, but you should expect that. However, the mix of red and white looks very good. It has an optional local display to read the process variable and output. I didn’t find much about it in the document, but the LCD looks like a simple display without graphic features.

LEEG Instruments gauge pressure device
courtesy of LEEG Instruments

On the upside, the display has three push buttons for local configuration in safe areas. In dangerous areas, you can use the external buttons on top of the device below the identification plate. The company has a manual on its website, but the interface and the logic behind it shouldn’t take you long to learn.

Sadly, the gauge pressure device lacks protocols for broad, seamless integration, just analog, and HART again. But pay attention, because it needs 10.5-55 volts of direct current in the analog version and 16.5-55 for the HART.

What can it do?

As a gauge pressure transmitter, LEEG Instruments DMP305X-TST-H has a wide range of applications it can cover, like absolute or differential pressure measurement. If you missed the explanation of these pressures, you can read that here.

You get a standard accuracy of +-0.075 percent in the upper range limit (URL), but you can select an option to improve it to +-0.05 percent, pretty average among its competitors. However, its stability is +-0.2 percent URL/year. Yup, 0.1 percent below the others, but if you have a typical process, then you shouldn’t have a problem with it.

You can deploy it in temperatures from -40 to 120 degrees Celsius, and you can choose from six options of the pressure range. For instance, you can pick the range from -0.1 to 10 megapascals (MPa), with an overload limit of 25 MPa.

Why should I care?

Because it covers a lot of ground for a low-end device. The DMP305X-TST-H has a IP67 rating and flameproof, intrinsic safety, and CE certificates. Furthermore, it has many standard connection options to fit your process.

No advanced functions, though. Using HART, you can send your primary data to your control system, or you can set up and read that data with a handheld. And that’s it.


LEEG Instruments DMP305X-TST-H has enough options for most standard applications, although lacks digital protocols and advanced diagnostics. If you just want a simple device, then you can scale this one out and find out how it performs using your process information.

This video will tell you more about  the DMP305X-TST:

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