Trade Message Trade Message > Sell - sell water purity test pen click for larger photo sell water purity test pen Publish Date  2008 / 05 / 27 Expiry Date  2008 / 08 / 25 Full Description Sell - sell water purity test pen ÍðIdentifies the quality of drinking water ¹Ùwithin three seconds Tests the degree of secondary pollution in the water dispenser Tests the degree of pollution on secondary water supply Tests the irons, bacterium and toxic elements in the water quickly Environment temperature: 5 < =T < =50 ¹Ù¹Ù¹Ù¹ÙRelative humidity of environment: < =95 Powered by DIYTrade.com