1. You will find a small cylindrical metal tube below the QR code. This small metal tube is the temperature sensor. Touching the sensor for several seconds will change the color in the tube. For hotter temperatures the light will be red.

2. for average room temperatures the tube will be green and for colder temperatures the tube will be blue. 

3. You may interact with the sensor to get it to change colors. Touching the sensor with your fingers will change it to orange, red. Touching the sensor with ice or something cold  will make it change to a blue color.

The sculpture outside has the same same sensor and takes a reading from the air then compares it with the data from 1950-70 to display a color. The 1950-70 temperature is set to display green (for baseline average) if the current temperature is over that average the color will be red.