Portable TDS Meter Digital Water Quality Tester Pen for Drinking Water 0-9990ppm Features: Large LCD intelligent display: water quality and temperature are displayed together, the screen is large and the display is accurate. Adopt low power consumption intelligent imported chip, high data accuracy Durable, stable detection Alloy electrode probe: alloy precision probe, high sensitivity, fast response, small error built-in high-precision temperature sensors, automatic temperature compensation, in the case of temperature changes in the measurement remains stable. Use of scenarios: daily drinking water, swimming pools, aquaculture water quality, agricultural water, daily water use, water quality testing.   Parameters: Product name: TDS water quality testing pen Measuring range: 0-9990ppm Product Function: Detect TDS value Working environment: 0 ℃ -60 ℃ Product probe: alloy probe Battery: 3V CR927 button battery * 1 (including battery shipment)   Package includes: Water quality tester * 1