Inexpensive and practical device with 1-point calibration, easy to use and very accurate Measurement range: -1999 ~ 1999 mV in 1 mV steps Portable and compact : Portable design, determine water quality indicators with this ORP meter in minutes. LCD Backlight: The water meter is equipped with low-power backlight technology for easy testing water at night or in dark places. It can also be used to distinguish between drinking water and non-potable water Wide use: ideal for home and laboratory and industry (testing drinking water, in aquariums, artificial reservoirs, sewage), swimming pools, water treatment systems, aquaculture, spa, etc. ORP-969 Digital ORP Tester pen type with hold switch -1999mV~1999mV oxidation reduction potential. Features: Use to measure the quantity of oxidation potential level. The tendency of the solution to gain or lose electrons. Clear LCD display with backlight. Use in water sources, aquariums, hydroponics, spas, swimming pools and other water systems. Small
