Features The 4 electrolytic bars 2 iron bars 2 aluminum rods are 2 group positive and negative poles each group has a positive pole and negative pole It can test two different liquid at one time convenient to use Using this item can help you test all kind of impurities in water by shows different color There are 6 colors yellow green blue red white black to indicate the different object in water and only the yellow color shows that water is health Applicable industries water laboratories CDC the aquaculture industry hospitals swimming pools household tap water quality testing Specification Color BlackSize about 9 8cm x 2 5cm x 4cmCable Length 85cmVoltage AC 220VPlug Type According to different countries we will send the corresponding adapter Testing Analysis Results Black Heavy MetalsWhite lead zinc mercury inorganic dirtYellow Dissolved acids fluoride and other organic matterGreen Arsenic mercury lead copper sodiumBlue Bacteria carcinogens chemical fertilizers pesticides etc Red Iron rust and bacteria Testing Method 1 Preparing testing water get two 100 150ml white glasses one glass full of tap water and the other full of R O water Then put them on the desk side by side 2 Preparing for testing put the electrolyser lying on the glass plug in 220V power 3 Testing push the power switch of electrolyser into ON start to test 4 Normally the testing time is 30 seconds When it s over push the OFF button and take the ele