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BJdfgE DO9100 Digital Dissolved Oxygen Meter 0.0-40. /L Waterproof ATC .0-300.0% DO Tester Water Quality Detector
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snowchecking Digital Soil Temperature Humidity pH Sensor with NPK and Conductivity Monitoring for Outdoor Farming (3-in-1)
BJdfgE Digital PH Meter 7 In 1 PH/ORP/EC/TEMP/SALT/S.G/TDS Water Quality Tester High Precision Purity for Drinking(5PCS 7IN1)
