Review on Enhance Precision: Apera Instruments AI1113 Calibration Polyethylene for Accurate Measurements by Radney Taala

I have ordered a calibration kit with storage solution. The set was shipped quickly and well packaged and arrived within a few days. The presence of different colors in liquids makes work easier and reduces the possibility of errors. There are many solutions to my maintenance needs of a commercial pool surveillance system. The storage solution is also used for my ORP sensor. The pH 7.0 reference can also be used to test my Taylor Pool Daily Test Kit. The acid solution came with an extra foil seal to prevent leakage. good idea. This order was for two, so I'm giving the second one as a "gift" to a friend in the industry.