• 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.
  • Photo of Bluelab pH Checker with pH submerisible probe. Molded blue and white plastic with digital input screen
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    Handheld pH meter. Easy to use! A handy solution made easy with this clever little Bluelab ph pen will help you manage the success of your crops. This pH pen provides a pH reading of the solution so you know that the nutrients will be made available to your plants.
  • Milwaukee Waterproof pH Meter with carrying case and accessories
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    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
  • Photo of blue probe with flip top cover, button, and digital display
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    Simple, accurate, and cost effective way to measure alkalinity in fresh water!
  • Photo of yellow probe with flip top cover, button, and digital display
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    Simple, accurate, and cost effective way to measure high ranges of ammonia in fresh water!
  • Picture of a Hanna Iron Checker kit with digital gauge, packets, test vials and a case
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    Bridges the gap between simple chemical test kits and professional instrumentation! The new HI 721 Checker®HC portable handheld colorimeter features a resolution of 0.01 ppm (500 points) and ±0.04 ppm ±2% of reading accuracy. The HI 721 Checker®HC uses an adaptation of Standard Method 315 B.  
  • Photo of blue Hanna Chlorine Checker, and kit with capped test tubes, manual tests, and carrying case
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    Simple, accurate, and cost effective way to measure total chlorine
  • Photo of red Hanna nitrite checker probe with digital display and power button
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    Simple, accurate, and cost effective way to measure low ranges of nitrites
  • Photo of Hanna free chlorine test kit contents: blue probe with digital display, manual tests, two test tubes, and carrying case
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    Simple, accurate, and cost effective way to measure free chlorine
  • Photo of yellow probe with flip top cover, button, and digital display
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    Simple, accurate, and cost effective way to measure low ranges of ammonia in fresh water!  The Checker HC uses an adaptation of the ASTM Manual of Water and Environmental Technology, D1426-92, Nessler method. The reaction between ammonia and reagents causes a yellow tint in the sample.  
  • picture of the API Freshwater Master Test Kit
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    This kit tests water for five different parameters that affect the health of freshwater fish. The kit can complete up to 800 tests.
  • Picture of three bottles, two large and one small for a High Range Reagent Refills for Ammonia.
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    The HI707-25 are the replacement reagents for the HI707 Nitrite Low Range Checker® HC.