Colorimeter Handheld, DR 900 Multiparameter, HACH tests, Display:Graphical display 240 x 160 pixels, 231 mm x 96 mm x 48 mm, wavelength range- 420 nm, 520 nm, 560 nm, 610 nm
conductivity tester, handheld device provides a qualitative visual indicator of the conductivity of different solutions, acids or salts, Two brass probes can be touched to a solid substance, or immersed in a liquid, to show conductivity on green LEDs