While they are much better than the el cheapo sensors, because they work via capacitive coupling thru the sidewall, it is still important to keep the black tank as clean as possible. Also with just a single wire for all the gauges, mine developed a problem and would decode the wrong sensor and I would have to push a button multiple times to read the correct tank.
Larry Day, Texas Baptist Men volunteer
'13 Silverado LT 3500HD D/A CCSB 2wd, custom RKI bed
'11 Crossroads Cruiser 32MK loaded