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ELK 2-Way Wireless Mini Window Sensor

SKU: ELK6021x

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Intruder Alerts For Windows

Let your Elk system keep an eye on your windows for you. The Elk Wireless Mini Window Sensor easily attaches to a window and triggers an alert if the window is opened, helping you keep your home and family safe.

  • Monitors a window to alert you when window opens
  • Compatible with the Elk M1 Wireless Transceiver
  • Ideal for double hung or casement style wood/vinyl windows.
  • Nearly invisible installation

This exceptionally thin wireless window sensor is perfect for double hung and casement style wood/vinyl windows. The sensor contains a built-in reed switch and reports a unique TXID identifier to the transceiver. It also features Elk's Industry Leading Two-Way Technology, capable of on-demand status updates and superior battery life.

Note: Requires the Elk M1 Wireless Transceiver (sold separately).

Premium Products For Security & Automation

Elk Products designs and manufactures quality electronic equipment for the professional security alarm and home automation installer. Our products include siren drivers, speakers, relays, timers, programmable controls, surge suppressors, telephone equipment, amplifiers, recordable units, batteries and more.


  • Manufacturer Part #: ELK-6021
  • Power Source: 3V CR2032 lithium battery
  • Size:
    • Sensor: 1.1(W) x 2.3(L) x 0.25(D) inches
    • Magnet: 0.37(W) x 2.3(L) x 0.25(D) inches
  • Frequency: 902 to 928 Mhz frequency hopping
  • Auto-Sync Type: C
  • Operating Temperature: 14 to 104 degrees F (-10 to 40 degrees C)
  • Relative Humidity: 5 to 95 percent Non-Condensing
  • Unique TXID Code: Over 1 million combinations