Product Overview

PRODUCT DATA
Leviton Mfg. Co., Inc. Lighting & Energy Solutions
201 N. Service Rd. Melville, NY 11747-3138 Tech Line: 1-800-824-3005 Fax: [phone] www.leviton.com/les
© 2011 Leviton Manufacturing Co., Inc. All rights reserved. Subject to change without notice.
OSSMT
Decora
®
Wall Switch Multi-Technology
Occupancy Sensor
OSSMT-MD/GD
BASIC OPERATION
Occupancy sensors have two tasks: keeping the lights
ON while the space is occupied and turning the lights
OFF when unoccupied.
The PIR sensors provide immunity to false ON through
a specialized Fresnel lens which divides the field-of-
view into sensor zones. When a person passes into or
out of a sensor zone, the sensor detects motion and
switches the lights ON.
The Ultrasonic (U/S) sensors provide maximum sen-
sitivity and range in difficult spaces with irregular
shaped rooms and partitions that can block the PIR
field-of-view. A pair of U/S sensors will detect Doppler
shifts caused by motion in a space preventing false
OFF. These sensors are more sensitive to small move-
ments since they do not rely on zones.
APPLICATIONS
Leviton’s OSSMT Multi-Technology Decora Wall Switch
Occupancy Sensor is used to provide automatic light-
ing control for energy savings and convenience in a
variety of commercial applications:
• Retrofit
• Private and executive offices
• Conference rooms
• Storage areas
• Restrooms
• Classrooms
• Lounges
• Training areas
• Multi-location switching (similar to 3-way)
SELF-ADAPTIVE TECHNOLOGY
Designed for “install and forget” use, the OSSMT
automatically analyzes room conditions and adapts to
errors or changing environment.
HOW THE OSSMT-MD AUTOMATICALLY ADAPTS
CONDITION EXAMPLE ADAPTIVE REACTION
False-ON:
Sensor
incorrectly
turns the
lights ON.
False-OFF:
Sensor
incorrectly
turns the
lights OFF.
After an initial movement
is sensed, if another
movement is not sensed
within the timer setting the
delayed off-time setting is
automatically reduced.
If motion is detected short-
ly after the lights go OFF,
the current delayed off-
time setting is increased.
The sensor detects
movement in the
corridor or hallway
and the room light
turns ON.
The sensor does
not detect move-
ment because an
occupant is virtu-
ally motionless and
the lights turn OFF.