Real win for my CNC router. I've tested it on a synchronous motor and a drill with a tachometer and it's proven to be very accurate.
Digital multimeter RGK DM-12
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๐ฌ๏ธ Advanced 3-in-1 Indoor Air Quality Monitor with CO2/RH/Temp Data Logging and Audible Alarm - NDIR Sensor Technology
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๐ฅ Advanced Testo Wireless Hot Wire Anemometer Technology
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๐ Enhanced Precision with Backlit Professional Manometer for Differential Ventilation
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