Sensing Devices Ltd (SDL) has achieved a major technical milestone with the dual Ex certification (Ex ia and Ex eb) of its Stator Winding Resistance Temperature Detectors (RTDs). This accomplishment broadens the operational scope of SDL’s temperature sensors, ensuring dependable performance in hazardous and explosive atmospheres while meeting the stringent requirements of ATEX, IECEx, and international safety standards.
It also reinforces SDL’s long-standing commitment to quality management (ISO 9001) and product traceability, supported by rigorous inspection, insulation resistance testing, and calibration traceable to national standards (UKAS/NIST), ensuring reliability under the most demanding electrical and thermal conditions.
Technical Expansion of Safety Compliance
The dual certification demonstrates full compliance with IEC 60079-0, IEC 60079-7 (Ex eb), and IEC 60079-11 (Ex ia) standards for equipment used in explosive gas environments.
- Ex ia (intrinsically safe) certification ensures that the RTDs limit energy within the circuit to prevent ignition in environments containing flammable gases or vapours.
- Ex eb (increased safety) certification validates the design integrity of enclosures and wiring methods to prevent arcs, sparks, and excessive temperatures during normal operation.
This combination allows SDL’s Stator Winding sensors to be safely integrated into Zone 1 and Zone 2 hazardous areas, offering engineers flexibility when designing systems that demand both intrinsic safety barriers and enhanced protection against ignition sources.
Engineered for Mission-Critical Applications
SDL’s Stator Winding RTDs are engineered for precise thermal monitoring in electrical machinery where insulation temperature is directly linked to system longevity and operational integrity. These sensors are now fully qualified for deployment in:
- Electric motors, generators, and alternators operating in explosive gas groups IIA, IIB, and IIC
- Oil & gas, petrochemical, and process industries requiring ATEX and IECEx-compliant components
- Equipment manufacturers seeking verified sensors for OEM integration in hazardous area assemblies
The new certification ensures compliance across diverse equipment categories and simplifies qualification processes for end users, system integrators, and OEMs requiring multi-standard compatibility.
Continuous Innovation in Sensor Engineering
SDL continues to invest in metrology, materials engineering, and safety assurance to support evolving industry standards for temperature measurement in hazardous areas. The addition of dual Ex certification reflects our proactive approach to compliance engineering, ensuring our solutions align with the latest editions of ATEX Directive 2014/34/EU and IECEx operational frameworks.
For engineering teams seeking certified Stator Winding RTDs or tailored sensor assemblies optimised for Ex environments, please contact our technical sales team for application support and custom design consultation.
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