I thought it would be a cool gadget. Doesn't give an exact pattern. It doesn't cost any money and wasn't that expensive either. This is for the DIYers who really don't know anything.
π¬οΈ Advanced 3-in-1 Indoor Air Quality Monitor with CO2/RH/Temp Data Logging and Audible Alarm - NDIR Sensor Technology
8 Review
π‘οΈ Continuous Temperature Monitoring with Relative Humidity Integration
4 Review
Portable Handheld Manometer π for Accurate Pressure Differential Measurement
5 Review
π§ UEi Test Instruments DAFM3B Digital Multimeter
6 Review