Syrup Temperature Probe
This is the same probe which comes included with the Smoky Lake Maple Products auto draw-off systems. It is used to sense the temperature of the syrup which is nearest the draw-off of your syrup pan. The probe sends temperature information to your auto draw-off command center so that it knows when to open or close the automated draw-off valve. The temperature information from the syrup probe also tells the command center when to sound the built-in safety siren.
The Smoky Lake Auto Draw-Off Systems are reliable units. That being said, if a syrup probe were to fail, it is really nice to have a backup on hand. That way you can continue boiling without needing to wait for a replacement.