This is one of those "why didn't I think of that" tool. Even though there are many variations of this tool, it is better to buy Matey Measure. I particularly like the force of the spring, it holds very well on the measuring tape.
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 Enhanced Precision with Backlit Professional Manometer for Differential Ventilation
6 Review
π₯ Advanced Testo Wireless Hot Wire Anemometer Technology
4 Review
π Dioxide Controller for Digital Gas Monitoring
5 Review