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HANNA Instruments HI 8424 microcomputer pH meter /mV | eBay
![HANNA] pH 측정기 HI 8424 사용 및 캘리브레이션 방법 - 한나 pH Meter instruction and calibration method - YouTube](https://i.ytimg.com/vi/PneU9RyDo3w/maxresdefault.jpg "HANNA] pH 측정기 HI 8424 사용 및 캘리브레이션 방법 - 한나 pH Meter instruction and calibration method - YouTube")
HANNA] pH 측정기 HI 8424 사용 및 캘리브레이션 방법 - 한나 pH Meter instruction and calibration method - YouTube
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Hanna Instruments HI 8424 Waterproof Portable pH Meter, with ATC and HOLD Feature: Science Lab Ph Meters: Amazon.com: Industrial & Scientific
