Door Open Too Long Alarm (DOTL)

Door Open Too Long Alarm


Microprocessor based Door Status Detector Module is a rugged product that can be used to detect / alert when a door (access door / normal door) is opened but not closed properly. Especially in critical areas like BMS room, server room, conference room and security room, Electromagnetic locks are provided for security reasons. When the doors are not closed properly, the door lock will no hold the door so that a chance of unauthorized intrusion may occur. To avoid this situation, the DSDM is utilized for the following features.


  • Operates in wide range of input voltage
  • Binary switch to set the delay time
  • Mirror output of door position sensor (optional)
  • Audible Buzzer
  • Status indicator
  • MS powder plated enclosure