Partial Discharge Detection System

Partial Discharge Detection System Market Outlook

The global Partial Discharge Detection System market was valued at approximately USD 1.5 billion in 2023, with a projected compound annual growth rate (CAGR) of around 6.5% from 2025 to 2035. The increasing focus on preventive maintenance in electrical systems, coupled with the rising demand for sustainable energy solutions, are key factors propelling market growth. Accurate detection of partial discharge allows for timely intervention, thereby reducing equipment failure rates and enhancing the lifespan of high-voltage apparatus. The surge in investments in power infrastructure, particularly in developing nations, is also expected to significantly boost the market share for partial discharge detection systems. Moreover, the advancements in technology, such as the integration of IoT and AI for predictive maintenance, provide a promising avenue for market expansion.

Growth Factor of the Market

The growth of the Partial Discharge Detection System market can be attributed to several factors, including the increasing need for reliable energy systems and the growing emphasis on equipment safety. As utility companies and industries strive to reduce downtime and maintenance costs, the demand for effective monitoring tools has risen sharply. Moreover, advancements in detection technologies, such as optical and acoustic emission methods, have made it possible to detect partial discharges with high accuracy, further driving market growth. The expanding renewable energy sector, which necessitates robust monitoring of high-voltage equipment, is another key driver. Additionally, government regulations aimed at improving electrical safety standards compel utility providers and industries to invest in partial discharge detection systems.

Key Highlights of the Market

• Significant growth projected with a CAGR of 6.5% from 2025-2035.
• Increased investments in power infrastructure in emerging economies.
• Technological advancements enhancing detection accuracy and reliability.
• Growing adoption of preventive maintenance practices in utilities and industries.
• Regulatory pressures driving demand for safety-compliant monitoring solutions.

By Product Type

Portable Partial Discharge Detection Systems:

Portable Partial Discharge Detection Systems are designed for on-site inspections and monitoring of electrical equipment. These systems offer flexibility and ease of use, making them ideal for maintenance teams that require mobility. Their compact design allows them to be transported easily between different sites, providing real-time data collection and analysis. The increasing awareness regarding the importance of regular inspections in improving equipment reliability and operational efficiency is driving the adoption of portable systems. Furthermore, advancements in battery technologies have significantly enhanced the performance of these portable devices, allowing for longer operating times and improved accuracy in partial discharge detection.

Fixed Partial Discharge Detection Systems:

Fixed Partial Discharge Detection Systems are permanently installed in electrical substations and facilities to provide continuous monitoring. These systems are crucial for large-scale operations where downtime can lead to significant financial losses. By employing various detection methods such as electrical and ultrasonic techniques, these systems create a comprehensive overview of the equipment's health status. The growing trend towards automation in industrial processes has increased the demand for fixed monitoring solutions, as they can be integrated with existing supervisory control and data acquisition (SCADA) systems for real-time data analysis and reporting. As industries increasingly prioritize equipment maintenance, the market for fixed systems continues to expand.

Online Monitoring Systems:

Online Monitoring Systems provide continuous real-time data, allowing for immediate identification and assessment of partial discharge activities in high voltage equipment. These systems often use cloud-based solutions for data storage and analysis, enabling remote access and monitoring from anywhere in the world. The integration of artificial intelligence and machine learning technologies into online monitoring systems enhances predictive capabilities, allowing for proactive maintenance strategies. As utilities and industries become more reliant on data-driven decision-making, the demand for online monitoring systems is expected to grow significantly. This transition towards smart monitoring solutions is a major trend that reflects the industry's shift towards digitalization.

Offline Monitoring Systems:

Offline Monitoring Systems are employed for periodic assessments of electrical equipment, allowing for the detection of partial discharges during scheduled maintenance. These systems typically involve diagnostic testing and analysis of captured data, which can provide insights into potential issues that may lead to equipment failures. The increasing adoption of scheduled maintenance programs in various industries is driving the demand for offline monitoring systems. These systems are often used in conjunction with other diagnostic tools to provide a holistic view of the equipment's health, making them essential in ensuring reliability and longevity of high-voltage assets.

