Add-on sensors for our HVAC Smart Relay Switch (HSRS), RF wireless model. For installations where traditional wire runs are not possible or simply inconvenient. Sold as a set of two (2).




  • Compact design (measures 3.25″ x 1.5″ x 0.5″)
  • Auto-addressing (65,535 possible IDs)
  • Expandable (up to 8 wireless sensors)
  • Compatible with HSRS system (wireless model)
  • Battery-operated (requires 2 AAA batteries)
  • Simple mounting with foam tape or screws (both included)



What’s Included:

  • Door/window transmitters (qty 2)
  • Magnets (qty 2)
  • Double-sided foam tape
  • Screws


  • Requires two (2) AAA batteries each, not included


Additional Info:




Brochure (PDF)


Ask a Question:

Weight 1 lbs

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