1500 ppm NaCl
Out of stock
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)