Non-Intrusive Partial Discharge Detection Systems:

Non-Intrusive Partial Discharge Detection Systems are designed to monitor equipment without requiring direct access or modifications to the electrical installations. These systems utilize various detection methods, including ultrasonic and electromagnetic techniques, to assess the condition of high-voltage equipment. The non-intrusive nature of these systems makes them particularly advantageous for facilities where equipment cannot be taken offline. As industries increasingly recognize the benefits of minimal disruption and operational continuity, the demand for non-intrusive systems is projected to rise. Furthermore, advancements in sensor technologies are enhancing the effectiveness of these solutions, contributing to their growing popularity in the market.

By Application

Power Transformers:

Power transformers are critical components in electrical networks, and their reliability is paramount for uninterrupted power supply. Partial discharge detection systems play a vital role in monitoring the condition of power transformers, identifying insulation weaknesses, and preventing catastrophic failures. The increasing complexity of power transformer systems, along with the rising demand for electricity, has amplified the necessity for effective monitoring solutions. As utilities expand their infrastructures to meet growing energy demands, the adoption of partial discharge detection systems in power transformers is expected to increase significantly. The ability to conduct timely maintenance based on detection results can help in prolonging the lifespan of these essential components.

Gas Insulated Switchgear:

Gas Insulated Switchgear (GIS) is widely used in modern electrical systems due to its compact design and reliability. The use of partial discharge detection systems in GIS applications is crucial given the high voltage levels and confined spaces typical of these installations. By detecting partial discharge activity, utility companies can assess the insulation integrity of GIS and implement maintenance strategies to mitigate potential risks. As urbanization and infrastructure development continue to rise, the demand for GIS solutions is also increasing, thereby driving the need for effective detection systems. The trends of smart grids and automation in power distribution are likely to further boost the adoption of partial discharge detection in GIS.

Cables & Accessories:

Cables and their accessories are vital for transmitting electricity in various applications, making their reliability critical for operational efficiency. Partial discharge detection systems are used to monitor the condition of cables, identifying issues that could lead to failures or outages. With the growing focus on renewable energy sources and the expansion of power transmission networks, the demand for monitoring solutions for cables and their accessories is set to rise. Furthermore, as industries increasingly rely on extensive cabling infrastructures, the need for advanced detection systems to ensure safety and reliability is becoming more pronounced. This factor is expected to significantly contribute to the growth of this segment in the market.

Rotating Machines:

Rotating machines, such as generators and motors, are integral to various industrial processes and require regular monitoring to ensure optimal performance. Partial discharge detection systems are essential in assessing the health of these machines, enabling early detection of insulation breakdowns that can lead to operational failures. With the increasing automation of industries and the reliance on high-performance machinery, the demand for effective monitoring solutions in this segment is expected to grow. The emphasis on predictive maintenance strategies, driven by the need to minimize downtime and repair costs, is propelling the adoption of partial discharge detection systems for rotating machines.

Other High Voltage Equipment:

This category encompasses a wide range of high voltage equipment, including surge arresters and capacitors, all of which require effective monitoring to ensure operational reliability. Partial discharge detection systems play a critical role in maintaining the integrity of these components by providing valuable insights into their condition. As the global demand for electricity continues to rise, the need for robust monitoring solutions for high voltage equipment becomes increasingly crucial. Industries are placing a greater emphasis on risk management and safety protocols, further driving the adoption of partial discharge detection systems across various types of high voltage equipment. This trend is likely to fuel overall market growth in the coming years.

By Detection Method

Ultrasonic Detection:

Ultrasonic Detection is a widely used method for identifying partial discharges in electrical equipment. This technique relies on capturing high-frequency sound waves produced by partial discharges, which are then analyzed to determine the severity of the insulation problem. The non-invasive nature of ultrasonic detection makes it suitable for various applications, including substations and industrial facilities. As the technology continues to evolve, improvements in sensor sensitivity and data processing capabilities are enhancing the accuracy of ultrasonic detection systems. The increasing awareness of the importance of early fault detection is driving the adoption of this method in the market.

Radio Frequency Detection:

Radio Frequency Detection involves capturing electromagnetic waves emitted during partial discharge events. This method is beneficial for monitoring large-scale electrical systems, as it can provide comprehensive data without direct contact with equipment. The ability to detect early signs of insulation failure through radio frequency monitoring is crucial for implementing timely maintenance strategies. As industries aim to enhance operational reliability and reduce downtime, the adoption of radio frequency detection systems is expected to grow. The method's compatibility with modern communication technologies further supports its increasing prevalence in the Partial Discharge Detection System market.

