MICRO SWITCH™
Hazardous Area Switches
LSX Series
Datasheet
MICRO SWITCH™ LSX Series
Hazardous Area Limit Switches
MICRO SWITCH™ LSX hazardous area switches are designed for use in adverse environments. They are approved for use in
hazardous locations and NEMA classified atmospheres because their rugged housings have integral flame paths. These flame
paths force internal expanding gases to cool below external atmosphere ignition temperatures before they leave the housing. The
LSX also features tracking interchangeability with MICRO SWITCH™ BX Series Hazardous Area switches. An optional mounting
plate provides the same tracking and mounting as the standard HDLS Series (heavy-duty limit switch).
The majority of HDLS operating heads and circuitry options are available for the LSX Series. The rotary actuated LSX series
products are designed for use with levers that have non-sparking actuators due to the potentially hazardous environment. The
other styles of LSX Series switches which are the plunger actuated and wobble actuated products incorporate an integral non-
sparking actuator.
What makes our switches better?
Industry-leading breadth of product
Weather sealed to NEMA 1, 3, 4, 6, 13
Explosion proof to NEMA 7 (Class 1, Division 1 & 2, Groups B, C, D),
NEMA 9 (Class 2, Division 1 & 2, Groups E, F, G)
Extensive variety of actuation heads and multiple non-sparking
actuators
All metal drive train that offers consistent operating characteristics
through a broad temperature range. Also lasts longer (without need
for frequent adjustment) than drive trains with plastic parts
SAFE • RELIABLE
EXPLOSION PROOF • WEATHER SEALED
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Features
and Benefits
DESIGN FLEXIBILITY
MICRO SWITCH™ LSX limit switches’ field adjustability (CW-CCW operation,
rotatable operating head) assists in matching the switch to the application.
Available with momentary, maintained, sequential, or center neutral action.
All-metal drive train for consistent operation
UNIQUE DESIGN FEATURES
The head design is keyed for more
secure head-to-body retention
with the
head indexable in any one of four positions 90° apart. Captive mounting screws in
the heads help prevent the loss of screws during replacement or repositioning of
the head. Self-lifting pressure plate terminals
save wiring time.
Industry-leading breadth of products
WITHSTANDS MANY CAUSTIC ENVIRONMENTS
A die-cast zinc head
and aluminum body make the LSX suitable for indoor and
outdoor applications. A
diaphragm seal
between the head and body is designed
to provide an extra measure of protection. Switches remain functional when
exposed to many severe environments and caustic chemicals.
OPTIONAL SEALS
Standard seals are suitable for most applications, but
optional fluorocarbon
or fluorosilicone seals
are available for many harsh chemical, high or low
temperature environments.
DESIGNED TO CONTROL LOW-VOLTAGE DC APPLICATIONS
Hazardous area switches are available with a choice of
silver or gold-plated
contacts
to handle a variety of electrical load requirements from low energy to
power-duty control.
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Potential Applications
GRAIN ELEVATORS
Monitors plugged grain conveyors, slide gate position, diverter valves, and leg
positions
CONTROL VALVES AND ACTUATORS
Senses the “on” or “off” position of the valve
ON-SHORE DRILLING
Detects end of travel positions for extend and retract operations of drilling
equipment
PIPELINES
Monitors pig position and resulting pipeline health
PETROCHEMICAL AND CHEMICAL PLANTS
Monitors the position of control valves, doors, and gates
WATER TREATMENT PLANTS
Detects control valve position
PAINT BOOTHS
Door interlocks for sliding or hinged gates or doors
HAZARDOUS WASTE HANDLING
Often used as a valve position monitor
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MICRO SWITCH™ Hazardous Area Limit Switches
Figure 1. MICRO SWITCH™ LSX SERIES FEATURES AND OPTIONS
Sintered, bronze bearings
enable longer operating life
and increase resistance in
corrosive environments
Field adjustability
of operating head matches
switch to application
Boss-and-socket
head design for more secure
head-to-body retention
Dual bearings deliver
enhanced mechanical life
Twin shaft seals for improved
environmental protection.
Optional fluorosilicone seals
extend operating temperature
down to -40 °C [-40°F]
Rugged zinc head
and aluminum body
are phosphate treated
and epoxy coated
Two flame paths:
one in the cover-housing
threads; another between
the switch cavity and head
0.5 in or 0.75 in
conduit options
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