• Microprocessor based waterproof pH tester. Testing pH has never been easier or quicker! This Microprocessor based waterproof pH meter offers 1500 hour battery life, very accurate manual calibration and protective case with calibration solution
  • picture of a Dissolved Oxygen Meter for Aquaculture with 7 buttons, a test wand and LCD display
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    A must have for DO sensitive organisms or high bio-load environments. The HI 9147 Dissolved Oxygen Meter is designed for aquaculture applications. This unit is unique among DO meters as it is supplied with a galvanic probe.