Sku: R311A-AS923

Availability: Many In Stock
Sku: R311A-AS923

NETVOX Wireless Door / Window Sensor is a magnetic contact sensors available to detect opening or closure of doors and windows. The radio transmission is based on the new disruptive LoRa long range technology. R311A will transmit information and data to the server from openings and closings of doors, windows, gates etc based on the desired behavior. The low battery consumption device is long lasting which ensures optimum usage. 

Thanks to small sizes, they can be installed everywhere. They are wireless so they take up minimal floor space.The transmission is direct to a central center that can be programmed to trigger an alarm system.Thanks to innovation, these wireless sensors are more reliable and precise and they can detect several applications

Example Applications

• Commercial property door and window access
• Residential property door and window access
• Bank owned for closure properties access monitoring
• Restricted area monitoring
• IT server rooms and closets
• Freezer and cooler doors
• Shipping cargo bay door monitoring
• Garage door monitoring


Features of NETVOX Sensors

• Wireless range of 10 km *
• LoRaWANTM Class A compatible
• Frequency Hopping Spread Spectrum (FHSS)
• Improved interference immunity
• Improved power management for longer battery life
• Encrypt-RF™ Security (Diffie-Hellman Key Exchange + AES-128 CBC for sensor data messages)
• Battery Life* :
5 years (Conditions: ambient temperature 25 °C, 20 triggers/day, txpower = 20dBm, LoRa spreading factor SF = 10)
• 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
*Actual range may vary depending on environment.
*Battery life is determined by sensor reporting frequency and other variables


Technical Specifications

Input Power 2pcs 3.0V CR2450 button battery
Working Voltage DC 2.4V~3V
Standby Current 12uA/3.0V
Tx Current 120mA/3.0V
Rx Current 11mA @3.0V
Voltage Threshold 2.4V
Battery Voltage measurement accuracy   ±0.1V



Tx Power 19dBm±1dBm
Rx Sensitivity -136dBm (LoRa,Spreading Factor=12,Bit Rate=293bps ) -121dBm (FSK,Frequency deviation=5kHz, Bit Rate=1.2kbps)
Antenna Type Build-in antenna
Communication Range Build-in antenna
Data Transfer Rate 0.3kbps~50kbps
Spread Technique   LoRa/FSK
Available Frequency   EU863-870,US902-928,AU915-928, KR920-923,AS923,CN470-510 Configured before shipment



Main Body Dimension

57mm x 35mm x 15mm

Magnet Dimension

43mm x 13mm x 12mm



Operating Temperature

-20℃ ~ 55℃

Environment Humidity Range

<90% RH (No condensation)

Storage Temperature

-40℃ ~ 85℃




User manual:


Battery Calculator: 

Netvox Battery Calculator 

Netvox LoRa Command Resolver: 

LoRa Command Resolver

R311A - Netvox LoRaWan Wireless Window Sensor

Sku: R311A-AS923

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