HTLP 100 mm Dia Counting Plate Digital Colony Counter HTLP-085

The HTLP-085 is an amazing little counter. It's just the right size to sit on a desk or table and takes up very little space, but it can still count up to 999. The numbers are large and easy to read, even from far away. It's perfect for people with vision problems or a hand tremor who have difficulty reading smaller displays. The display also has a backlight that lights up the digits for easier viewing in dim lighting conditions.

The surface of the display can be rotated 90 degrees, so it can be mounted on its side or vertically if you prefer. This is nice if you want both an accurate count and a more compact setup, if you want to use it in an art museum as part of an exhibit, where you might only need it to display a few tens of thousands to fit within the context of the piece. It also has a button that lets you switch between displaying the current number and a total number of items counted.

The device comes with an 8-inch, two-conductor cable with terminals at one end and a connector at the other end. This makes it easy to connect to any microcontroller or other system that requires TTL logic levels or only two conductors. The device needs only +5V to function, so it works well even with a 3V system like Arduino or Raspberry Pi, making this a good choice for hobbyists who don't yet have their own regulated 5V power supply.