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Elk Doorbell & Telephone Ring Detector


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Converts Signal To Activate Automated Response

The ELK-930 performs three functions. It can detect ring activation from one or two doorbell buttons and a single telephone line. It conveniently isolates the voltage and current and produces a signal which can be used to trigger an automation controller, relay, timer, etc. The circuit board is pre-scored so that the individual detectors may be snapped off (separated) from each other.

  • Small, Compact Size
  • Double Sided Foam Tape Provided For Mounting
  • Lifetime Limited Warranty


  • Detects Doorbell Activation Current
  • Inputs for Two Separate Pushbutton Locations
  • No Interference With Lighted Pushbuttons
  • Produces an Open Collector Output
  • Powered by the Doorbell Transformer


  • Detects Telephone Ringing Voltage
  • Provides an Open Collector Output that follows the ringing pattern

Doorbell & Telephone Automation

Communications systems are an important part of your automated home – from full-service Home PBX systems with voicemail, to intercom systems, to video door phones, to doorbell and phone detectors.


  • Manufacturer Part #: ELK-930
  • UPC: 762158009303