Best Seller Measuring Water Quality Purity Tester PH TDS Meter

What is tds?
total dissolved solids(tds) are the total amount of mobile charged ions,including salts or metals dissolved in a given volume of water. Tds,which is based on conductivity,is expressed in parts per million(ppm) or milligrams per liter(mgl).tds includes any inorganic element present other than the pure water molecule(h2o) and suspended solids.
 
the higher the tds level in water, the greater the of probability of harmful contaminants that can pose health risks or hinder the absorption of water.
The u.s. Epa�s maximum contaminant level of tds for human consumption is 500 ppm.
 
use the tds meter to:
check the performance of your water filter
check for the hardness (1 grain=17ppm)
make sure you always drink pure water.
Features
hold function saves the measurements for convenient reading and recording.
Auto-off function:turns off meter after 10 minutes of non-use to conserve batteries.
Dual range: measures from 0-999ppm,with a resolution of 1 ppm. From 1000 to 9990ppm,the resolution is 10ppm, indicated by drinking x 10 symbol,factory calibrated.
Advantages:â â 
(1)we upgrade the programme of then tds meter up to 6 times till now in order to make the tds meter more accurate ( precise) and perfect.
(2) our factory�s tds meter can be calibrated through pressing the button.
 calibrating steps as follows;
to hold �temp� button for 3-5 seconds and then you will see the number is beating in the displaying screen.
��hold� button is also called � increasing button� at this time.
Therefore , if you want to increase the tds value, you could press the �hold� button.
��onoff� button named �reducing button� at this time.
So, if you want to reduce the tds value, you could press the �onoff� button.