The Dwyer TSWB-010 Digital Temperature/Water Level Switch offers complete boiler control for outdoor wood boilers and other similar heating equipment. Product Applications: Wood or pellet boilers. The TSWB-010 Digital Temperature Switch has a high and a low set point for controlling the water temperature. The low set point can either be manually or automatically reset. This control also has a conductivity probe input. This input supplies12 VAC to the probe to check for low water condition. There are three relay outputs which can be assigned in the field to the high temperature set point, low temperature set point or the low water level input. The Model TS2-K configuration key can make configuring multiple controls quick and easy.