Alarms

• Protective alarm - is another safeguard used to assist security to complement if not to supplement physical security is an array of alarms.
• Types of alarm systems:

  1. Metallic Foil or wire
  2. Photoelectric or electric eye
  3. Audio detection device
  4. Vibration detection device
  5. Microwave motion detection device
  6. Ultrasonic motion detection device
  7. Capacitance or electrostatic detection device
• Metallic Foil or Wire - in building or compound, all point of entry can be wired by using electrically charge stripes of tinifoil wire. Any actions that will move the foil or wire break the circuit and activate an alarm. it is used in windows or glass surfaces.
• Photoelectric or Electric eye device - a light beam is transmitted at a frequency of several thousand per second. It is connected by a wire to a control station and when an intruder crosses the beam he makes contact with the photo electronic coil with thus activates the alarm.
• Audio detection device - supersensitive microphone speaker sensor is installed in walls; ceiling and floors of the protected area of any sound caused by attempted forced entry inspected by the sensor.
• Vibration Detection device - is attached to walls, ceiling or floors of the protected areas. the sensor detects any vibration caused by attempted forced entry.
• Foot Rail authority - placing the foot to engage the activation bar places foot rail activator on the floor in such position that tellers may activate the alarm.
• Bill traps - or currency activation devices are usually placed in the teller's cash drawer and connected to the alarm system using a wire connector
• Bill traps - the advantage of these devices is that the robbers frequently remove the currency and activate the alarm. this is particularly helpful when the employees are immediately forced to leave their station without having an opportunity to activate alarm system
• Knee or thigh button - these are installed inside the desk or teller station so they can be activated by knee or thigh pressure.
• Knee or thigh button - they are commonly found in location where personnel usually perform their duties form a seated position.
• Foot button - like the foot rail permit alarm activation safely both hands remain clear in view of the robber.
• Double squeeze buttons - pressure is required on both side of the device and therefore the probability of accidental alarm is reduced.
• Types of Alarm Detection System

  1. Central station system
  2. Property system
  3. local alarm system
  4. auxiliary system
  5. local alarm-by-chance system
  6. dial alarm system
• Central station system - a type of protective alarm system where the central station is located outside the installation
• property system - this function in the same way as central system except that it is owned by, operated and located in the facility. Response to all alarms is by facility's own security or fire personnel.
• local alarm system - in this case, the sensor activates the circuit, which in turn activates a horn or siren or even flashing light located in the immediate vicinity of the alarmed area. Only guard within sound or hearing can respond to such alarms, so their use is restricted to situations where guards are so located that their response is assured.
• Auxiliary system - in this system installation circuits are led into local police or fire department by lease telephone lines.
• Local alarm-by-chance system - this is a local alarm system in which a bell or siren is sounded with no predictable response.
• Dial alarm system - this system is set to dial a predestined number when the alarm is activated.
• alarm - is synonymous to warning of imminent danger