A flow switch assembly used in applications exposed to temperatures below freezing, including chiller applications, for mounting onto piping having liquid flowing therein, and having a low liquid cut-off switch assembly configured to provide ON/OFF-signaling in response to the liquid flowing in the piping, the low liquid cut-off switch assembly comprising: a two-part base assembly having a lower base part being configured to be adapted on the piping having the liquid flowing therein, immersed within the piping and subjected to conditions caused by the liquid flowing in the piping, and also configured with a central orifice to receive a paddle arm that pivots on an axis in response to the liquid flowing in the piping, the lower base part being made from a metallic material for responding to the conditions caused by the liquid flowing in the piping, including caustic chemicals flowing in the piping; and an upper base part being configured with a corresponding central orifice to receive the paddle arm, and configured with a channel to receive a pivot arm to mount and couple to the paddle arm with a pivot pin to pivot on the axis in order to actuate the low liquid cut-off switch assembly in response to the liquid flowing in the piping, the upper base part being made from a non-metallic material, the non-metallic material of the upper base part having a corresponding coefficient of heat transfer that is substantially lower than the coefficient of heat transfer of the metallic material of the lower base part that does not allow, or substantially reduces, transfer of cold temperature and negative heat so as to substantially reduce condensation build-up in the low liquid cut-off switch assembly. a two-part base assembly having a lower base part being configured to be adapted on the piping having the liquid flowing therein, immersed within the piping and subjected to conditions caused by the liquid flowing in the piping, and also configured with a central orifice to receive a paddle arm that pivots on an axis in response to the liquid flowing in the piping, the lower base part being made from a metallic material for responding to the conditions caused by the liquid flowing in the piping, including caustic chemicals flowing in the piping; and an upper base part being configured with a corresponding central orifice to receive the paddle arm, and configured with a channel to receive a pivot arm to mount and couple to the paddle arm with a pivot pin to pivot on the axis in order to actuate the low liquid cut-off switch assembly in response to the liquid flowing in the piping, the upper base part being made from a non-metallic material, a lower base part being configured to be adapted on the piping having the liquid flowing therein, immersed within the piping and subjected to conditions caused by the liquid flowing in the piping, and also configured with a central orifice to receive a paddle arm that pivots on an axis in response to the liquid flowing in the piping, the lower base part being made from a metallic material for responding to the conditions caused by the liquid flowing in the piping, including caustic chemicals flowing in the piping; and an upper base part being configured with a corresponding central orifice to receive the paddle arm, and configured with a channel to receive a pivot arm to mount and couple to the paddle arm with a pivot pin to pivot on the axis in order to actuate the low liquid cut-off switch assembly in response to the liquid flowing in the piping, the upper base part being made from a non-metallic material, the non-metallic material of the upper base part having a corresponding coefficient of heat transfer that is substantially lower than the coefficient of heat transfer of the metallic material of the lower base part that does not allow, or substantially reduces, transfer of cold temperature and negative heat so as to substantially reduce condensation build-up in the low liquid cut-off switch assembly.