Crossfire Alarms

Crossfire Alarms was founded in 1971. Crossfire Alarms prides itself on offering the most advanced and accurate smoke, heat and carbon monoxide detectors on the market. Crossfire Alarms is known best for offering an interconnected alarm system that utilizes advanced dual differentiation technology to alert people faster.



Crossfire Alarm’s biggest claim to fame: The Interconnected System

Most smoke and carbon monoxide alarms on the market are independent single-station detectors. Independent alarms are often effective in warning of danger in any given room, but are unable to warn people in rooms other than the one the danger is occurring in. Crossfire Alarm’s interconnected system alerts every room in the house of potential danger. These alarms work on a wireless network that sets off every alarm when another goes off.

Crossfire’s Interconnected Alarms use an Event Positioning System, or EPS, to help pinpoint the device that initially set off the alarms. If a threat originates in a room away from where any persons are located, it activates the alarm in each room. The proprietary Even Positioning System also allows people to silence all alarms in the home except the one where the threat originates. Knowing where the threat allows people to properly identify which areas of the home to potentially avoid during escape.

Advanced technology, such as Crossfire Alarms interconnected smoke, heat, and CO alarms, are designed to have different warning sounds for different threats. Crossfire alarms are designed to set off a three-pulse alarm on every alarm in the event of a fire, and a four-pulse alarm in the event of carbon monoxide. In addition, the LED lights on the alarms identify the cause for the alarm. This helps identify the threat facing a home by giving as much information as possible in the event of a threat.

Advanced Technology

The majority of smoke alarms on the market use ionization technology. When a fire breaks out, it produces electrically charged, or ionized, particles. These particles in the air float into the smoke detector’s ionization chamber. In the ionization chamber are two plates at opposite sides with a voltage across them, and a small amount of the radioactive element americium-241. The americium-241 generates alpha particles in the chamber that “ionize” oxygen and nitrogen. This causes a small electrical current in the chamber that the detector recognizes as normal. When ionized smoke particles enter the chamber, they attract ions in the chamber and disrupt the electrical current. When this happens, the horn sounds. However, ionization alarms have been proven inaccurate in many ways. For one, ionization alarms have a habit of giving off false alarms when a little bit of smoke goes directly into the ionization chamber. Secondly, studies of fatal house fires have shown that at least 25% of the time smoke alarms in the home did not go off.

Crossfire Alarms use Optical Smoke Detection, Rate-of-Rise, and Heat Sensor technology to provide a more accurate reading of danger in a home. Optical smoke detection is effective in sensing smoldering fires because they can sense even the smallest amount of smoke particles in a room. When anything disrupts the light between the LED and the photo-detector, the alarm should sound. These kinds of alarms are commonly used in hotels, hospitals and government buildings. They are known to have less false alarms and these types of commercial buildings do not enjoy false alarms and unnecessary evacuations.

Crossfire Alarms use an optical chamber designed with a removable labyrinth. This design allows the screen and the LED to be accessed for cleaning. The proprietary design also allows smoke to enter the sensing chamber from the typical horizontal direction as well as a new improved vertical smoke flow. This ensures that smoke enters the chamber faster, so the LED can detect the fire faster. After all, the whole process should be about time. The Crossfire Smoke alarm is set at 2.0% obscuration level. This allows the alarm to determine if the amount of smoke it is exposed to is life threatening. This reduces the chance of nuisance alarms, which no homeowner wants.

Crossfire Alarms Rate-of-Rise

Rate-of-Rise technology measures how quickly the temperature increases in a given period of time. These work when the temperature of a room increases at a rate equal to or faster than the set points established for the device by the manufacturer. These alarms are most commonly set to go off when the temperature increases at a rate of 12°F -15°F per minute. Rate-of-Rise alarms have two heat-sensitive thermocouples, or temperature-measuring devices. One side measures the heat transferred, while the other measures the overall temperature of a room. When the first thermocouple increases in relation to the other, the alarm sounds. Rate-of-rise alarms can detect fires at lower temperatures than most other types of alarms.

Crossfire Alarms couples their smoke alarms with heat detectors. Heat alarms are designed to go in rooms where smoke alarms are not allowed, including laundry rooms, garages, sheds, attics and utility rooms. Crossfire Alarms uses heat alarms that function with dual differentiation technology that combines rate-of-rise technology with fixed temperature.

Fixed Temperature heat detectors go off when the temperature of a room increases to a predetermined point. In many of these alarms, there is a chamber with a heat sensitive alloy that is designed to go from a solid to a liquid once it reaches a certain temperature, setting off the alarm. These alarms are designed with thermal lag, so the heat detector does not go off too early and waits until the surrounding air exceeds that temperature. Another method of fixed temperature is a thermistor. When the thermistor is measuring the fixed temperature and feeding the information to a microprocessor, smart technology can be utilized to determine when the alarm should sound. When it comes to a fire alarm, reliability is invaluable. Crossfire Alarms use this reliability for areas that smoke alarms cannot be installed.

In addition to its smoke and heat alarms, Crossfire Alarms creates effective carbon monoxide alarms. Carbon monoxide, often called the “silent killer,” is odorless, tasteless and invisible, and can be released at any time without warning. Carbon Monoxide detectors measure CO levels over time and set off an alarm when those levels reach a dangerous level in a home.

Crossfire Alarms Electro-chemical CO Detectors

Electro-chemical CO detectors use changes in electricity to sense changes in CO levels, similar to semiconductor detectors. However, electro-chemical CO detectors submerge electrodes in an electrolyte, usually sulfuric acid, to detect changes in CO levels. These kinds of detectors use the same technology used in professional sensing equipment, and has been proven to be the fastest responding CO detectors on the market. Electro-chemical CO detectors have the most consistent response times of any CO detectors, making for less false alarms and more efficient warnings. Crossfire Alarms improve the timing by the addition of a quartz crystal oscillator. This timing device is the same type used in a fine watch. The quartz crystal oscillator creates an extremely accurate timing of the alarm in all CO situations. In addition, the Crossfire alarm uses an industrial lithium manganese battery and extends the life of its CO alarm to 10 years.



Crossfire Alarms do not sell individual alarms but instead create a personalized system that is designed to fit each home. To install, a Crossfire Alarms representative comes to a home and inspects the entire layout of the home to determine the best positioning for each type of alarm in each room. This process makes each home safer by strategically placing each alarm to provide a safer situation for each family.

Crossfire Alarms is primarily focused in the United States and Canada. All Crossfire alarms products are made in the United States. Crossfire Alarms are the fastest, most effective alarms on the market that are proven to alert people faster than any other alarm on the market. By utilizing superior detection technology, an interconnected system, and wireless positioning, Crossfire Alarms has been saving lives since it began in 1971.

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