【MULTIFUNCTIONAL (4 IN 1) & 5 UPGRADED】 4 in 1 TDS Meter, Electric Conductivity Meter & Temperature (°C,°F)Meter features the most updated technology.Upgraded with big backlit LCD for easier reading, auto-lock function for easier use, factory calibrated and hold function for direct use and auto-0ff in 2 minutes to conserve battery. These enhancements make it a user-friendly tds meter digital water tester for a variety of applications

【USER-FRIDNDLY DESIGN& QUALIFIED WATER TELLER】This water hardness test meter with Big Backlit LCD is far superior than most digital water quality tester display, which allows wider angles of data reading and night reading. Besides, when ppm figure over 40 drinking with caution. And ppm figure below 40 indicates TDS figure qualified for direct drinking water (Notes: International standard adopted TDS figure 40 as a dividing line.)

【PPM Value Range】Ppm values 0-50 means ideal drinking water; ppm values 50-100 means comparatively ideal drinking water; ppm values 100-200 means marginally acceptable drinking water; ppm values 300-400 means the scale will form;ppm value 400-500 indicate the water taste is not very pleasant; If the ppm value is over 500, the water is contaminated and cannot be drunk

【EASY OPERATION & ENERGY SAVING】The ppm meter allows one button operation, just turn it on and put tds meter into water, you can get stable and accurate data in seconds. Besides, there is a reference chart at the back of this test meter for tds figure explanation