Review on Maxmoral Inductance Controller Horizontal Hydroponics by Sarah Richards

I used a pair of these level switches in series (for redundancy) in the system to keep my carp pond filled. I ended up using current through these switches to activate a small relay as the (presumably reed) switches were not powerful enough to handle the current needed to power a pair of solenoid operated irrigation valves. They worked fine, but I don't have much time for them yet. If they last more than a year I will try to remember to upgrade this rating to 5 stars.