Sku: R718VB-AS923

Availability: Many In Stock
Sku: R718VB-AS923

NETVOX Wireless Capacitive Proximity Sensor - R718VB can detect the toilet water level, hand sanitizer level, presence or absence of toilet paper, it may also be applied to non-metallic pipes (pipe diameter D≥11MM) liquid level detector. This device is connected with a non-contact capacitive sensor which can be mounted to the exterior of the container, without direct contact with the object to be detected, which may detect the current position of liquid level, or the presence or absence of liquid soap, toilet paper; the detected data is transmitted to other devices through the wireless network. It uses the SX1276 wireless communication module


Example Applications

  • Flush toilet water level detection
  • Hand sanitizer level detection
  • Toilet paper presence or absence
  • Non-metallic pipe (pipe outer diameter D ≥ 11mm) liquid level detection

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
• R718X series carry magnets which can be attached to ferromagnetic materials and objects
*Actual range may vary depending on environment.
*Battery life is determined by sensor reporting frequency and other variables


Technical Specifications 

Input Power 2 x 3.6V ER14505 AA lithium batteries
Sleeping Mode 30uA
Wake up Mode 6.3mA @ 3.3V
Low Voltage Threshold 3.2V
Tx Current 120mA/3.0V
Rx Current 11mA @3.0V
Battery Life  

5 years

(Conditions: ambient temperature 25 °C, 15 min heartbeats, txpower = 20dBm, LoRa spreading factor SF

= 10)



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


Non-contact capacitive sensor device



Working temperature


Working humidity


Induction container (non-metal) wall thickness

≤20mm (glass, plastic, non-absorbent ceramic, acrylic, rubber, etc. or composite materials thereof)

Applicable pipe diameter range



Installation method

Stick the probe with double-sided tape. When used in pipeline liquid level detection, users can also use nylon cable ties and pipes to tighten


Waterproof level



The sensitivity of the non-contact capacitive sensor must be adjusted in the field according to different liquids or objects and the thickness of non-metallic containers.

The height of the sensed liquid level or the distance between the toilet paper and the sensor is related to the sensitivity of the sensor; the higher the sensitivity, the lower the level of the induced liquid is detected, or the greater distance between the toilet paper and the sensor (up to approximately 2 cm) is detected.

During installation, when the liquid level below the sensor installation position is not detected, the sensitivity can be adjusted to be higher to detect the wanted liquid level height; when there is paper in the sanitary carton that is not detected by the sensor, the sensitivity can be adjusted to be greater.
1. Avoid metal materials at the probe mounting site so as not to affect the detection.
2. The liquid with higher concentration will appear on the wall which will affect the detection.
When applied to hand sanitizer, in order to avoid the impact of the wall, users should pay attention to the decision of installation location.






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

R718VB - Netvox LoRaWan Wireless Flush Toilet /Washing Liquid Bottle/Toilet Paper Detection Sensor

Sku: R718VB-AS923

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