6 in 1 TDS Meter, TOC Meter, Meter, UV275 Meter, Electrical Conductivity Meter Temperature Meter Water Test Kit has the most uptodate technology with high precision. Wide testing range makes it suitable for multiple applications, tap water, well water, water purified by drinking fountains, bottled water, groundwater, water not sewage and other drinking water TOC refers to organic pollution and other hazardous substances. These types of tests can usually only be performed in laboratories, but our advanced water test pens can perform these functions. Normally, TDS can only detect minerals and other dissolved solids in the water, and the TDS value alone cannot be used as a criterion for judging water quality.The probe is a laboratory spectroscopy probe, the device turns on and prompts calibrate within a week, to facilitate laboratory use. For less rigorous daily home use or outdoor travel, weekly calibration is not required. If you accidentally measure in wastewater, simply rinse with water. After a period of use, calibration can be performed with clean water. Tip Use purified water for calibration, not mineral water or natural drinking water.There are 4 levels of water quality Ecellent, Good, Average and Poor. Enable onebutton operation, just turn it on and put the meter into water, you can get stable and accurate data in seconds. With our 6parameter allround water quality meter to healthy water quality and environmentally friendly water, to avoid the absorption of harmful substances and accumulation in the body. Especially for the healthy growth of children and safe water for pregnant womengreat gift to give If you dont know any suitable gifts for the elderly, family members, pregnant women, friends, etc.Color WhiteMaterial PlasticPackage contents1 TDS meter digital water testerOnly the above package contents, other products are not included.Note Li