Judging by other reviews, my square is actually not a square. As a layman, I didn't check if it was square until my return window closed. The deviation is about 0.5 degrees. I love the look and if it were square it would be a 5 star product.
π Dioxide Controller for Digital Gas Monitoring
5 Review
Digital multimeter RGK DM-12
6 Review
π Enhanced Precision with Backlit Professional Manometer for Differential Ventilation
6 Review
π¬οΈ Advanced 3-in-1 Indoor Air Quality Monitor with CO2/RH/Temp Data Logging and Audible Alarm - NDIR Sensor Technology
8 Review