DIY magnetic Kalk stirrer
Magnetic stirrers are one of the simplest ways to build a DIY Kalk stirrer. I used an old reactor with a missing lid for the tube. You could also just use PVC or an acrylic tube. For the used a hole saw and made a hole in the centre of a square of acrylic and bonded it to the tube. I sandwiches some rubber beteeeen a second price and drilled holes for nylon wing nuts The rubber in the middle seals the lid
The base is a square of acrylic to hold a 120mm PC fan. I did have to shave a few mm off the side of the fan to make it fit. I glued a rare earth magnet to the centr of the fan and aligned it a few mm below the top of the frame to ensure it can spin freely
Inside the reactor be sure to put a piece of glass on the bottom to prevent the internal stir bar from wearing through the acrylic over time
