The detection pen shells adopt plasticmaterial, and the probes adopt metal alloy, which is not easily damaged and has high sensitivity Three types of impurities can be measured in water on business / play / shopping, detect the values of water, with a measurement accuracy of ± 2 Simply place the detection pen in the water to be, press the button, and the display screen will immediately display the values of the water, allowing you to have a more understanding of the purity of the water and The pen with digital display screen, with data and reading The factors that affect the values include high water temperature, large water bodies, and high pollution concentrations, Manufacturer: BULAIDAI