The LK 160 SmartBio is an electronic differential temperature
controller for use with pellet boilers charging thermal stores.
The controller comes with 3 x 4 meter sensors, these measure the
temperature in the top and bottom of the thermal store and in the
pellet boiler itself.
When the top of the tank falls below its set temperature this
triggers a relay inside the controller to turn the pellet boiler
on. Only when the bottom sensor has reached its target temperature
will the pellet boiler turn off. The use of two sensors in the tank
make the boiler stay on for longer and also what's more important is
that the boiler stays off for longer. This stops any short cycling
and increases the efficiency and lifespan of the boiler and its
parts.