https://www.thethingsnetwork.org/device-repository/devices/netvox/r311la/
R311LA - Wireless Infrared Proximity Sensor | Device Repository for LoRaWAN
R311LA is able to detect the existence of the object nearby. It has an infrared proximity sensor that can detect if there is object existing within it...
proximity sensor device
https://www.thethingsnetwork.org/device-repository/devices/netvox/r718va/
R718VA - Wireless Capacitive Proximity Sensor | Device Repository for LoRaWAN
proximity sensor device