Description
The HI9813-51 is a cost-effective, water-resistant, portable meter designed to measure pH, conductivity (EC), total dissolved solids (TDS), and temperature using a single probe. The meter's user-friendly design includes dedicated buttons for selecting measurement modes, which are displayed on the large LCD screen, and knobs for simple single-point calibration of both pH and EC/TDS.
Equipped with a variable EC to TDS conversion factor, the HI9813-51 automatically adjusts from 0.56 to 0.78 ppm = 1 µS/cm based on the actual EC reading. All readings are automatically temperature-compensated using a fixed temperature correction coefficient (ß) of 2%/°C. This makes the HI9813-51 ideal for agricultural, greenhouse, and hydroponic applications.
Key Features:
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3-in-1 probe with pH, EC/TDS, and temperature sensors
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Amplified pH electrode provides immunity to electrical noise, including from ballasts and pumps
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Large LCD with tutorial instructions for easy operation

