All our float switches are designed to fit into drum openings and smaller.  This page is a comparison of the technical specifications of the float switches we use.
BUNA float switch
BUNA FLOAT
miniature Teflon float switch
PTFE FLOAT
SS float switch
STAINLESS STEEL
PP float switch
POLYPROPYLENE

BUNA rubber float switch on a 316SS stem.  This is a very hard rubber with no flexibility – more like a resin.  Stainless steel stem and retaining E-clip.

Generally suitable for organic solvents/oils/fuels. See chemical resistance chart for more info.

PTFE float switch on a PTFE stem.  is a hollow construction with a ring magnet sealed with PTFE.   PTFE retaining clip.

Impervious to almost any chemical. See chemical resistance chart for more info.

Hollow stainless steel is generally suitable for organic solvents, fuels, oils.  Retaining ring is 15-7 stainless steel.

Generally suitable for organic solvents/oils/fuels. See chemical resistance chart for more info.

PP float is our smallest float switch.  that must fit in a 3/4″ NPT bung. Retaining peg is PP.  Uses two pin-shaped magnets are pin shaped that are sealed with PP.  This is all PP with no exposed epoxy sealant.

Generally suitable for acids and caustics and many more. See chemical resistance chart for more info.

Temperature rating….. 200ºF
S.G…………………………… 0.55
Outside Diameter……. 18.00 mm
Material………………….. BUNA rubber

Temperature rating….. 350ºF
S.G…………………………… 0.85
Outside Diameter……. 17.61 mm
Material………………….. PTFE

Temp. rating………….. 300ºF
S.G…………………………. 0.73
Outside Diameter…… 22.75 mm
Material…………………. 316SS float cylinder, 18-8 hex nut

Temperature rating….. 200ºF
S.G…………………………… 0.55
Outside Diameter……. 16.23 mm
Material…………………..foamed PP

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