ESI Technology Ltd

ESI Technology Ltd is an established UK-based designer and manufacturer of precision pressure sensors, transducers and transmitters, trusted across aerospace, defence, oil & gas, subsea, hydrogen, industrial and general process markets. The company’s products are distinguished by advanced Silicon-on-Sapphire (SOS) pressure sensing technology, which delivers high accuracy, excellent thermal stability and durability even under extreme conditions. ESI’s solutions are built and tested to meet rigorous industry demands and carry key global certifications including ATEX, IECEx (for hazardous area use) and DNV (for marine and offshore applications). It also holds AS9100D certification, reflecting robust quality management for aerospace and safety-critical applications.

ESI Technology’s product portfolio spans a comprehensive range of pressure measurement solutions designed for performance in the world’s most demanding environments. The company manufactures high-pressure, low-pressure and differential pressure transmitters, along with subsea, hydrogen-compatible and high-accuracy variants. Flush diaphragm designs are available for viscous media, while bespoke configurations can be engineered for unique mechanical, electrical or environmental requirements.

Products are offered with analogue and digital outputs, supporting seamless integration into control, monitoring and data acquisition systems. For hazardous or explosive atmospheres, intrinsically safe options are available with ATEX and IECEx approvals. Marine and offshore applications are supported through DNV certification, while aerospace and defence programmes benefit from AS9100D quality assurance and rigorous traceability standards.

In addition to standard catalogue products, ESI provides custom-engineered sensing solutions developed in close collaboration with customers, combining Silicon-on-Sapphire technology with robust stainless steel and titanium constructions to ensure long-term stability, repeatability and reliability under extreme pressure and temperature conditions. Products can be tailored for specific process connections and industry requirements, supported by rigorous calibration and quality assurance practices that have built ESI’s reputation over decades.

From OEM integration to complex system installations, ESI Technology delivers precision pressure measurement solutions trusted worldwide.