| 摘要 |
<p>A fire detection system comprising: an expansion member which is configured to expand from a normal condition by predetermined amounts when exposed to temperatures associated with a fire; a sensor mechanism which is configured to issue a first signal on sensing a first predetermined expansion of the expansion member from the normal condition, and to issue a second signal on sensing a second predetermined expansion of the expansion member from the normal condition, the second predetermined expansion from the normal condition being greater than the first predetermined expansion from the normal condition; and an alert module configured to transmit an alert signal after both the first and second signals have been received.</p> |
