¡éÒ¹ÇÑ´¡Ã´ ´èÒ§ pH Test Strip pH-Fix 1.7-3.8 ºÃèءÅèͧÅÐ 100 ¡éÒ¹ Always ready for use pH-Fix test strips are used for rapid pH testing directly at the point of interest. They are always ready for immediate use. Coming with a complete color chart they are readily calibrated. As single use devices they are completely maintenance free. For careful testing of dangerous, poisonous or aggressive liquids the strips have the optimal design. The longest available handle effectively protects the user from contact with the sample. This increases the safety of operation and adds handling ease.