The ORP Meter pen is professional and ideal tool for testing your water level. Suitable for aquarium basins and environmental water. Features: Use to measure the amount of oxidation reduction potential (ORP). The tendency of the solution to either gain or lose electrons. Clear LCD with backlight Use in water sources, aquarium, hydroponics, spas, swimming pools and other water systems. Mini small size, easy to carry. Compact and portable pen design. Easy to use and provides instant display of results. Specification: : Range: 1999mV ~ 1999mV Resolution: 1mV Accuracy: ± 5mV Operating Temperature: 0℃ ~ 50℃ (32°F ~ 122°F) Battery: 2 × 3V (CR1632) Button Cell Battery (not included) Colour Yellow Material: ABS Item Size: 14.8 x 2.6 x 1.4cm / 5.8 x 1.0 x 0.6in Product Weight: 37.4g Package size: 1.8oz x 1.3oz
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