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2D51 duct smoke detectors are low-profile photoelectric detectors designed for special applications, specifically for use in no-flow or low-flow air-handling systems (0 to 4,000 fpm). Pendant or plenum mounted 2D51 detectors are intended to be installed into B210LP bases and wired to a D4P120 power board only control units. D4P120 power boards are capable of controlling up to two 2D51 sensors. Pendant mounted in a standard electrical boxes within ducts, the twist-in/twist-out heads allows easy removal from bases for quick cleaning and maintenance. 2D51 heads can be locally tested using a magnet or by using the test/reset pushbutton on the D4P120 power board.

Remote annunciators are designed for both conventional and intelligent applications. Their red LED provides visual indication of an alarm condition.

OSI-R-SS is a 4-wire conventional reflector-type linear optical beam smoke detector for use in fire alarm systems. The beam operates primarily on the principle of light obscuration using an infrared beam. Optical beam smoke detectors are uniquely suited to protecting buildings with large open areas with high ceilings such as a warehouse or atrium. The OSI-R-SS detector is a combined transmitter/receiver unit that can be directly connected to a conventional detector circuit.

The DST family of sampling tubes are pieces of steel piping with a series of holes drilled the entire length of the tube and should extend the entire width of the duct. The correct length has to be chosen for width of the duct where it will be installed. The sampling tube length must extend at least 5/8 across the duct width for optimal performance. The sampling tube is always installed with the air inlet holes facing into the air flow. The tubes lock securely into place and can be removed by releasing the front or rear locking tab.

The DST family of sampling tubes are pieces of steel piping with a series of holes drilled the entire length of the tube and should extend the entire width of the duct. The correct length has to be chosen for width of the duct where it will be installed. The sampling tube length must extend at least 5/8 across the duct width for optimal performance. The sampling tube is always installed with the air inlet holes facing into the air flow. The tubes lock securely into place and can be removed by releasing the front or rear locking tab.

System Sensor L-Series and L-Series with LED platform offers the most versatile and easy-to-use line of Speakers and Speaker Strobes in the industry with lower current draw and modern aesthetics.
Flexible design options meet virtually any application requirement: wall or ceiling mount, red or white color choices, bezel kits for alternate markings and languages, and LED color lenses for distinctive visual signaling. In addition, installers can easily adapt devices using field selectable candela, using rotary switches.

The System Sensor L-Series P2WLED-P 2-wire horn strobes are rich with features that increase application versatility, simplify installation, and maximize profits with lower current draw and modern aesthetics. LED lighting technology offers significantly lower current draw compared to older Xenon bulbs across a full candela range. This improves design flexibility for notification appliance circuits (NACs) while also reducing power supply requirements, allowing for simpler and lower-cost installations.
In addition, the System Sensor L-Series with LED notification appliances offer a new diagnostic test point feature that allows you to measure device voltage with a digital voltage meter (DVM) without removing the appliance from the wall or ceiling. The DVM test points are discreetly located on the face of the notification appliance, which enables faster troubleshooting and end-of-line (EOL) voltage checks while greatly reducing the risk of misplacing or damaging appliances during troublesh