Precision Measurement Engineering, Inc. (PME) is a leading provider of freshwater and oceanographic research devices and aquatic environmental monitoring equipment. PME’s sensor loggers, real-time monitoring devices and laboratory equipment are trusted among scientists, academic institutions and government agencies for their ease of use and the quality of data they provide. We offer high-resolution measurements of dissolved oxygen, temperature, photosynthetically active radiation (PAR), chlorophyll, rhodamine WT dye, fluorescein dye, turbidity, CDOM/FDOM, phycocyanin optics (blue-green algae - freshwater), refined fuels/crude oil, tryptophan, and pressure.