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Lathem Sonachron

Looking to ring bells without the expense of purchasing a master clock, the Lathem Sonachron is a reliable unit with unmatched flexibility.  Use the relay to notify employees of breaks, lunches, or shift changes with 110v bells or a PA system.

Standard Features

  • An optional dip switch can be set for operating the unit as a control device. As a control device, the relay latches On or Off according to your schedule.
  • A keypad allows easy programming and changes to schedule for operating the internal 10-amp dry contact relay.
  • The weekly schedule can have up to 1,440 events. Each event includes the day(s) of the week and the time.
  • Signal duration can be set from 1 to 99 seconds.
  • If desired, a 4-digit security code entry can be required by keypad for preventing unauthorized tampering.
  • An internal battery retains memory and timekeeping during power failures lasting up to 7 days.


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