Disclaimer: this is not my design! This is the brilliant brain child of Jim Rosenthal and Richard Corsi, who distributed plans across the interwebs shortly after it became apparent that SARS-CoV-2 was an airborne pathogen.

The Blaster is a semi-portable 20 watt 222 nanometer (nm) Far Ultra Violet C (Far UVC) air sterilizer. This unit can easily sweep a small room of airborne viruses like SARS-CoV-2. It can be powered off a 20W wall transformer or a 24V Cobalt battery for portable use.

The Personal Health Air Sterilizer (aka Phaser) is a wearable 222 nanometer (nm) Far Ultraviolet Violet C (Far UVC) air sterilizer. 222nm light has the unique property of being able to inactivate airborne viruses without causing damage to your skin or eyes.

We loved the rugged reliability of the Aranet4, but we were very interested in making a wearable sensor. The Airship is based on a Sensirion SCD-41 photo-acoustic sensor about the size of a sugar cube paired with a LilyGo dev board and a small lithium polymer battery. The LilyGo has an attractive RGB screen and built-in Bluetooth. The whole unit is about 1/3 the size of an Aranet4.

Back when COVID-19 was a thing, Airhounds wrote an IOS app to pull CO2 readings from an Aranet4 sensor and run them through an algorithm that estimated your probability of infection by a handful of different airborne diseases.