ORP Redox Meter -1999~1999mV Oxidation Reduction Potential Tester with 256mV ORP Calibration Buffer for Water Testing, Aquarium, Research Laboratory
 
Product Features
  

         
Inexpensive and practical device with 1 point calibration, easy to use and highly accurate
         
Scale of measurement: -1999 ~ 1999 mV in 1 mV steps
         
Find out quickly the sort of water you drink and how your filter works efficiently and effectively.
         
Determine the water quality indicators with this ORP meter in just a few minutes. Carry-everywhere design.
         
Best for laboratory and industrial households (drinking water test, in aquariums, artificial ponds, wastewater), pools, water treatment systems, aquaculture, spa, etc.