24-7 pH Replacement Probe Organic Labs Easily switch between water flow

Easily switch between water flow selections with the quick-change feature

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The Autopilot Greenhouse Master Controller (GMC) is designed to precisely control temperature

24-7 pH Replacement Probe Organic Labs Easily switch between water flowA great all around meter for nutrient applications needing constant monitoring. It measures PPM, pH and Temperature. Its large illuminated green LCD display allows easy reading from a distance. Both pH and PPM are temperature compensated for accurate readings. The electrodes are replaceable. Calibration screws are conveniently located on the front for easy access. The chip is programmed to use the international water standard 500 PPM = 1 EC TDS