| Single-Point
Liquid Level Switches: available
in both standard and custom configurations |
| M
Series
Single-Point
Liquid Level Switches
Madison
Company offers a complete line of Standard
and Configured (slightly modified Standard
designs) models. These products continue to
meet the needs of applications in many markets,
at competitive prices. In addition, Madison
Company offers the capability to design specific
liquid level switches for OEM applications
that require unique considerations in materials,
configurations and system interfacing.
Engineered
designs incorporate more than 45 years of experience
in liquid level switch applications in a variety
of environments and
installation configurations. High reliability
of the magnetic reed switch technology assures
repeatability at an economical price. Our design
experience and flexible manufacturing techniques
also offer customers many value-added design
and assembly options to reduce their product
cost.
All
Madison Liquid Level Switches are also available
with temperature
sensing capability. See our
MT Series page for more information.
Click
here for information on Madison level switch
and sensor technology.
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| Materials
Available (click for standard
models and specifications): |
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| Special
Models (click for standard
models and specifications): |
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| Features: |
| • |
Single-point |
| • |
Magnetic
reed switch technology |
| • |
High
reliability |
| • |
Wide
selection of available materials |
| • |
Three
basic sizes: full, miniature and subminiature |
| • |
Direct
interface to controllers available |
| • |
Adjustable switch height feature is available for tank applications with slight changes in the level at which the switch signal is needed and to accommodate multiple tank designs or conditions |
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| Material
Selection Guide: |
| The
first consideration is the type of liquid,
temperature and pressure to which the switch
will be subjected. Madison manufactures liquid
level switches
in various styles, in a variety of materials,
to cover a broad range of conditions. Following
are some basic recommendations for selecting
the proper liquid level switch material for
your
application. |
See
Approvals reference page for info |
|
| Material |
Application |
| 316 Stainless Steel |
For
high-temperature (to 300°C), high-pressure
(to 300 PSIG) and corrosive conditions. Commonly
used in food processing, medical, heating and
cooling equipment. |
Polypropylene
Polysulfone
|
For
acidic conditions, such as found in electroplating
and metal cleaning. Another choice for lower-temperature
(to 105°C) food processing applications
(Madison Company uses only polypropylene that
is FDA-approved for food contact). Also a good
choice for general-purpose applications in
commercial or consumer appliances and equipment.
Available in white and other colors. |
Brass & Buna-N
PBT & Buna-N |
The
selection for petroleum-based liquids, such
as lubricating oils, gasoline and diesel fuels.
Widely used in storage tanks of vehicles, generators,
transmissions and hydraulic systems. Other
uses are in lubrication, recovery, refining
and fuel processing equipment.
Please note: PBT is not suitable for use in
water above 130°C. |
Kynar
PTFE
|
Chemical-
and solvent-resistant properties make this
material a problem solver for many applications.
Its high-purity nature is ideal for food handling
and sensitive laboratory or test equipment. |
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| Once
a suitable material has been selected, the type
of switch and configuration are the next considerations.
Madison Company stocks a full line of standard
products that can meet the requirements of many
applications. For specific designs, Madison can
custom-build, to order, switches with an infinite
number of variations and options. Please utilize
our M & MT
Series single-point specification sheet which,
when completed, will allow our engineering department
to better meet
your needs. |
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| Switch Operation (NO/NC): |
Each style switch is equipped with a means to identify which type of operation to which the switch is set.
Vertical: NO/NC operation is indicated by the position of the witness mark (stainless steel models) or magnets (plastic models). NO is indicated by circle up (stainless steel) or magnets down plastic); NC is indicated by circle down (stainless steel) or magnets up (plastic).
Horizontal: NO/NC operation is indicated by the direction of the arrow on the hex. NO is indicated by arrow up; NC is indicated by arrow down. An ohmmeter or continuity meter can be used to verify the switch setting and operation. Simply connect the meter to the leads and, with the float hanging down away from the fitting, measure the switch. If the meter reads a short, then the switch is normally closed and will open on rise.
All switches are shipped in the Normally Closed (NC) position, unless otherwise specified. To change the contact operation, simply remove the retaining ring and float and reverse the float on the stem. The only exception to this is the subminiature switch (M3326/M3326-NO), for which operation must be specified when ordered, since the float is not reversible on this switch.. |
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| All specifications are subject to change
without notice. |
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