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The camera's built-in sensor is a pyroelectric infrared sensor, which means it uses infrared rays to
detect temperature differences within its range that are emitted naturally by people, animals, etc.
The sensor can be used to trigger the camera to buffer (i.e., temporarily store) camera images in its
memory. You can view these images later as desired. The sensor can also be used to trigger the
camera to transfer images to someone or somewhere, by FTP, E-mail, or HTTP.
Sensor's Active Detection Range
• If there is no temperature difference between objects in range of the camera's sensor and the
surrounding environment, such as on a hot summer day, the sensor may not be able to detect
properly. Conversely in winter when the outside air temperature becomes lower, differences in
temperatures become greater which makes it easier for the sensor to perform detection.
• If the camera is mounted facing a road, the sensor may detect incorrectly due to interference
caused by passing cars. Refer to Example 1 or Example 2 on page 15 for examples of how to
mount the camera so that it will not face roads that cause interference.
When the camera is in a 20 °C (68 °F) environment
Camera
Detection range angle
Detection range length
About 5 m (16 feet 5 inches)
Built-in Sensor (BL-C160 Only)
Built-in Sensor
About 20
11
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