Haven't seen that one, but it appears that it would not work for me. I would like to measure over a range of 10 to 20 ft at a starting depth of 120ft +- a few feet. It is not clear that I could cut the sensor cable and add a hundred feet of two-conductor extension...Have you taken a look at this link?
Maybe it's been suggested before, but I'd use a gauge/differential digital pressure sensor with a range of around 15 psi (20 feet of water will give you a little less than 9 PSI) connected to a hose. I'd lower the hose all the way down to the lowest point you wish to measure, and then I'd pump some air into the hose, so as to let all the water out of it. Afterwards, I'd just measure the pressure and convert it to feet of water... I've done that before in a different project using one of these sensors. It's simple to read, and also easy to display the info on an LCD using an 8051 micro controller. The sensor's a little expensive, but it's highly reliable and you'd end up with very few components.Haven't seen that one, but it appears that it would not work for me. I would like to measure over a range of 10 to 20 ft at a starting depth of 120ft +- a few feet. It is not clear that I could cut the sensor cable and add a hundred feet of two-conductor extension...