How accurate are your test results? General Hydroponics TDS Calibration Solution is for conductivity meters measuring 1500 ppm. Easy to use, just dip the sensor into a small amount of the buffer and adjust. Do NOT reuse.
ALL General Hydroponics solutions are of the highest quality, allowing growers to calibrate many popular brands of meters/ monitors (NaCl scale or the 442 scale).
Available size: Quart (32 oz)
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