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.       18.0 mm
Material                       BUNA
Max. current                0.5A

Temperature rating        350ºF
S.G                                 0.85
Outside Diameter          17.6 mm
Material                          PTFE
Power                            10W
Max. switching current   0.5A
Max. carry current         1.0A
Max. switching V           100VDC

Temp. rating              300ºF
S.G                            0.73
Outside Diameter      22.8 mm
Material                     316SS
Power                        50W
Max. carry current     1A
Max. switching V       265VDC

Temperature rating     200ºF
S.G                             0.55
Outside Diameter      16.2 mm
Material                      foamed PP
Power                         50W
Max V                         220VDC

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