Buyer guide: Rosemount 1066 and Hamilton H100

A warm welcome from Visaya to all the technophiles reading this article! So far, we’ve reviewed some great products from various companies in the field of analytical transmitters. Today we’ll go over a couple of entry-level devices, the Rosemount 1066 and the Hamilton H100.

In the beginning, we took up this task to present insights on top-of-the-line devices, but on exploring, we found that some entry-level instruments can compete with fancier devices on the market. Let’s take a look and see if these hold up!

But before we get into the discussion, you should that this guide examines only features, not performance. If you’ve used this device, feel free to share your experience in the comments. So let the games begin!

Rosemount 1066

 Emerson caters to the needs of a broad spectrum of users with everything from entry-level gadgets to sophisticated tools that only technicians can comprehend. So let’s cut to the chase and see if this can impress you!


While this device doesn’t light you up at first glance, it has more to it than meets the eye. The 1066 has a good-sized display screen at 58 by 78 millimeters (mm) and the usual local keypad. The datasheet gives the full specs at 155 by 155 by 139 mm and a weight of approximately 1.5 kilograms.

image of Rosemount 1066
Courtesy of Emerson

Okay, why do I keep expecting multi-parameter devices to have more than two channels? Oh, I don’t know, maybe because the phrase “multi-parameter” kinda sets me up for higher expectations? Sad to say, the 1066 only has one channel, so this multi-whatever can only read one sensor at a time.

On the bright side, it does offer a broader spectrum of data measurement than its competitors. It can measure pH/oxidation-reduction potential (ORP), resistivity, conductivity, percent of concentration, chlorine, monochloramine, dissolved oxygen, dissolved ozone, and temperature. What more could you want?


The 1066 can measure all those process variables, which can save time in setup, diagnostics, and maintenance of multiple devices, so that’s nice. It also has a protection level of IP66, making it dust-tight and resistant to heavy water jets, and a polycarbonate covering.

Additionally, it comes with top-notch approvals for hazardous protections such as CSA, ATEX, and IECEx, making this device great for petrochemical processes.

image of Rosemount 1066
Courtesy of Emerson

And it’s loop powered, so it only needs two wires, which will trim your structure and costs. It supports analog, HART, and FOUNDATION Fieldbus (FF) but no PROFIBUS PA. Emerson doesn’t do that one – a mystery for the ages.


It’s Emerson. Need I say more? Well, of course I do. And I will!

For an entry-level device, it has a clean interface and smooth navigation, although the display could use a backlight. Alerts flash to catch your eye, and pressing the DIAG button can tell you what happened. The screen also shows temperature and the digital communication icon, so you know you’re hooked up.

And that’s the Rosemount 1066. Ready for the next?

Hamilton H100

Hamilton hasn’t had as much screen-time on Visaya as Emerson, but that doesn’t mean it’s not worth your time. Let’s check out the H100 and its variants, and maybe you’ll see something you like.


The H100 design looks like all the rest, but repeat after me – entry-level device. It comes with a nice LCD with seven segments and icons to show your data well, even from a distance. It doesn’t have a backlight, but neither does the 1066. This will give you your measurements, calibration, alarms, and configuration, though. Keeping it simple here.

Courtesy of Hamilton

It sits at 144 by 144 by 105 mm and almost a kilogram sans extras. Speaking of extras, we have a lot of extra models for this one: H100 pH, H100 DO, H100 COND, and finally the H100 CONDI. Each measures a different variable, so if you decide to buy one, choose carefully!


The H100 can measure pH/ORP, dissolved oxygen, and conductivity, but it has no loop power, just the four-wire concept. As for its housing, you get polybutylene terephthalate (PBT) for an enclosure and IP65 for a protection rating. But no hazardous approvals that I could find. So anybody from Hamilton want to chime in?


image of Hamilton H100
Courtesy of Tablazat

As for integration, nothing but analog here, no digital. Bummer!


 It’ll do the work, ’nuff said. Oh wait, almost forgot! The H100 comes with Sensoface, to check your zero/slope, calibration interval, and response time. And the Sensocheck helps you monitor open and closed circuits. Those are a couple of pleasant surprises from a budget gadget!

Table of comparison

Category Rosemount 1066  Hamilton H100


1 Unboxing conventional design, clear display, local keypad, decent menu same – conventional design, clear display, local keypad, decent menu tie, obviously
2 Power and protocol loop power; analog, HART, FF not loop powered; no digital protocols, just analog 1066
3 Measurement pH/ORP, resistivity, conductivity, percent of concentration, chlorine, monochloramine, dissolved oxygen, dissolved ozone, and temperature – but only one input channel pH/ORP, conductivity, and dissolved oxygen; for more variables, switch to H100 pH, H100 DO, H100 COND, or H100 CONDI – and again, single input 1066
4 Housing material and approvals polycarbonate with IP66 rating; approvals such as CSA, ATEX, and IECEx PBT enclosure rated at IP65; no information on approvals 1066
5 General information and documentation responsive site, easy-to-find docs; solid mobile platform; device page could use some updating weak site, weak mobile access, weak docs 1066


Yes, the Rosemount 1066 does come out ahead on our table. But that doesn’t rule out the Hamilton H100 completely. It has a decent interface, display, and diagnostics. So if you want a simple, low-cost device, then the H100 may work for you.

We don’t rule any of them out here unless they just don’t do the job. We haven’t come across any of those yet. But if we do, we’ll let you know!



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