1、FOR VARIOUS OCCASION: TDS test pen is suitable for domestic water, aquaculture, swimming pool and other water quality detection 2、HIGH SENSITIVITY PROBE: Water quality instrument has alloy probe and high sensitivity glass electrode, realize high accuracy water quality measurement, support automatic temperature compensation, reduce error 3、WITH BACKLIGHT DISPLAY: The water quality tester automatically turns on the backlight display when turned on, allowing you to see the value even in dim conditions 4、CELSIUS FAHRENHEIT DEGREES SWITCH: TDS meter with temperature unit switch function, very flexible and practical 5、APPLICABLE SCENARIO: Water quality tester can be used for domestic water, swimming pool, aquaculture, environmental water quality, agricultural water, aquarium water quality, greenhouse flowers, bottled water, community water station