Apera Instruments AI104G GroStar Series GS4 pH/EC/500ppm/700ppm Combo 5-in-1 Pen Tester Kit with Replaceable Double-Junction pH/EC Probe for Hydroponics Water Quality Testing, Gen II

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About This Lab-grade pH/EC/TDS meter designed specifically to meet growers' needs and habits Measures pH, EC, 700ppm, 500ppm, and temperature with premium probe technologies, ensur ing high accuracy and durability with minimal maintenance Grower-friendly calibration workflow on an HD backlit screen allows you to finish 2-point calibration within a minute Replaceable combo probe with double junction pH sensor and titanium EC sensor Electrode condition indicator and calibration reminder function help you perform proper maintenance in a breeze Show more