Review on Milwaukee Economy Portable Dissolved Calibration: Enhance Accuracy with Convenience by Dave Rasic

Very good professional quality device but instructions are lacking. I'm a field biologist used to working with various environmental measuring devices, but I found the instructions on how to calibrate, operate, and store this device to be confusing at best and non-existent at worst. There is a small additional instruction sheet for calibrating the device, which differs slightly from the included "instructions" (consisting of a small 5-page 5" x 6" booklet). In addition, the protective cap included in the kit is completely unsuitable for attaching to the diode. I contacted the company to hopefully clarify some of my questions and their website is fine as it has a video demonstrating some calibration methods but the FAQ section is boring. On the other hand, the device contains 2 spare membranes more than indicated in the product description and above all it accurately measures the DO in my carp pond.