Tank Gauge - Premium Tank-Top Water Level Monitor for Rainwater Harvesting Systems - Ideal for Home, Farm, and Outdoor Water Storage

We took a risk and tried this device which we certainly do not regret. There are many bad review complaining about the guts springing out and after installing this unit, I can understand how this happens.Was easily to install, easy to calibrate, works great for our needs! This is much like setting an old manual clock!What you need to know about the face cover being difficult. The plastic cover is quite right, thin and feels like it may be a bit brittle. It has a small rubber gasket around it just under the outer lip and tiny latching grooves that hold it on well. *What you need to be careful with is don't be too rough and manly when taking the cover off. It can be temperamental but was just fine for us.It was simply to hold up beside the drums and note the position of empty and full from the small black needle that swings back and forth. It was not difficult to carefully move the green (full) and red (empty) hands around either.We installed in the center of a bung plug to make removal, cleaning, replacement or work effortless by simply unscrewing the plug. Works great!