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
pH pen for standard test tubes 16x50 mm or larger. Range: 0 - 14, Accuracy: +/- 0.2, Designed for simple one-hand operation. Automatically calibrates to pH 4, 7 and 10 buffers and can be adjusted to recognize any buffer. The case is IP65 waterproof. Probe: 120 mm Ă— 12 mm