Electrical Detection:

Electrical Detection methods are based on analyzing current and voltage waveforms to identify partial discharge activities. This approach provides valuable insights into the electrical characteristics of equipment and is often used in conjunction with other detection methods for a comprehensive assessment. As industries adopt more sophisticated monitoring strategies, the demand for electrical detection systems is expected to rise. The continuous advancements in sensor technologies are enhancing the precision of electrical detection methods, making them a reliable choice for monitoring insulation health. This trend aligns with the industry’s commitment to improving maintenance practices and ensuring equipment reliability.

Acoustic Emission Detection:

Acoustic Emission Detection is a technique that focuses on capturing stress waves generated by partial discharges within insulating materials. This method is particularly effective in identifying insulation breakdowns at an early stage, enabling timely interventions. The ability to monitor equipment in real-time using acoustic emission detection systems is driving the adoption of this method across various applications. As industries prioritize proactive maintenance and risk management, the demand for acoustic emission detection is set to increase. The development of advanced signal processing algorithms is further enhancing the effectiveness of this method, contributing to its growth in the Partial Discharge Detection System market.

Optical Detection:

Optical Detection methods utilize high-speed cameras and sensors to capture light emissions associated with partial discharges. This technique provides a visual representation of discharge events, enabling detailed analysis and assessment of insulation conditions. Optical detection is gaining traction due to its non-intrusive nature and the wealth of data it can generate. As industries increasingly adopt advanced monitoring technologies, the demand for optical detection systems is expected to grow. The integration of optical detection with other monitoring methods enhances overall system performance and provides a comprehensive understanding of partial discharge phenomena. This trend is becoming a key factor in promoting the adoption of optical detection in the market.

By User

Utilities:

Utilities are among the primary users of Partial Discharge Detection Systems, as these solutions play a critical role in ensuring the reliability and safety of power distribution networks. With the increasing demand for electricity and the expansion of power infrastructure, utilities are compelled to invest in monitoring systems that can predict equipment failures and minimize downtime. Partial discharge detection allows utilities to proactively manage their assets, ensuring continuous supply and operational efficiency. The growing trend towards smart grids and the integration of IoT technologies are further driving the adoption of detection systems within the utilities sector. As regulatory pressures for safety and reliability rise, the demand for these systems in utilities is expected to grow.

Industries:

Industries, particularly those that rely on high-voltage equipment, are significant users of Partial Discharge Detection Systems. The need for continuous operation and minimal downtime necessitates the implementation of effective monitoring solutions to prevent equipment failures. Industries such as manufacturing, chemical processing, and oil and gas are increasingly recognizing the importance of partial discharge detection in maintaining operational integrity. The growing emphasis on preventive maintenance strategies is driving the adoption of these systems across sectors. As companies strive to enhance productivity and reduce maintenance costs, the demand for partial discharge detection systems in industrial applications is projected to rise.

OEMs:

Original Equipment Manufacturers (OEMs) are critical players in the Partial Discharge Detection System market, as they incorporate these solutions into their products for enhanced reliability and safety. By integrating partial discharge detection capabilities, OEMs can offer additional value to their customers, ensuring that equipment operates efficiently and safely. The growing trend towards energy-efficient technologies is encouraging OEMs to adopt advanced monitoring solutions, thereby increasing the demand for detection systems. As competition intensifies, manufacturers are focusing on innovation and the development of smart monitoring solutions, further driving the growth of the market in the OEM segment. This trend underscores the importance of partial discharge detection in the broader context of equipment design and manufacturing.

By Region

The North American Partial Discharge Detection System market is poised for significant growth, driven by stringent regulatory standards and a strong focus on infrastructure maintenance. The region, which accounted for approximately USD 600 million in 2023, is expected to grow at a CAGR of 7% over the forecast period. The presence of established utility companies and a robust industrial sector further bolster the demand for advanced monitoring solutions. Furthermore, the increasing investments in the modernization of aging power grids are likely to contribute to the expansion of the market in North America, as utilities seek to enhance reliability and reduce operational risks.

In Europe, the Partial Discharge Detection System market is also experiencing notable growth, primarily due to the aggressive implementation of renewable energy projects and the European Union's focus on improving energy efficiency. With a market valuation of around USD 500 million in 2023, the region is anticipated to grow at a CAGR of 6% over the next decade. The shift towards digitalization in energy management and the growing emphasis on predictive maintenance strategies are driving the adoption of partial discharge detection systems in the European market. Additionally, the increasing promotion of smart grid technologies is expected to further accelerate market growth across various countries in the region.

