This versatile water quality tester measures total dissolved solids, temperature, and water level. The digital TDS meter allows you to easily monitor water purity in your aquarium, swimming pool, pond or other water systems. Simply submerge the probe and read the instant ppm and temperature readings on the large backlit display. The included temperature sensor takes additional measurements to ensure optimal water conditions for your fish and plants. An integrated low water alarm and auto-shutoff function protect the sensor from damage. Lightweight and portable, it's easy to use this TDS meter anywhere liquid levels need monitoring. Maintain crystal clear water with this accurate all-in-one water testing tool.