HI-FLOW 3 incorporates a suite of spectroscopy-based methane sensors combined with an integrated high-output sampling fan offering a maximum flowrate of 500 LPM and minimum leak dectection down to 0.025 LPM (1 g/hr). This is a significant increase in maximum leak rate detection compared to other available devices. Our suite of sensors includes a state of the art Tunable Diode Laser Absorption Spectroscopy (TDLAS) device and is tuned specifically to methane, eliminating interferences from other gases present in up-, mid-, and downstream oil and gas operations.