WL/WLM
Selection Guide
With the WL Series, OMRON will combine the switch, Actuator, and wiring method required to build the ideal switch for
your application.
The WL Series consists of four basic types: General-purpose, En-
vironment-resistant, Spatter-prevention, and Long-life Switches.
WLCA2 Switches can be used for the most common applications.
According to Operating Environment
Environment
Key specifications
Models
−10°C
+80°C
WL@
General-purpose
Switches
Long-life Switches
Normal
WLM@
Water-resistant to IP67.
+120°C
+5°C
WL@-TH
WL@-TC
Heat-resistant
Switches *1
High-temperature
Low-temperature
To increase heat resistance, the rubber material (silicon rubber)
and the material of the built-in switch have been changed.
−40°C
+40°C
Low-temperature
Switches *1
To increase resistance to cold, silicon rubber and other
measures are used.
Rubber parts are made from silicone rubber, which has a
high-tolerance to deterioration over time and changes in temperature.
Rollers are made of stainless steel to improve corrosion resistance.
Exposed nuts and screws are made of stainless steel.
WL@-P1
WL@-RP
Weather-proof
Switches *1
Outdoors
Corrosion-proof aluminum diecast has been used for the
housing, fluorine rubber has been used for rubber parts, and
stainless steel has been used for screws and nuts (except for
actuator) to increase resistance to oils, chemicals, and weather.
Corrosion-proof
Switches *1
Chemicals and oil
Water drops and mist
Uses an airtight built-in switch.
WL@-55
Airtight Switches *1
Cables attached. Uses a general-purpose built-in switch.
The case cover and conduit opening are molded from epoxy
resin to increase the seal. The cover cannot be removed.
WL@-139
Hermetic, Molded-terminal
Switches *1, *2
Cables attached. Uses an airtight built-in switch.
The case cover and box interior are molded from epoxy resin to
increase the seal. The cover cannot be removed.
The SC connector can be removed, so it is possible to use
flexible conduits for the cable.
WL@-RP40
Hermetic, Molded-terminal
Switches *1, *2
Constant water
drops and mist
Cables attached. Uses an airtight built-in switch.
The cover screws, case cover, box interior, and conduit opening
are molded from epoxy resin to increase the seal.
(The cover cannot be removed.)
WL@-140
Hermetic, Molded-terminal
Switches *1, *2
Cables attached. Uses an airtight built-in switch.
The cover screws, case cover, box interior, conduit opening, box
head, and head screws are molded from epoxy resin to increase
the seal. (The cover cannot be removed.)
The Head opening is protected from cutting powder.
-141: The Head section is molded from epoxy resin;
Head direction cannot be changed.
WL@-141, -145
Hermetic, Molded-terminal
Switches *1, *2
(Only the WLCA2, WLG2, WLGCA2,
and WLH2 can be produced.)
Constant water
drops or splattering
cutting powder
-145: The Head section is molded from epoxy resin;
Head can be in any of 4 directions.
Cables attached. Uses an airtight built-in switch.
WL@-RP60
Hermetic, Molded-terminal
Switches *1, *2
The case cover, box interior, conduit opening, and head screws
are molded from epoxy resin to increase the seal. (The cover
cannot be removed.) Rubber parts are made from fluorine rubber
to increase resistance to coolant.
Coolant
To prevent spatter during welding, a heat-resistant resin is used
for the indicator cover and screws and rollers are all made from
stainless steel.
Spattering from
welding
WL@-S
Spatter-prevention
Switches
*1. Not all functions can be combined with environment-resistant switches. Refer to the applicable models on the previous page.
*2. Refer to page 25 for information on the construction of Hermetic Switches.
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OMRON [ OMRON ELECTRONICS LLC ]
