| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a security detector which detects the attachment of a matter that hinders a detection function and signals it only by adding a simple configuration to the security detector. SOLUTION: This infrared detection type security detector 10 detects infrared light from a detection area, outputs an alert, connects a security receiver and the detector 10 through an alarm signal line, inserts a normally-closed contact which opens a contact according to the detection of infrared light to the alarm signal line, has a base part 11 and a cover part 12 as a housing of the detector 10 and disposes a switch 20 which detects that the part 12 moves against the part 11 between the parts 11 and 12.</p> |
