Abstract: A feed-supplying system includes a feeder and a scale. The feeder includes a bin, a valve module and a monitoring module. The monitoring module controls the valve module to open an outlet of the bin to allow the feeder to supply feed, measures a vertical inside-bin distance, and outputs a notification when it is determined that an amount of stored feed is less than a threshold based on the distance. The scale supports the supplied feed, senses weight of a load thereon. When it is determined that an amount of the supplied feed has reached a threshold based on the weight, the monitoring module controls the valve module to close the outlet so as to stop the supply of the feed.

Abstract: A pH measurement system includes a measurement apparatus that is capable of connection to a mobile device and a server and that includes a measuring instrument and a monitoring device. The measuring instrument includes a tube, and a sensor rod that is disposed is the tube and that is for sensing a pH value of a measurement target. The monitoring device includes a microcontroller communicatively connected to the sensor rod, an operation module for operation by a user, a communication module for communication with the mobile device and the server, and a display module for displaying information. The microcontroller provides the pH value to the mobile device or the server through the communication module.