Opportunities

The Partial Discharge Detection System market presents numerous opportunities for growth, particularly in emerging economies where infrastructure development is rapidly advancing. As countries invest in modernizing their electrical grids and increasing their energy generation capacities, the need for effective monitoring solutions becomes paramount. Companies that offer innovative detection technologies or customized solutions for specific applications can capitalize on this growing demand. Additionally, the integration of smart technologies, such as IoT and AI for data analysis, opens new avenues for enhancing the capabilities of partial discharge detection systems. By leveraging these advancements, businesses can improve their offerings and gain a competitive edge in an evolving marketplace.

Furthermore, the ongoing transition towards renewable energy sources creates additional growth opportunities within the Partial Discharge Detection System market. As wind, solar, and other renewable energy technologies become more prevalent, the need for robust monitoring solutions for associated high-voltage equipment will continue to rise. Companies that can develop specialized detection systems tailored to the unique requirements of renewable energy applications will be well-positioned to tap into this burgeoning market segment. Additionally, partnerships and collaborations with energy producers and utilities can facilitate market entry and expansion, further enhancing growth potential in the industry.

Threats

Despite the positive growth outlook, the Partial Discharge Detection System market faces several threats that can impact its expansion. One of the primary challenges is the increasing competition among manufacturers, which can lead to price wars and reduced profit margins. As more players enter the market with similar offerings, established companies may find it challenging to maintain their competitive advantage. This saturation can also hinder innovation, as companies may focus on cost-cutting measures instead of investing in research and development. Additionally, fluctuations in the global economy can impact investments in infrastructure, leading to reduced demand for monitoring solutions in certain regions.

Another potential threat to the market is the rapid pace of technological change, which can render existing products obsolete. As new detection methods and technologies emerge, companies that fail to adapt may struggle to remain relevant in the market. Ensuring that products meet evolving regulatory standards is also essential for manufacturers, as non-compliance can result in legal challenges and financial repercussions. Furthermore, the complexities associated with integrating advanced detection systems into existing infrastructure may deter some potential customers from making investments in these technologies. The cumulative effect of these threats could pose significant challenges to the future growth of the Partial Discharge Detection System market.

Competitor Outlook

• Siemens AG
• Schneider Electric SE
• General Electric Company
• Tektronix, Inc.
• Omicron Electronics
• GE Grid Solutions
• Megger Limited
• PD-TECH
• Haeckel GmbH
• ACE Research Co., Ltd.
• VLF Technologies, Inc.
• Electro Rent Corporation
• National Instruments Corporation
• Rohde & Schwarz GmbH & Co KG
• Fluke Corporation

The competitive landscape of the Partial Discharge Detection System market is characterized by the presence of several key players, each working to enhance their product offerings and establish a strong market presence. Major companies, including Siemens AG and Schneider Electric, are leveraging their extensive experience in electrical infrastructure to develop innovative detection solutions that meet the evolving needs of customers. These organizations often collaborate with utilities and industries to design tailored monitoring systems that optimize efficiency and reliability. Their commitment to research and development enables them to stay at the forefront of technological advancements, ensuring that they can offer cutting-edge solutions to their clients.

General Electric Company and Omicron Electronics are also notable competitors in this space, focusing on expanding their product portfolios and enhancing customer service. These companies provide a wide range of monitoring solutions that address various applications and industries, ensuring that they can cater to diverse customer requirements. By investing in smart technologies and predictive maintenance methodologies, GE and Omicron are positioning themselves as leaders in the market. Additionally, strategic partnerships with other technology providers allow them to enhance their capabilities and offer comprehensive solutions that integrate seamlessly with customers’ existing infrastructures.

Emerging players such as Megger Limited and Tektronix, Inc. are making significant strides in the market by offering specialized partial discharge detection systems tailored to specific applications. Their focus on innovation and customer-centric product development has garnered attention from industries seeking reliable monitoring solutions. By adopting advanced detection methods and investing in IoT technologies, these companies are enhancing their competitive positioning. As the market continues to grow and evolve, the ability to adapt to changing customer demands and technological advancements will be crucial for all players in the Partial Discharge Detection System market.

