NB-IoT DF550 Top installation Ultrasonic Liquid Level Sensor
The DF550 is ultrasonic level (distance )sensors which can measure the air height directly and calculate the liquid or solid height based on the total height of the container (distance). It is applicable for the close container or open container, or even the river. DF550 Ultrasonic Liquid Level Sensor is build through the NB-IoT module. it transmit the status via NB-IoT sim card to base station,then via internet network to network server to application server. Finally user can monitor the status remotely.