This was how we clocked in and out for our shifts at my first job. I still find the process of clocking in and out an insult to our dignity.

I installed these in my distribution center when payroll modernized from old punch cards for the hourly laborers. Our versions were fully loaded with Ethernet and a rechargeable backup battery pack for power outages. Neat to see the guts after all these years later.

My warehouse job in 2015 used this as a time clock.

Yeah I had to install these at the company I used to work for. They were used as timeclocks, I don't remember if we were using ADP or Paychex for payroll at the time. We just connected them to ethernet and hosted an app on one of our servers that handled communication between the unit and the payroll service. They had an optional NiCad battery pack and power board that went in the back as a battery backup. We had to RMA them on a fairly regular basis as they would just stop reading peoples hands correctly.

I worked in a datacenter, we used those all over the building for door access. Someone accidentally dumped a cup of coffee into one in the office area and took out access for most of the building

I worked in a factory paid by the hour. I would go out for lunch at 12:00 and punch out using this device. I would sometimes punch back in at 12:31 and they would take 15 minutes off my pay. Companies probably saved a lot of money with these devices.

That anti-temper can is quite interesting, never seen those before ! The anti-temper mechanisms I saw were mostly either light or magnet based

Pretty funky to see a DC barrel jack mounted this way pointing "inside" the machine :)

I used to work at a doctor's office that used one of these as a time clock. That doctor didn't trust anyone. His office had a full-fledged apartment with garage and everything in one wing too, kind of weird. Why would you live in a doctor's office?

My bank used these for accessing the room containing the safe deposit boxes. Until they went broke and got themselves bought out. That blown fuse may have been intentional, when it was decommissioned by hitting it with 120VAC?

This was very interesting, enjoyed the video and the Hula Hoop demonstration. How did you acquire this peace of inventory? Did this unit send a message to another box to unlock a door?

Oh, I've seen one of those in a datacenter a decade ago. AFAIK its recognition failed a lot.

While on the "internship" for the studies in my university, they just gave me this device and asked to search on the web for some various info about it, and that's how I got here :p. Any idea if you can extract the image of the hand or some measurments from it?