Pressure Sensors
In physical security, a "pressure sensor" is a device that detects weight or pressure applied to a surface. It is commonly used to monitor access points and identify potential security breaches by detecting the presence of an unauthorized person attempting to enter an area. This can occur through methods such as "tailgating" (following closely behind an authorized person) or pushing through a door that should remain closed.
**Key Points About Pressure Sensors in Physical Security:**
**Function:**
Pressure sensors detect when someone is leaning on a door, pushing against a barrier, or trying to force entry into a restricted area by applying pressure to a designated spot.
**Mechanism:**
A pressure-sensitive pad or sensor is typically embedded in a door frame or other surface. When pressure is applied, the pad or sensor changes its electrical resistance, which triggers an alarm signal.
**Applications:**
- **Access Control Vestibules (Mantraps):** These are installed in the space between two sets of interlocking doors. They alert security personnel if someone tries to force their way through or closely follows an authorized person.
- **High-Security Areas:** Pressure sensors are used on doors leading to sensitive locations such as server rooms, vaults, or restricted laboratories to detect unauthorized entry attempts.
**Important Considerations:**
- **Sensitivity Settings:** Pressure sensors must be adjusted to distinguish between legitimate entry (e.g., a single person pushing through) and unauthorized intrusion attempts (e.g., excessive force or multiple people pushing).
- **False Positives:** Environmental factors like strong winds or vibrations can occasionally trigger a pressure sensor alarm. Proper placement and calibration are essential to minimize false positives.
This revised text should provide a clearer and more concise understanding of pressure sensors in physical security.