What can I say. He does what he has to do. Delivered quickly which saved a life as my child needed this for a science fair. And it's almost impossible to find it in every retail store.
π PH 1-14 Extensive Storage Testing Monitoring: Optimize Your Storage with Precise pH Level Monitoring
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Digital PH Meter Tester - Tiaoyeer Water Quality Tester With ATC, 0.01PH High Accuracy, 0.00-14.00 Measurement Range, 0.01 Resolution For Drinking Water, Aquarium, Swimming Pools, Hydroponic
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Portable digital multimeter with sound continuity and thermocouple (electric tester) LTX DT-838
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π Dioxide Controller for Digital Gas Monitoring
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Portable Handheld Manometer π for Accurate Pressure Differential Measurement
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