24 alarm for sale, brand-new and used.

System Sensor D4120 4 Wire Photoelectric Low-Flow Duct Smoke Detector The SYSTEM-SENSOR-D4120 4-wire photoelectric, low-flow, duct smoke detector senses smoke in the most challenging conditions, operating in airflow speeds of 100 to 4,000 feet per minute, temperatures of -4 degrees F to 158 degrees F, and a humidity range of 0 to 95 percent (non-condensing). A plug-in sensor head offers improved false alarm immunity and simple installation, testing, and maintenance.

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+24V Smoke Detector Model-OSD243

+24V Smoke Detector

Viking J-1 Alarm Valve Sprinkler Fire Water Clapper Reverse Flow Pipe 3" 08237 The Viking Model J-1 Alarm Check Valve serves as a check valve by trapping pressurized water above the clapper and preventing reverse flow from sprinkler piping. The valve is designed to initiate an alarm during a sustained flow of water (such as the flow required by an open sprinkler) by operating an optional water motor alarm and/or alarm pressure switch. LAST ONE!!!!

1. Carbon monoxide monitor and alarm. Four-digit liquid crystal display indicates the carbon monoxide concentration.

Carried everywhere your keys go, NukAlert's 24/7 constant radiation monitoring, alerts you if you are being exposed to dangerous levels of radiation. the NukAlert is a compact key chain attachable radiation Monitor & alarm. Monitoring is always on, using a built in long-life (ten+ year) battery.

i000000 Hand-held Mini Portable Precision Formaldehyde Monitor / Multi AIR Detector

More than just a radiation detector, the NukAlert™ is a patented personal radiation meter, monitor and alarm. Small enough to attach to a key chain, the device operates non-stop, 24/7 and will promptly warn you of the presence of unseen, but acutely dangerous levels of radiation. Used nationwide by federal, state and local first responders, law enforcement and the Dept.

More than just a radiation detector, the NukAlert™ is a patented personal radiation meter, monitor and alarm. Small enough to attach to a key chain, the device operates non-stop, 24/7 and will promptly warn you of the presence of unseen, but acutely dangerous levels of radiation. Used nationwide by federal, state and local first responders, law enforcement and the Dept.

American Magnetics Model 186 Liquid Level Controller . . Item Description: The Model 186 Liquid Level Controller (cryogen monitor)

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Traceable Platinum Hi-Accuracy Thermometers Traceable Platinum Hi-Accuracy Freezer Thermometers are built with patent-pending technology and operate in temperatures of -100°C to 200°C. Easy-to-read, 3-line display with 2 alarm LEDs. Handle and Bullet™ fast-response probes are constructed of stainless steel.