Gravity: Analog Dissolved Oxygen Sensor / Meter Kit for Arduino Category_Grove (Arduino)/Grove Radio/RF 11](https://github

11](https://github

Changeable CS pin for TF card slot

Along with the Speaker Amp

Optional external current-sensing resistors can be added to these pins

8 V linear regulator and level-shifters that allow it to work over an input voltage range of 2

Gravity: Analog Dissolved Oxygen Sensor / Meter Kit for Arduino Category_Grove (Arduino)/Grove Radio/RF 11](https://githubThis is a dissolved oxygen sensor kit. A dissolved oxygen meter is used to measure the dissolved oxygen in water, to reflect the water quality. It is widely applied in many water quality applications, such as aquaculture, environment monitoring, natural science, etc. Theres an old saying regarding keeping fish, Good fish deserves good water. Good water quality is very important to aquatic organisms. Dissolved oxygen is one of the important parameters