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 international scientists, academic institutions and government agencies for their ease of use and the quality of data they provide. We provide high resolution measurement of electrical conductivity, temperature, dissolved oxygen, carbon dioxide, pressure, fluorescence and PAR concentration in water.