Orp-169e Tester Pen Meter Waterproof Tester Redox Potential Positive Negative Orp Meter For Water Systems

--Professional 169E ORP/redox tester waterproof ORP meter ORP tester potential positive and negative ORP meter.

--Compact and portable pen-type design.

--Easy to use and provides instant display of results.

--Suitable for water sources, aquariums, hydroponics, spas, swimming pools and other water systems.

--Packed in a plastic box for easy storage and portability.