Wells can have multiple locations of infiltration and exfiltration as they traverse fractures, aquifers or oil reservoirs with varying pressures, and material with varying permeability.  Conventional methods to investigate this can be laborious, offer limited spatial resolution, and provide information only at a point in time.

SelkerMetrics developed a patented sensing cable that combines distributed temperature sensing and hundreds of small point-heaters.  Each heater creates a small thermal plume which reveals the direction and rate of flows at that location.   This allows measuring flows continuously and with high spatial resolution.