The key to the Project

A project log for Bee hive health monitor

This project will monitor the weight changes in the hive along with some environmental items to provide real time indicators of hive health

sparks.ronsparks.ron 08/15/2019 at 23:200 Comments

The first step of this project is the selection of a suitable scale or load cell platform. You can certainly make your own for less money than buying one and modifying it. If you have a 3d printer and wood, plastic, or metalworking ability, then if you have the time and interest by all means make one. You can get inexpensive load cells from the usual vendors and mechanically all you need to do is create a platform that is fully supported by one side of the load cell and a base that is the support underneath it. We decided that our time was more useful in building the rest of the system than reinventing a platform system that someone else had engineered and manufactured.

Either way, here are the key items we felt were important  to have in the mechanical system:

Here is a picture from an Amazon listing for a scale like the ones we are using:

Notice that it has no edges or seams in the stainless steel platform. It is a press fit to the plastic base and covers it well enough to protect it from most UV. It also separates any plastic away from the hive bottom and leaves a fully ventilated area underneath. On this unit, the bottom was very nearly sealed with the load cell feet in protected recesses. After one year outside we have seen no degradation in our to test units.

You can see from the pictures that we use a couple of different methods of supporting the scale and then fitting the hive to the top of it. One important facet of the hive mount is that it does not sit tightly down on the scale. This is to allow air to move freely below the hive and above the scale. One of us uses screen bottom hives and this arrangement also allows a very quick check for Varroa Mites. This invasive pest is wreaking havoc on hives all over the US.

Once you have your mechanical arrangement (scale) and hive mounting system, you can then proceed with the electronic part. More on that in the next log.