• 1 Appendix

  • 1.1 List of Tables
  • 1.2 List of Figures

• 2 Introduction

  • 2.1 Market Definition
  • 2.2 Scope of the Report
  • 2.3 Study Assumptions
  • 2.4 Base Currency & Forecast Periods

• 3 Market Dynamics

  • 3.1 Market Growth Factors
  • 3.2 Economic & Global Events
  • 3.3 Innovation Trends
  • 3.4 Supply Chain Analysis

• 4 Consumer Behavior

  • 4.1 Market Trends
  • 4.2 Pricing Analysis
  • 4.3 Buyer Insights

• 5 Key Player Profiles

  • 5.1 PD-TECH
    • 5.1.1 Business Overview
    • 5.1.2 Products & Services
    • 5.1.3 Financials
    • 5.1.4 Recent Developments
    • 5.1.5 SWOT Analysis
  • 5.2 Siemens AG
    • 5.2.1 Business Overview
    • 5.2.2 Products & Services
    • 5.2.3 Financials
    • 5.2.4 Recent Developments
    • 5.2.5 SWOT Analysis
  • 5.3 Haeckel GmbH
    • 5.3.1 Business Overview
    • 5.3.2 Products & Services
    • 5.3.3 Financials
    • 5.3.4 Recent Developments
    • 5.3.5 SWOT Analysis
  • 5.4 Megger Limited
    • 5.4.1 Business Overview
    • 5.4.2 Products & Services
    • 5.4.3 Financials
    • 5.4.4 Recent Developments
    • 5.4.5 SWOT Analysis
  • 5.5 Tektronix, Inc.
    • 5.5.1 Business Overview
    • 5.5.2 Products & Services
    • 5.5.3 Financials
    • 5.5.4 Recent Developments
    • 5.5.5 SWOT Analysis
  • 5.6 Fluke Corporation
    • 5.6.1 Business Overview
    • 5.6.2 Products & Services
    • 5.6.3 Financials
    • 5.6.4 Recent Developments
    • 5.6.5 SWOT Analysis
  • 5.7 GE Grid Solutions
    • 5.7.1 Business Overview
    • 5.7.2 Products & Services
    • 5.7.3 Financials
    • 5.7.4 Recent Developments
    • 5.7.5 SWOT Analysis
  • 5.8 Omicron Electronics
    • 5.8.1 Business Overview
    • 5.8.2 Products & Services
    • 5.8.3 Financials
    • 5.8.4 Recent Developments
    • 5.8.5 SWOT Analysis
  • 5.9 Schneider Electric SE
    • 5.9.1 Business Overview
    • 5.9.2 Products & Services
    • 5.9.3 Financials
    • 5.9.4 Recent Developments
    • 5.9.5 SWOT Analysis
  • 5.10 ACE Research Co., Ltd.
    • 5.10.1 Business Overview
    • 5.10.2 Products & Services
    • 5.10.3 Financials
    • 5.10.4 Recent Developments
    • 5.10.5 SWOT Analysis
  • 5.11 VLF Technologies, Inc.
    • 5.11.1 Business Overview
    • 5.11.2 Products & Services
    • 5.11.3 Financials
    • 5.11.4 Recent Developments
    • 5.11.5 SWOT Analysis
  • 5.12 Electro Rent Corporation
    • 5.12.1 Business Overview
    • 5.12.2 Products & Services
    • 5.12.3 Financials
    • 5.12.4 Recent Developments
    • 5.12.5 SWOT Analysis
  • 5.13 General Electric Company
    • 5.13.1 Business Overview
    • 5.13.2 Products & Services
    • 5.13.3 Financials
    • 5.13.4 Recent Developments
    • 5.13.5 SWOT Analysis
  • 5.14 Rohde & Schwarz GmbH & Co KG
    • 5.14.1 Business Overview
    • 5.14.2 Products & Services
    • 5.14.3 Financials
    • 5.14.4 Recent Developments
    • 5.14.5 SWOT Analysis
  • 5.15 National Instruments Corporation
    • 5.15.1 Business Overview
    • 5.15.2 Products & Services
    • 5.15.3 Financials
    • 5.15.4 Recent Developments
    • 5.15.5 SWOT Analysis

