Unleashing Performance: The Power of Silicon-on-Sapphire Pressure Sensing Technology

In the demanding world of industrial and scientific measurement, the accuracy, stability, and durability of pressure sensors are paramount. When faced with extreme temperatures, harsh environments, or the critical need for intrinsic safety, traditional sensor technologies often fall short. This is where Silicon-on-Sapphire pressure sensing technology emerges as a game-changer, offering unparalleled performance and reliability. At ESI Technology, we’ve harnessed this advanced innovation to create a range of pressure measurement solutions that set the industry standard.

What is Silicon-on-Sapphire (SoS) Technology?

The journey of Silicon-on-Sapphire pressure sensing technology began with ambitious goals, initially utilised in the advancement of high-temperature integrated circuits for the NASA space programme. This heritage speaks volumes about its inherent robustness and capability to perform in challenging conditions.

At its core, SoS technology involves growing a thin layer of silicon onto a sapphire substrate. Unlike conventional silicon-based sensors, which are often prone to residual stresses introduced during processing, the sapphire substrate provides a superior foundation. Sapphire, a crystalline form of aluminium oxide, possesses exceptional properties:

• Excellent Elasticity and Repeatability: The ability of sapphire to bend and return precisely to its original position makes it ideal for sensors requiring high repeatability over extended periods. This is a highly desirable characteristic for accurate and consistent pressure measurement.
• High Temperature Stability: Sapphire maintains its structural integrity and electrical insulating properties across a very broad temperature range, allowing SoS sensors to operate reliably in environments where other technologies would fail.
• Chemical Inertness: Sapphire is highly resistant to chemical corrosion, making SoS sensors suitable for use with aggressive media often found in industrial processes.
• Superior Insulating Properties: The electrical insulation provided by sapphire minimises parasitic effects, leading to a cleaner and more stable signal.

ESI Technology has taken this foundational technology and developed sophisticated sensors capable of accurately measuring pressure (as well as vibration, torque, or force) in extreme temperatures over long periods. This continuous innovation is why Silicon-on-Sapphire pressure sensing technology is at the forefront of our product portfolio.

SoS in Hazardous Environments: The Intrinsically Safe Advantage

One of the most critical applications where Silicon-on-Sapphire pressure sensing technology truly shines is in hazardous zones. Explosive atmospheres, caused by flammable gases, mists, vapours, or combustible dusts, pose significant risks of explosions, leading to major damage, serious injury, and even loss of life. Using the correct intrinsically safe equipment is not just a recommendation; it’s a significant factor in preventing such catastrophes.

Intrinsic safety (IS) is a protection technique for safe operation of electrical equipment in hazardous areas by limiting the energy available for ignition. ESI Technology has integrated our proven Silicon-on-Sapphire pressure sensing technology into a comprehensive range of intrinsically safe transmitters.

ATEX and IECEx Certification: Ensuring Safety and Compliance

ATEX is the widely recognised framework for controlling explosive atmospheres within the European Union, while IECEx provides a global standard. These regulations apply to all equipment intended for use in hazardous zones, whether mechanical or electrical. Intrinsically safe equipment must undergo rigorous testing and approval by independent bodies to assure its safety. This involves a detailed process of examination, testing, and assessment of the equipment, culminating in the issuance of an ATEX or IECEx certificate.

ESI Technology is proud to have an extensive range of intrinsically safe Silicon-on-Sapphire pressure sensing technology transmitters, all ATEX approved to EEx ia IIC T4 standards by SIRA, a world leader in conformity assessments. This certification confirms that our products are safe to use within potentially explosive environments, offering peace of mind and ensuring compliance with the strictest safety regulations.

A Versatile Solution for Diverse Applications

The inherent advantages of Silicon-on-Sapphire pressure sensing technology make it incredibly versatile, suitable for a vast array of demanding applications across numerous industries. ESI Technology’s range of SoS transmitters includes solutions for:

• High Pressure Measurement: Capable of precise measurement up to 5,000 bar (72,500 psi).
• High Accuracy Applications: Delivering exceptional precision for critical measurements.
• Absolute and Differential Pressure: Covering a broad spectrum of pressure types.
• Submersible Applications: Designed for reliable operation in challenging liquid environments.
• Hygienic Applications: Meeting the stringent cleanliness and material requirements of food, beverage, and pharmaceutical industries.
• Rugged Oil & Gas Transmitters: Built to withstand the harsh conditions of upstream and downstream operations.
• Hydrogen Compatible: Our newest range of pressure measurement equipment specifically designed and tested for the emerging hydrogen market.

Incorporating SoS into applications where ATEX approval is required offers a reliable, durable solution with unbeatable performance and value.

Quality and Experience You Can Trust

Founded in 1984, ESI Technology has evolved into a worldwide leader in designing and manufacturing “in-house” pressure measurement solutions. Our initial success designing solutions for challenging military and aerospace applications laid the groundwork for our global presence today. Driven by Silicon-on-Sapphire pressure sensing technology, we’ve solidified our position as a market leader, showcasing our unwavering commitment to innovation and quality.

All our products undergo rigorous testing in accordance with ISO9001 and Mil-I-45208 procedures, ensuring unparalleled performance. We’re proud to uphold CE requirements and provide EX, IECEx, and DNV GL certifications for extra assurance.

For over 30 years, ESI Technology, now part of the SUCO Group, has served customers with consistent product development, engineered solutions, and excellent technical support. Our primary focus is to provide an outstanding service by offering an expansive product portfolio together with a wide scope of additional services.

To learn more about how our Silicon-on-Sapphire pressure sensing technology can elevate your pressure measurement capabilities, please visit our website, call 01978 262255, or email us for more details.