Ohaus Scout STX – a touchscreen scale done right

The first scale with a touchscreen display that I ever used took a while to start up, reacted sluggishly and – if I remember this correctly – required me to set up a user account before it would let me actually use it. That was a few years ago, but still, I was a bit skeptical when Ohaus announced that the newest model in their legendary Scout series would now have a touchscreen, too. However, after purchasing the cheapest Scout STX (the STX 421) and testing it extensively over several weeks, I can say that my worries were unfounded.

Startup time

As you can see in this short video, the Scout STX is even faster than the Ohaus Ranger 3000:

Settings

How many scales can truly claim to be so easy to set up that you never have to look at the manual? As an example, here’s how you change the language: Touch “Menu”, then you’ll see 8 settings, of which “Balance Setup” looks the most promising. You’ll now see another seven settings with “Language” being the first one:

Should you ever find yourself somewhere you didn’t want to go, you can simply touch “Back” to go back to the previous screen.

Somewhat embarrassingly, the only thing I actually had to look up was how to change into another application mode: Instead of going through the menu, you simply touch the application name shown in the top left corner of the screen. I’m just not used to things being so intuitive.

9 applications

The touchscreen really shines when it comes to different applications. As you can see in this video of me using the parts counting mode with auto-optimization, the STX can even replace a dedicated counting scale:

12 seconds into the video, the scale displays an entire number block to let me enter the average piece weight or number of samples. There’s simply no way to achieve this kind of application flexibility and user friendliness without a touchscreen.

Touchscreen disadvantages

One common complaint about touchscreens is the lack of tactile feedback. Fortunately, the most frequently used buttons on any scale, ON/OFF/Zero and Tare, were still kept as physical buttons on the Ohaus Scout STX.

You also have to consider that the fairly large screen needs a lot of power. The Scout STX can be used with four AA batteries, but those won’t last more than a few hours (6 according to Ohaus). It’s certainly a good idea to use the included power adapter whenever possible.

Links and further information

New Scales and Balances coming in 2014

A&D

A&D has confirmed that the SJ-WP series of compact bench scales is going on sale in Europe in the first quarter of 2014.

A&D SJ-30KWP Food Scale

To understand what’s so ingenious about this scale, you should know that until now, compact scales were either fast or they had a high degree of ingress protection. It was not possible to have both a very short stabilization time (<1s) and resistance to dust and liquids in a compact instrument. The reason for this is that the air pressure inside the housing of the scale changes when a load is applied (or removed). For accurate measurements, the air pressure inside and outside has to be equalized. Of course, this could be achieved by simply building a few holes into the housing, but then you would allow dust and liquids to enter. The conventional solution has been to use selectively permeable membranes which let air through and block water. However, air diffusion through these membranes takes time, slowing down the measurement process.

A&D’s new approach is remarkably simple and effective: By mounting the load cell outside of the housing, the SJ-WP scale achieves a stabilization time of 0.5s or less in combination with IP67 protection (dust tight and water proof up to 1m):

A&D SJ-WP externally mounted load cell

Fast, compact, resistant to harsh environments and easy to clean, A&D’s SJ-WP could be a game changer in the food industry.

You can already find further information on A&D’s website.

Adam Equipment

While I have no information on new products coming in 2014 yet, I was told that Adam is planning to add USB host functionality to a number of balances. This would allow weighing data to be written directly on a memory stick, greatly simplifying data logging and data transfer to a computer. This functionality is already available on Adam’s PMB moisture analyzer:

PMB Moisture Analyser

Kern

The first pages of the 2014 catalog show Kern’s continued focus on touchscreen scales. The new models include analytical and precision balances as well as platform scales. While Kern does not indicate who the ODM is, I’m pretty sure these devices are made by Radwag in Poland.

Kern Touchscreen Scales

A cooperation between the two companies would make sense: Kern’s strengths are sales and marketing, while Radwag is good at actually developing and manufacturing weighing instruments.

Further information will soon be available on Kern’s website.

Ohaus

The new Valor 2000 and 4000 are aimed at the food industry and are meant to improve productivity even in harsh environments. There are still some inconsistencies in the available documents but it appears that Ohaus is claiming a stabilization time of 0.5s with an IPX8 rating (no dust ingress protection; protected against submersion beyond 1m).

Ohaus Valor 4000 XW

If you’ve read this post from the very beginning, you might be wondering how Ohaus has been able to achieve this with a load cell that’s placed inside the housing. The answer is called “Flow-Through Design” and simply means that there are indeed some holes in the housing which allow air and liquids to enter and exit relatively unhindered. The electronic components are silicon sealed to protect them from fluids and condensation:

Ohaus Valor 4000 flow through design

I’m looking forward to comparing this approach with A&D’s external load cell solution.

Update March 2014: Ohaus has released a video featuring the new scales:

Smartlux (my company)

I want to take this opportunity to announce that our RS-232 communication software “232key” is going to be released this year:

Rs232 Software

Our software is designed to make it easier to transfer measurement values from any instrument with an RS-232 interface to any application which accepts keyboard input. It receives data from a scale, balance or other device via RS-232 (COM port), extracts the numeric value, formats it and “types” it into another program (“keyboard wedge”-functionality). I’ll announce the release on this blog.