Dear Backers,

First and foremost, a huge thank you to everyone who has supported Polverine so far! Your enthusiasm and trust mean the world to us, and we’re excited to bring this project to life together.

We’d like to share more about the advanced sensing capabilities of Polverine. Our board integrates two state-of-the-art sensors from Bosch Sensortec:

BMV080: The world’s smallest PM2.5 air quality sensor, measuring particulate matter concentrations without the need for a fan.

BME690: A compact 4-in-1 air quality sensor that simultaneously measures gas, humidity, temperature, and air pressure. It’s capable of detecting Volatile Organic Compounds (VOCs), Volatile Sulfur Compounds (VSCs), and other gases.

In this experiment, we’ve placed Polverine inside a refrigerator to monitor food preservation. By analyzing gas emissions with the BME690 sensor, we aim to assess the freshness and storage conditions of various foods. We’ll share detailed findings from these experiments in future updates.

While we prepare to show you how to detect the freshness condition of certain foods, we are sharing sensor sampling data from a ventilated refrigerator and outside of it.

Inside the refrigerator

Outside the refrigerator

One interesting observation is the refrigeration cycle and its effect on humidity, as well as the comparison of particulate matter inside the refrigerator versus the external environment. The effectiveness of particulate filtration when the fridge door is opened is also notable.

If you have any questions or want to share your ideas, feel free to reach out via the Ask a Question link on our campaign page, or connect with us on social media.

Thanks again for being part of this journey. More updates coming soon!

Best,
The Polverine Team