This trio made it very easy to get accurate verticals and horizontals when building my woodshed. The handles integrated in the large ones make work easier when you are carrying a number of other tools at the same time. It's very handy to have more than one ruler when building a structure!
π Dioxide Controller for Digital Gas Monitoring
5 Review
Portable Handheld Manometer π for Accurate Pressure Differential Measurement
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Digital multimeter RGK DM-12
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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
8 Review