Displayed unit, DO Meter is pen shape, designed to measure dissolved oxygen quickly anywhere in lab or outside on fields. Just insert batteries, attach sensor and measure DO range of the sample.
Displayed unit is factory calibrated; hence, no need calibration before use very first time. Using again needs calibration, the process is explained in the manual given with the unit.
For more information please visit: http://www.panomex.com/do-meters/index.html
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