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  • Two Dial Automatic Electronic Water Timer Garden Watering Irrigation Controller

    Portable, hand-pocket-sized design, portability and convenience LCD screen, green backlight, easy to quickly read Automatic temperature compensation (ATC) automatically considers temperature changes
    Suitable for all home and laboratory pH testing applications including aquariums, swimming pools, swimming pools SPA, drinking water, biochemical experiments In addition, you should calibrate the tester if it has been used or left on for a long period of time; recalibrate, it is used frequently; recalibrate, accurate high precision, recalibrate
    Note: You need to calibrate.