Product Review: DPT 200 from BD|SENSORS
Product review time! Last week, we reviewed an ultrasonic flow meter. If you haven’t read that yet, click here to learn about this low-budget device. Today, we’ve circled back to one of the most flexible devices on the market, the differential pressure (DP) transmitter. Before we start chatting about the DPT 200, let’s do a refresher on DP devices in general.
DP transmitters can measure level, flow, and even pressure, making it the go-to choice for many years on 90 percent of the applications out there. Today, you can find plenty of principles and devices to compete with or even outperform the DP meter. But this device remains popular because everyone knows how to handle it and it’s cheaper than some of its high-performance competitors.
But enough of that! Let’s talk about the DPT 200 from BD|SENSORS!
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.
Whatcha got there?
The DPT 200 looks like most DP transmitters, so nothing new design-wise. It has an optional local display with two lines, eight digits, and a bar graph from zero to 100 percent. Humble, but it provides what you need.
If you want to set up using the display, then you need to order the display with this feature. Otherwise, you’ll only get off and span buttons and have to configure through the HART protocol.
While not new, this device brings a good range of possibilities with a fairly competitive price tag. However, to measure flow, you need the model with the square root function.
And although the DPT 200 runs on loop power, it only has analog and HART for protocols. I’m sure that a digital protocol like PROFIBUS PA could expand this device’s usage, so maybe BD|SENSORS should consider that.
What can it do?
As I said earlier, it can measure pressure, level, and flow, although for flow you need the right option selected on your order form. You also can pick five types of measuring range for the differential pressure. For instance, type A can measure from 0 to 10 millibars, type B from 0 to 60, and type E from 0 to 20 bar. You can see all the ranges on the DPT 200 page in Visaya’s device directory.
And for static pressure, you can pick three options, up to 70 bar for type A sensors, 160 for type B-E, and 400 for type C-E. The vendor gives it a standard accuracy of 0.075 percent at full-scale output (FSO). That’s decent, but I didn’t find an option for more accuracy when I looked.
Now, let’s get material. You have die-cast aluminum for the standard housing and 304 stainless steel as optional. The diaphragm has 316L stainless steel as its standard with the option to get Hastelloy C-276. For more on the materials, take a peek at the device page.
Why should I care?
The DPT 200 offers a good measuring range and the most common options for integration. It also has a long list of process connections to fit your application, and valves and seals in a variety of materials. You get silicone oil for the filling fluid as standard, but you can request other options.
Although with HART you won’t get much for fancy features, you can access all your data on your device’s conditions.
The DPT 200 fits in multiple applications to measure flow, level, and pressure. It comes with the most common output and a few perks, so if you only need a basic device, then this one might help. You can find other choices on the right side of this page, if you want to do some comparing. Happy shopping!
Again, I didn’t find any related videos, so have some more music: