AC Infinity pH Meter Kit, pH Pen Tester for WaterA pH reader for water quality assessment designed to help monitor and maintain proper pH levels. Measures the acidity, alkalinity, and temperature of water for gardens, aquariums, pools, and more. Sensor probe with sensitive glass membrane delivers instant pH readings with high accuracy. IP 67 rated to be sealed from high volume moisture, dust, and sand; can also withstand high levels of heat. Lab grade pH monitor testing kit includes ready to use 4.