I installed a couple of the KUS liquid sensors. 240 - 30 ohm. At 240 ohm, it shows empty, at 145 ohms still shows empty, at 140 it shows 45% full and works great from there too full. I can see the resistance going down as liquid is added to the tank but the touch 50 shows zero until 45%. Based on the crappy RV sensors, I show 1/3 full at the same time. When the touch 50 shows 65 - 70 %, the stock RV sensor goes to 2/3. If I adjust the empty resistance to 250 ohm, the touch 50 screen shows 7% but it sits there until 45%. Does this on 2 different sensors. Any ideas?