About Us
Thermal Developments International Ltd (TDI) is a UK-based manufacturer of hand-made platinum resistance temperature detectors (RTDs), trusted by metrology labs, OEMs, and industry leaders worldwide. With over 40 years of expertise, we specialise in producing high-precision temperature sensors designed to meet the most demanding applications.

Our detectors are built to exceed IEC 60751 tolerances, offering exceptional accuracy, stability, and reliability. Whether used in calibration, aerospace, energy, manufacturing, research, or medical applications, TDI elements are engineered for performance where precision matters most.

From one sensor to thousands, we support everything from small-batch prototyping to global production. Backed by a global network of distributors, we offer local expertise and responsive delivery worldwide.

Thermal Developments International Ltd

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Thermal Developments International Ltd

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