TM 5-6350-275-24&P
SENSORS CHARACTERISTICS, CAPABILITIES, AND FEATURES (Cont'd)
Passive Infrared Motion Sensor(PIMS) - Highly sensitive to moving infrared sources while offering increased
immunity to radio frequency interference (RFI), vibration, static, stray light, rapid temperature changes, and other
false alarm sources. The PIMS is housed in a die-cast metal housing that mounts flat on a wall. Types of PIMS
include:
Volumetric - The detection pattern extends from 8 feet to 30 feet on boresight and at angles up to 60 degrees off
the boresight.
Curtain - The detection pattern extends from the sensor mounting level to the floor, to a minimum of 30 feet on
boresight, and at angles up to 3 degrees off of boresight. The maximum angle subtended by the sensor is
approximately 6 degrees.
Omni-directional - The detection pattern extends out to 30 feet from a point directly beneath the sensor and all
angles about a line through this point.
Passive Ultrasonic Sensor (PUS) - A penetration sensor that detects the ultrasonic energy generated by drills and
other intrusion tools during attempts to penetrate the perimeter. The PUS detects ultrasonic energy generated by
drills or other intrusion tools. The PUS will give output alarms when ultrasonic energy is present and if the sensor is
being tampered with. The PUS will give an alarm condition when SELFT+ and SELFT- are connected. This sensor
stimulus signal should come from a relay closure in the RADC. When this occurs, an audible tone and a 20 - 30 kHz
70db signal are generated in the PUS, and the PUS will activate its LED and alarm.
Radio Frequency Motion Sensor (RFMS) - Provides invisible volumetric microwave perimeter protection for a
distance of up to 1500 feet. The system consists of a separate transmitter and receiver operating off a 12 vdc
source. The RFMS can be mounted on a pole, 3.5 or 4.0 inches outside diameter. The RFMS can operate in and is
not affected by all types of environmental conditions; rain, snow, fog, and varying temperature changes. The system
can detect movement of less than 4 inches per second, has tamperproof circuitry that activates an alarm if case is
opened, and has 6 operating channels that are field selectable.
Ultrasonic Motion Sensor (UMS) - Emits ultrasonic waves into the area being protected. When these waves are
reflected by a moving intruder, their frequency changes. The sensor detects this change in frequency, which is
called a Doppler Shift, and initiates an alarm. The UMS is a transceiver consisting of transmitting and receiving
transducers. The system generates a
continuous 26.3 kHz signal which the transducers converts into sound energy in the ultrasonic range. The sensor
detects any change in frequency and generates an alarm. The UMS can be mounted on walls, posts, and ceilings.
For the best coverage, the sensor should not be mounted higher then 12 feet from the floor. The UMS has a tamper
proof switch which generates an alarm if the cover is removed.
Vibration Sensor (VS) - Provides intrusion detection for all types of solid structures such as vaults, safes, and storage
cabinets. The system allows for movement around the area without the risk of creating unwanted alarms. The VS
detects structural vibration for all types of solid structures (free-standing or built-in), such as vaults, safes and storage
cabinets. It senses vibrations that occur within a 3 to 45 foot radius of where the sensor is mounted. The VS uses a
piezoelectric sensor to detect these vibrations and converts these vibrations into electrical signals and generates an
alarm. The VS uses three analyzing channels to differentiate between random environmental disturbances and an
actual intruder.
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