the only high-volume sampler on the market to comply with OOOOb and ACR methodologies


a replacement for the obsolete Bacharach HI FLOW

Our fugitive methane analyzer is the latest entry in Sensors Emissions Measurement Technology (SEMTECH) family. Sensors’ fugitive methane analyzer brings to bear our emission measurement experience into the oil and gas industry with a focus on leak detection and repair (LDAR).

Sensors, Inc. is proud to present the latest in direct quantification of leaks in the 0.0005 to 25 CFM (0.015 to 700 lpm) range with accuracy better than 5%. This device uses state-of-the-art flow and gas sensing technologies that are integrated into a handheld unit for accurate measurement during established LDAR programs.

The SEMTECH HI-FLOW 2 is a robust, portable, battery powered, high volume sampler for the accurate quantification of fugitive methane emissions, comprising:

  • Sampler - Handheld device with a high-volume vacuum sampling fan and total flowrate monitor
  • Analyzer - Portable control module (which can be carried, placed on the floor, or mounted to a backpack) housing the gas sensor technologies, control electronics, and battery pack

The combination of these two components (with a variety of sampling adapters) allows the entire fugitive methane emission to be captured, diluted, and quantified accurately.

HI-FLOW 2 utilizes state-of-the-art Tunable Diode Laser Absorption Spectroscopy (TDLAS) and a high-output fan which together facilitates 3-5x lower detection limit (0.0005 CFM) and a 3x increase in maximum leak rate (25 CFM) when compared to the historical Bacharach device. SEMTECH’s TDLAS tuned specifically to methane (unlike non-dispersive spectroscopy techniques) eliminates the known problems of interferences from other gases present in up, down and mid-stream. Moreover, our HI‑FLOW 2 addresses potential poisoning and saturation of nonoptical-based low-cost sensors.