Originally Posted by cpaharley2008
the Garnet SeeLevel gauges $100 with 3 sensors-they attach to tank exterior, no holes
Which specific model is this, Jim? "3 sensors" could mean three level points on one tank, but I think it is three tanks.
Originally Posted by tractors1
Externally attached tank sensors work by capacitance; when the level of stuff gets up to one of the sensors it turns on a light/led, so they're usually discrete levels (1/4.1/2/,3/4, and Full) that are displayed...
Usually, yes, but at least some of Garnet's products - such as the Model 709-A - SeeLeveL II
- have continuous strip sensors: the sensor runs the height of the tank (and can be trimmed shorter if required), and the system determines a continuous level (displayed in % full), not just three switch points.
(The product documentation also mentions propane
level - that one is not capacitance-based, it is driven by the resistor-type sensor on the float gauge of a typical built-in motorhome tank)