Model 4200 is a UL recognized, low cost, top or bottom mounted, liquid level switch from Thomas Products Ltd., of Southington, Conn. This unit is constructed of polysulfone, an FDA approved plastic that is widely used throughout the food industry. The unit’s unique design incorporates a fluted stem to virtually eliminate deposit growth and provide higher clearances between the float to stem. Mountings are available in 1/8” NPT or 3/8”-16 straight thread with nut.