The global SF6 Gas Recovery Units market is experiencing robust growth, driven by increasing environmental concerns surrounding the potent greenhouse gas SF6 and stringent regulations aimed at minimizing its emissions. The market, currently estimated at $500 million in 2025, is projected to exhibit a Compound Annual Growth Rate (CAGR) of 7% from 2025 to 2033, reaching a value exceeding $900 million by 2033. This growth is fueled by the expanding adoption of gas-insulated switchgear (GIS) in power transmission and distribution infrastructure, particularly in rapidly developing economies across Asia-Pacific and the Middle East. Furthermore, the rising demand for efficient and reliable SF6 gas handling equipment in substations and laboratories is contributing to market expansion. Key market segments include fixed and movable SF6 gas recovery units, with applications spanning gas-insulated lines (GIL), substations, laboratories, and other specialized industrial settings. The market landscape is characterized by a mix of established players and emerging regional manufacturers. Companies like WIKA, DILO, and Haug Sauer Kompressoren are major players, benefiting from extensive experience and a strong global presence. However, several smaller, regional companies are also making inroads, particularly in the Asia-Pacific region, where the market growth is most substantial. While the increasing adoption of alternative gases presents a potential restraint, the crucial need for efficient and safe SF6 handling, coupled with ongoing technological advancements in recovery unit design and efficiency, positions the market for sustained growth. The ongoing focus on improving the sustainability of power grids and enhancing safety procedures further supports the market's positive outlook. Future growth will likely be influenced by the pace of technological innovation, stricter environmental regulations, and the evolving energy landscape globally.

Purpose: The mission of the Geometric Design Laboratory (GDL) is to support the Office of Safety Research and Development in research related to the geometric design of roadways and the impacts on safety. The GDL provides technical support to develop, maintain, and enhance tools for the safety evaluation of highway geometric design alternatives. This includes coordination of the Highway Safety Manual (HSM) with related tools, e.g., the Interactive Highway Safety Design Model (IHSDM) and SafetyAnalyst. The GDL supports the HSM through implementation of HSM methods in IHSDM software; by providing technical support to HSM users; by performing HSM-related technology facilitation; and by conducting HSM-related training and research.The GDL also contributes to Federal Highway Administration's (FHWA's) Roadway Safety Data Program (RSDP) initiatives to advance State and local safety data systems and safety data analyses by supporting the use of Geographic Information Systems (GIS) for advancing the quantification of highway safety (e.g., through the integration of GIS with highway safety analysis tools); and supports the Safety Training and Analysis Center (STAC) in its mission to assist the research community and State departments of transportation (DOTs) in using data from the second Strategic Highway Research Program's (SHRP2) Naturalistic Driving Study (NDS) and Roadway Information Database (RID).Laboratory Description: GDL staff focuses on the following tasks.Research: Support IHSDM, Highway Safety Manual, and other highway safety-related research efforts.Software Development: Support the full life cycle of IHSDM software development, including developing functional specifications; performing verification and validation of the models that are core IHSDM components; providing recommendations to the IHSDM software developer on all facets of the software (e.g., the graphical user interface, output/reporting); preparing IHSDM documentation; performing alpha testing of IHSDM software; and coordinating the beta testing of IHSDM software by end users. The GDL also helps coordinate the interaction of key players in IHSDM software development, including research contractors, software developers, end users, and commercial computer-aided design (CAD)/roadway design software vendors.Technology Facilitation: Support technology facilitation for the IHSDM and HSM. The GDL provides the sole source of technical support to IHSDM users and provides technical support to HSM users. GDL markets IHSDM and HSM to decisionmakers and potential end users, and participates in developing and delivering IHSDM/HSM training.Laboratory Capabilities: The staff of the GDL includes professionals with expertise in transportation engineering and familiarity with software development, which allows the GDL to support IHSDM development in various ways and to assume a unique coordination role. The GDL's transportation engineering expertise supports the laboratory's function of reviewing and assisting the development of the engineering models included in IHSDM for evaluating the safety of roadway designs. By combining transportation engineering and software development expertise, the GDL has the unique ability to evaluate software from both the software developer and end-user perspective.Communications and engineering skills help GDL staff to understand the needs of the audience (e.g., design engineers), thereby supporting effective technical assistance to end users.IHSDM development is a long-term effort, involving many research contractors, software developers, and FHWA staff. In addition, FHWA seeks input from end users and user organizations to help ensure that IHSDM is responsive to user needs. The staff of the GDL helps coordinate the interaction of all those involved with IHSDM development.Staff at the GDL participates in HSM development and technology facilitation. In addition, the IHSDM Crash Prediction Module is a faithful implementation of HSM Part C (Predictive Method). Therefore, GDL staff is well equipped to support HSM-related activities.Laboratory Equipment: The GDL is equipped with computer hardware and software typically employed by users of IHSDM, including commercial CAD/roadway design software.Laboratory Services: The GDL supports the HSM through implementation of HSM methods in IHSDM software; by providing technical support to HSM users; by performing HSM-related technology facilitation; and by conducting HSM-related research.To develop and promote IHSDM, GDL staff provides or has provided the following services:For all IHSDM safety evaluation modules (Crash Prediction, Design Consistency, Intersection Review, Policy Review, Traffic Analysis and Driver/Vehicle), the GDL conducts software testing to verify, validate, and evaluate the IHSDM software system and develops and/or finalizes the software's functional specifications.Participates in development and delivery of IHSDM training.Provides the sole source of technical assistance to IHSDM users ( ihsdm.support@dot.gov; 202-493-3407).Supports coordination and integration of IHSDM with civil design software packages.Develops, reviews, maintains, and enhances documentation for IHSDM users.Conducts technical reviews and prepares review comments on contract research deliverables.Provides technical support in the development, production, and dissemination of IHSDM-related marketing materials.Provides technical content for the IHSDM Web site.The GDL also contributes to FHWA Roadway Safety Data Program (RSDP) initiatives to advance State and local safety data systems and safety data analyses by supporting the use of GIS for advancing the quantification of highway safety; e.g., through the integration of GIS with highway safety analysis tools (including extraction of data from GIS for input to safety analyses and representation of safety analysis results in the GIS environment). Such contributions support efforts by State and local agencies to:Extract roadway geometrics from GIS/GPS data.Develop GIS-based tools for collecting roadway inventory data.Process data gathered using instrumented vehicles (e.g., LiDAR).Leverage GIS/GPS data for populating safety databases and performing safety analyses (e.g., safety management - HSM Part B, and crash prediction - HSM Part C). The GDL supports the Safety Training and Analysis Center (STAC) in assisting the research community and State DOTs in using data from the SHRP2 Naturalistic Driving Study (NDS) and Roadway Information Database (RID); e.g., by assessing analytical possibilities associated with GIS data linkages to the RID.

