FS 90 & FS 96 Floats
Although the FS 90 and FS 96 are physically similar there is one significant difference. The FS 90 contains a mechanical switch (i.e. it is non-mercury) while the FS 96 contains a mercury switch. The FS 90 and FS 96 each contain Form-C contacts (i.e. both the Normally-Open and a Normally-Closed switch are provided). The FS 90 & FS 96 floats and their associated mounting hardware are fabricated from Type 316 stainless steel.