Try the miniDOT logger for yourself - free!


We have set aside some of our miniDOT oxygen temperature loggers as loaners for you to evaluate.  Fill out the form and ask to borrow one for a few weeks. 

We're Here to Help

The water measurement experts at PME are available to help further your research. If you have questions, we're here!

Why miniDOT?

The miniDOT logger is a completely submersible instrument that logs dissolved oxygen and temperature measurements. The oxygen sensor is an optode that measures dissolved oxygen concentration in water through a fluorescence method. Data are recorded to an internal SD card. Operation of the miniDOT logger such as setting the time and sample interval can be accomplished via the USB cable.

Request your miniDOT today!


The miniDOT logger measures dissolved oxygen in water and is completely self contained. It includes an optical DO sensor, a temperature sensor, batteries and a micro SD memory card. The logger collects measurements of dissolved oxygen with an accuracy of +/- 5% and temperature to +/- 0.1 degrees C. All measurements are stored internally. Data can be offloaded to a computer via the miniDOT USB cable. Temperature range is 0 to 30 degrees C with an accuracy of +/- 0.1 degrees C. Oxygen range is 0 to 150% saturation with an accuracy of +/- 10 umole/L.

Stable calibration
Records time, date, and battery voltage
Anti-fouling available

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Crafting high-performing environmental monitoring instruments for over thirty years.