SEMTECH^® HI‑FLOW 2 Powers Breakthrough in Accurate Emission Factors for EPA Subpart W GHGRP

July 30, 2025
By: Sean Epps, Heath Consultants

In a groundbreaking 2024 study—"Developing Specific Emission Factors for Natural Gas Driven Pneumatic Devices"—led by Clay Bell, researchers used the HI‑FLOW 2 to directly measure methane emissions from over 390 pneumatic devices at active natural gas production sites.

Why this matters for operators, auditors, and ESG leaders:

Validated alternative to Subpart W default factors:
The study showed that real-world emissions—measured with the HI‑FLOW 2—were significantly lower than EPA’s default factors for functioning devices. This opens the door to GHGRP-compliant, operator-specific emission factors under 40 CFR Part 98 Subpart W.

Supports defensible, reportable, and auditable data:
The HI‑FLOW 2 provides direct flow and methane concentration measurements with traceability, calibration compliance, and >95% capture accuracy—perfectly aligned with Subpart W methodologies.

Enables proactive compliance + ESG performance:
By identifying and quantifying emissions from malfunctioning devices, operators gain actionable insight for leak reduction, targeted maintenance, and improved methane intensity metrics—a growing investor expectation.

Bottom Line:
The SEMTECH^® HI‑FLOW 2 is proving essential in moving beyond estimations—toward measured reality. This kind of work directly supports regulatory accuracy, climate reporting transparency, and net-zero goals.

Read the peer-reviewed study
Ready to upgrade your methane measurement strategy? Let’s talk.
[Link to HI‑FLOW 2 webpage]

Source: Sean Epps via LinkedIn