Analog Agricultural Sensors

Something we have been very aware of since the beginning of this project is that a sensor doesn't necessarily have to contain batteries and electronics to be a useful tool. In fact, people have been finding creative ways to track and gather feedback about their environment since the beginning of time.

The following is a collection of simple analog sensors we found from our research in Myanmar, if you click on them a description will pop up. Are there any you would add to our list?