Dry contact sensor R311CA

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Netvox wireless dry contact sensors can be used to detect contact between two wired contact points. It can realize wireless alarm and other functions through built-in wireless module, and is compatible with LoRaWAN protocol. It can be easily networked with other related devices. The R311CA is durable and ensures optimum use and is a low power consumption device. Due to their small size, they can be installed anywhere, they are wireless, so they take up very little space.

Main Property

  • 2 section 3V CR2450 button battery
  • Compatible with LoRaWAN protocol
  • Apply SX1276 wireless communication module

Example Application

  • Smart home
  • Anti-theft system
  • Industrial equipment
  • Security field


  • LoRaWANTM Class A compatible
  • Frequency Hopping Spread Spectrum (FHSS)
  • Improved interference immunity
  • Improved power management for longer battery life
  • Encrypt-RFTM Security (Diffie-Hellman Key Exchange + AES-128 CBC for sensor data messages)
  • Battery Life:
    − Please refer to web: http://www.netvox.com.tw/electric/electric_calc.html
    − At this website, users can find battery life time for varier models at different configurations.
  • Over-the-air updates (future)
  • Third-Party online wireless sensor monitoring and notification system to configure sensors, view data and set alerts via SMS text and email (optional)
  • Available third-party platform: Actility/ThingPark, TTN, MyDevices/Cayenne


Dry contact sensor R311CA Datasheet