Electrical conductivity sensor data and open source, commercial, and open source/commercial hybrid sensor and data logger configurations used to calibrate sensors and collect specific conductance data.

A “sensor configuration” consists of an EC sensor (OS or Commercial), a data logger (OS or C), and a cable connecting the sensor to a data logger (length in meters, m; either 7.5 m or 30 m). An OS sensor configuration means that the data logger and sensor were developed using publicly available, OS hardware and software. A commercial sensor configuration means that the data logger and sensor were configured with commercial—and often proprietary—hardware and software. An OS-C hybrid sensor configuration means that 1) the data logger was developed using publicly available, OS hardware and software and 2) the sensor was configured with commercial hardware and software. A “narrow calibration” means that the sensor was calibrated with a 2-point calibration using 84 μS/cm and 1413 μS/cm EC calibration standards. A “wide calibration” means that the sensor was calibrated with a 2-point calibration using 84 μS/cm and 2060 μS/cm EC calibration standards. The data was used in our statistical analysis of the overall accuracy and precision of the open source (OS) Atlas EC sensor configurations ("Atlas", column 2) against all non-Atlas EC sensor configurations ("Other", column 2). EC, electrical conductivity; OS, open source; C, commercial; OS/C, open source/commercial hybrid; m, meters; NA, not applicable (i.e., not measured). EC measurements were temperature corrected to 25° C and recorded as specific conductance (SC, units in μS/cm). (CSV)