I saw a tool similar to this one and decided to research further. I found them to be similar but the Bluebana product seemed more durable and the markings were clear and the black on yellow contrasted well. It also had good customer reviews so I ordered two, one for me and one for my son-in-law who builds and rents a lot for his houses. The unit comes in a nice carrying case that protects it well from cuts and wear and tear from the toolbox. The instructions are basic tips but there is a link to a site where you can get more ideas and demos.
π¬οΈ Advanced 3-in-1 Indoor Air Quality Monitor with CO2/RH/Temp Data Logging and Audible Alarm - NDIR Sensor Technology
8 Review
Portable Handheld Manometer π for Accurate Pressure Differential Measurement
5 Review
π₯ Advanced Testo Wireless Hot Wire Anemometer Technology
4 Review
π§ UEi Test Instruments DAFM3B Digital Multimeter
6 Review