Alright. I got the first two adapters. In spite of the fact that their product pages clearly showed adapters that looked, at least superficially, different, they both look exactly the same, and their IDs are identical. When I first installed them, they showed up as barcode scanners. Throughout my use of them in testing a few keyboards, I don't know when, they relabeled themselves as keyboards.
Maybe yours is different, but I'm thinking it is the same, as it looks exactly the same externally. As I had suspected, at least with mine, the vendor and product IDs return a result for not only a keyboard, but also a barcode reader. I imagine the controller is basically identical in both:
http://the-sz.com/products/usbid/index.php?v=0x13ba&p=0x0018&n=Unfortunately for me, neither of these adapters works reliably with my Z-150, but they work with more normal ps/2 standard keyboards just fine. The hunt continues tomorrow.
I'm still curious to see whether or not the keyboard is just switched to the wrong setting.
The packaging looks almost identical. They didn't even bother to change the description on the back, and it looks like they changed the background layer of the stolen Google images and their toddler doodle adapter. Great names too. This Techno tech adapter's going to work great with my keyboard board.