orp-16911 orp/ portable redox tester - 1999~1999mv backlight lcd digital water quality test pen orp analyzer test monitor

description: clear lcd with backlight function. provides instant display of measured value. it has protective cap that helps reduce contamination application areas: aquaculture, drinking water, swimming pools, aquariums, food processing, laboratories, paper industry, etc. compact pen size and light weight for mobility. specification: color: red material: size: 150mmx30mm×20mm measuring range: -1999~1999mv resolution: 1mv accuracy: ±5mv power supply: 4x 1.5v (ag-13 button battery) (n