NETVOX Wireless Capacitive Proximity Sensor - R718VA is a device to detect the status of toilet water, hand sanitizer level, presence or absence of tissue. This device is connected with a non-contact capacitive sensor can be mounted to the exterior of the container, without direct contact with the object to be detected, which may detect the current water level of positions mounted, or the presence or absence of liquid soap or 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
Whether toilet paper presence or absence

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)

Frequency

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

Model	XKC-Y25-V
Working temperature	-5~100°C
Working humidity	5%~100%
Sensing container (non-metal) wall thickness	≤20mm (glass, plastic, non-absorbent ceramic, acrylic, rubber, etc. or composite materials thereof)

Waterproof level	IP67
Sensitivity	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.

Sensitivity
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.
Note:
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.

Physical

Dimension	L:112mmW:88.19mmH:32mm
Weight	150g
Operating Temperature	-20℃ ～ 55℃
Environment Humidity Range	<90% RH (No condensation)
Storage Temperature	-40℃ ～ 85℃

Datasheet:

R718VA.pdf

User manual:

R718VA_UG.pdf

Battery Calculator:

Netvox Battery Calculator

Netvox LoRa Command Resolver:

LoRa Command Resolver

R718VA - Netvox LoRaWan Wireless Capacitive Proximity Sensor for hand sanitizer monitoring