• 6 Market Segmentation

  • 6.1 Partial Discharge Detection System Market, By User
    • 6.1.1 Utilities
    • 6.1.2 Industries
    • 6.1.3 OEMs
  • 6.2 Partial Discharge Detection System Market, By Application
    • 6.2.1 Power Transformers
    • 6.2.2 Gas Insulated Switchgear
    • 6.2.3 Cables & Accessories
    • 6.2.4 Rotating Machines
    • 6.2.5 Other High Voltage Equipment
  • 6.3 Partial Discharge Detection System Market, By Product Type
    • 6.3.1 Portable Partial Discharge Detection Systems
    • 6.3.2 Fixed Partial Discharge Detection Systems
    • 6.3.3 Online Monitoring Systems
    • 6.3.4 Offline Monitoring Systems
    • 6.3.5 Non-Intrusive Partial Discharge Detection Systems
  • 6.4 Partial Discharge Detection System Market, By Detection Method
    • 6.4.1 Ultrasonic Detection
    • 6.4.2 Radio Frequency Detection
    • 6.4.3 Electrical Detection
    • 6.4.4 Acoustic Emission Detection
    • 6.4.5 Optical Detection

• 7 Competitive Analysis

  • 7.1 Key Player Comparison
  • 7.2 Market Share Analysis
  • 7.3 Investment Trends
  • 7.4 SWOT Analysis

• 8 Research Methodology

  • 8.1 Analysis Design
  • 8.2 Research Phases
  • 8.3 Study Timeline

• 9 Future Market Outlook

  • 9.1 Growth Forecast
  • 9.2 Market Evolution

• 10 Geographical Overview

  • 10.1 Europe - Market Analysis
    • 10.1.1 By Country
      • 10.1.1.1 UK
      • 10.1.1.2 France
      • 10.1.1.3 Germany
      • 10.1.1.4 Spain
      • 10.1.1.5 Italy
  • 10.2 Asia Pacific - Market Analysis
    • 10.2.1 By Country
      • 10.2.1.1 India
      • 10.2.1.2 China
      • 10.2.1.3 Japan
      • 10.2.1.4 South Korea
  • 10.3 Latin America - Market Analysis
    • 10.3.1 By Country
      • 10.3.1.1 Brazil
      • 10.3.1.2 Argentina
      • 10.3.1.3 Mexico
  • 10.4 North America - Market Analysis
    • 10.4.1 By Country
      • 10.4.1.1 USA
      • 10.4.1.2 Canada
  • 10.5 Middle East & Africa - Market Analysis
    • 10.5.1 By Country
      • 10.5.1.1 Middle East
      • 10.5.1.2 Africa
  • 10.6 Partial Discharge Detection System Market by Region

• 11 Global Economic Factors

  • 11.1 Inflation Impact
  • 11.2 Trade Policies

• 12 Technology & Innovation

  • 12.1 Emerging Technologies
  • 12.2 AI & Digital Trends
  • 12.3 Patent Research

• 13 Investment & Market Growth

  • 13.1 Funding Trends
  • 13.2 Future Market Projections

• 14 Market Overview & Key Insights

  • 14.1 Executive Summary
  • 14.2 Key Trends
  • 14.3 Market Challenges
  • 14.4 Regulatory Landscape

Segments Analyzed in the Report

The global Partial Discharge Detection System market is categorized based on

By Product Type

• Portable Partial Discharge Detection Systems
• Fixed Partial Discharge Detection Systems
• Online Monitoring Systems
• Offline Monitoring Systems
• Non-Intrusive Partial Discharge Detection Systems

By Application

• Power Transformers
• Gas Insulated Switchgear
• Cables & Accessories
• Rotating Machines
• Other High Voltage Equipment

By Detection Method

• Ultrasonic Detection
• Radio Frequency Detection
• Electrical Detection
• Acoustic Emission Detection
• Optical Detection

By User

• Utilities
• Industries
• OEMs

By Region

• North America
• Europe
• Asia Pacific
• Latin America
• Middle East & Africa

Key Players

• Siemens AG
• Schneider Electric SE
• General Electric Company
• Tektronix, Inc.
• Omicron Electronics
• GE Grid Solutions
• Megger Limited
• PD-TECH
• Haeckel GmbH
• ACE Research Co., Ltd.
• VLF Technologies, Inc.
• Electro Rent Corporation
• National Instruments Corporation
• Rohde & Schwarz GmbH & Co KG
• Fluke Corporation