Robust, low-cost data loggers for stream temperature, flow intermittency, and relative conductivity monitoring

Water temperature and stream flow intermittency are critical parameters influencing aquatic ecosystem health. Low-cost temperature loggers have made continuous water temperature monitoring relatively simple, but determining stream flow timing and intermittency using temperature data alone requires significant and subjective data interpretation.

Electrical resistance (ER) sensors have recently been developed to overcome the major limitations of temperature-based methods for the assessment of streamflow intermittency. This technical note introduces the STIC (Stream Temperature, Intermittency, and Conductivity logger); a robust, low-cost, simple-to-build instrument that provides long-duration, high-resolution monitoring of both relative conductivity (RC) and temperature.