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Ph Meter Hanna Accuracy - Original with 100% Precision slide box pole vault size matterspH Meter Hanna Accuracy Digital PH Tester Meter Pocket Pen Aquarium Pool Water Digital Tester pH Meter Hanna Accuracy is an ideal instrument for aquarium, fishing industry, swimming pool, school laboratory, food & beverage etc. Very excellent, accurate and durable. Note: The new digital tester shouldn't need to be adjusted. When you turn on the tester , you may find the measured value is not accurate and unstable, it's normal phenomenon. Put the
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