I have a non-blocking tape that works, but not so if you want easier and more accurate measurements. Locking is automatic, unlocking is done by simply pressing your thumb. The tape is wide, bright and easy to read.
π Dioxide Controller for Digital Gas Monitoring
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Portable Handheld Manometer π for Accurate Pressure Differential Measurement
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π¬οΈ Advanced 3-in-1 Indoor Air Quality Monitor with CO2/RH/Temp Data Logging and Audible Alarm - NDIR Sensor Technology
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π₯ Advanced Testo Wireless Hot Wire Anemometer Technology
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