- Automatic calibration at one or two points with two sets of memorized buffer values for ease of use
- Replaceable electrodes to prolong life of meter
- Automatic temperature compensation (ATC) eliminates need for extra calculations
- Waterproof and floats in water
- Automatic shut-off to extend battery life
The Hanna Instruments HI 98129 is a multi-parameter tester that measures pH, electro-conductivity (EC), total dissolved solids (TDS), and temperature, and features automatic temperature compensation (ATC), an LCD screen, automatic shut-off, and a waterproof body that floats in water. The tester automatically compensates for the effects of temperature when taking pH and EC/TDS readings, so additional measurements and manual temperature entries are unnecessary. The HI 98129 meter has a replaceable pH electrode with an extendable cloth junction, and an EC/TDS graphite electrode that is resistant to salts and other corrosives. These features extend the life of the meter by allowing for replacement of the electrodes. Calibration is automatic
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