Milwaukee Economy Portable Dissolved Calibration: Enhance Accuracy with Convenience Review

The best dissolved oxygen sensor for teaching with water quality test. I have used several of these sensors 5 times a day, once a week for over two months. They last for years. The first lasted about 7 years before needing to be replaced. Calibration is rarely required.

This meter is very accurate once you get the hang of it, which is not easy. Differences in movement speed and type of movement result in different gauges. I eventually found that holding it still near the area where the water was moving was the most stable and accurate way to get readings.

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…