We have 4 of these. Used to detect overpainted (or original) paint on metal surfaces. They work just as well as the more expensive models and the battery life is good. Don't be fooled by the super cheap versions. You get what you pay for.
π§ UEi Test Instruments DAFM3B Digital Multimeter
6 Review
π Dioxide Controller for Digital Gas Monitoring
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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
Portable Handheld Manometer π for Accurate Pressure Differential Measurement
5 Review