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PINPOINT ORP Monitor - American Marine
American Marine$114.99PINPOINT® ORP Monitor will measure the ORP (oxidation-reduction potential, or REDOX) of your system. It is popular with those who use ozone gas or potassium permanganate as an artificial oxidation agent in fresh or saltwater. It is also popular for... -
MW500 Standard Portable ORP Meter - Milwaukee Instruments
Milwaukee Instruments$109.00Standard portable meters with no frills! Milwaukee’s low cost durable meters for quick and reliable measurements. Milwaukee’s Standard meters are manufactured to be easy to use, practical and accurate. Ideal for the classroom, laboratory...