One issue for warehouse shipping and receiving doors is the design requirement to only open a dock door when a truck is actually in the dock bay. Warehouse applications, where banks of overhead doors may be, can be economically covered with a single beam. Photoelectric is also used as a safety device for the protection from opened doors, docks, and shafts. The most economical beam sensor is photoelectric technology. Photoelectric systems are highly reliable for interior applications, and microwave systems have been heavily focused on exterior applications. These beam systems are designed to control and project narrow beams, creating a protective linear sensing barrier. The most common types of beam sensors are photoelectric and microwave.

Дual element eliminates the false alarms from the sudden noise and vibrations in glass areas caused by high winds.

The most common combination of sensor elements include one that monitors the shock wave set up by the breaking of glass and one that responds to the unique frequencies corresponding to the sound of breaking glass.

Дual element glass break devices are recommended.

They are not necessarily attached to a window often they are mounted away from the glass area and aimed in a manner that allows each device to monitor a portion of the glass. Glass break devices are designed to detect the breakage of glass. Single element detectors use just one type of technology (for example, ultrasonic waves) dual element detectors combine technologies (for example, ultrasonic waves and heat sensors) to provide better detection. There are many different types of motion detectors and a variety of sensor technologies: ultrasonic waves, infrared light waves, microwave (electromagnetic) fields, and passive infrared (heat sensors). Motion detection devices are part of most alarm systems. Recessing switches are also recommended to reduce potential tampering with the device and the connecting wires.

Д«alanced switches are recommended in any application that calls for magnetic contact switches.

Balanced switches, however, operate by creating a balanced magnetic field that detects increases or decreases in the sensorвЂ™s magnetic field strength. Regular magnetic contact switches can be tampered with through the use of an external magnet.

ДЄdditional protection can be obtained using balanced switches.When the door or window is opened, the magnetic contact is broken, and the alarm sensor is activated. The other unit is an actuated switch that is mounted on the frame. One unit, the magnet, is attached to the door or window. Magnetic contact switches consist of two separate units that are attached to a hinged or sliding door or window. Д¬onnect the alarm system with the CCTV system where appropriate.Whenever possible, recess door contact monitor switches. Backups and/or batteries are usually required. ДЄlarm sensors need a power supply that cannot be interrupted.

These protective coverings must be strong enough to withstand damage due to collisions and bumps. Provide protective covering for surface-mounted contact switches, wire connections, and wire distributions. Secure control boxes, external bells, and junction boxes for all alarm systems with high quality locks, or provide some type of alert if the alarm device has been tampered with or opened. Special care must be taken when designing alarm sensor systems so that they resist and prevent tampering and protect equipment from damage. ДЄlarm sensors, whether mechanical or electronic, must be strategically placed so that they can monitor conditions that require security alerts.Alarm sensors are devices that detect events that are not part of the normal working environment and that send signals to the alarm panel for processing.

Cisco receiver has remote alarm