The global SF6 gas transmitter market is experiencing robust growth, driven by increasing demand for reliable and efficient gas monitoring solutions in various industries. The market size in 2025 is estimated at $150 million, exhibiting a Compound Annual Growth Rate (CAGR) of 7% during the forecast period (2025-2033). This growth is fueled by several key factors, including stringent environmental regulations aimed at reducing SF6 emissions, the rising adoption of gas-insulated substations (GIS) in power transmission and distribution networks, and the expanding laboratory testing sector requiring precise SF6 measurement capabilities. Furthermore, technological advancements leading to the development of more compact, cost-effective, and accurate SF6 transmitters are also contributing significantly to market expansion. Growth across various segments is projected to be uneven. The NDIR sensor type is anticipated to maintain a significant market share due to its established reliability and relatively lower cost compared to composite sensors. The Gas Insulated Line (GIL) application segment will continue its dominance, driven by the increasing installation of GIS in high-voltage power networks globally. However, the substation and laboratory segments are expected to experience faster growth rates due to growing environmental concerns and increasing research activities focused on SF6 gas management. Geographical growth will be influenced by infrastructural development in regions like Asia Pacific and significant regulatory changes in North America and Europe. While competitive pressures from various manufacturers exist, the market offers sufficient opportunity for companies specializing in high-quality, reliable, and innovative SF6 gas monitoring technology.

Dissolved Organic Carbon (DOC) concentration data for surface waters sampled near Thule AFB. Sites include North Mountain Stream (a periglacial stream disconnected from the GIS), North River (at the orange bridge on base), North River (at Shelter 5), North River (at the GIS), Fox Canyon (at the mouth), Fox Canyon (at the bridge along P-mountain road), Fox Canyon (at the GIS), Narssarssuk River (at the ford on Cape Athol Rd) and Green Valley.