MEDC HD1BBD190NG

Introduction: The MEDC HD1BBD190NG Hazardous Area Heat Detector is a premium critical-tier industrial fire security monitoring component engineered and manufactured 100% in the United Kingdom (UK) by Cooper MEDC (an Eaton corporation brand). Within complex chemical processing networks, upstream refinery skids, and maritime applications, uncompromised safety diagnostics form the operational cornerstone of factory risk protection. The MEDC HD1 hardware family is specifically optimized to withstand volatile environmental stresses while generating definitive, zero-latency ignition triggers during thermal emergencies.

The mechanical and electronic foundation of the HD1BBD190NG variant leverages cutting-edge safety-instrumented engineering:

• Fenwal Rate-Compensated Technology: The unit comes pre-fitted with a high-accuracy proprietary Fenwal Rate-Compensated Detector Type 27121-20 tracking core. This advanced configuration ensures the system reacts immediately when surrounding air temperatures reach the designated preset threshold, completely independent of how fast or slow the thermal wave expands. This completely eliminates common industrial thermal lag issues while suppressing annoying false alarms.

• LM25 Marine-Grade Housing: The external shell is forged from premium LM25 copper-free marine alloy coated in a rugged industrial Grey epoxy finish. This composition delivers outstanding structural resistance to heavy impacts alongside total barrier protection against harsh salt mist oxidation encountered in open offshore deployments.

• Supreme Redundancy Certifications: Holds a dual certified ATEX/IECEx explosion-proof rating (Ex db sb IIB+H2 T6), making it fully authorized to operate inside volatile environments containing dangerous gases—including Hydrogen gas (H2)—and combustible dust layers. Furthermore, the device is fully audited to SIL 2 Functional Safety metrics, integrating cleanly into high-tier emergency shutdown (ESD) loops.

⚙️ TECHNICAL HARDWARE CONFIGURATION MATRIX:

• Integrated Sensor Core: Fenwal Rate-Compensated Element Type 27121-20.

• Factory Set Temperature Limit: Configured fixed at 190°F (approximately 88°C).

• Conduit Entry Interfaces: Engineered with 2 x M20 threaded entries as a standard layout for dual-line loop topology.

• Sub-Configuration Options: None (Standard factory architecture).

• Outer Casing Coating (Finish): Finished in industrial Grey.

Key Features & Technical Specifications:

• Manufacturer: MEDC (Eaton / United Kingdom)

• Product Series: HD1 Explosion-Proof Thermal Sensing Portfolio

• Model Designation Code: HD1BBD190NG

• Device Type: Rate-Compensated Fixed Temperature Hazardous Area Heat Detector

• Explosion Protection Ratings: Dual ATEX/IECEx approved Ex II 2 GD, Ex db sb IIB+H2 T6 (T3 @ +125°C environmental limits).

• Functional Safety Integrity: Audited and certified to SIL 2 safety thresholds.

• Structural Metallurgy: Heavy-walled LM25 marine-grade cast alloy housing ensuring optimal long-term rust protection.

• Cable Landing Mechanics: Standard dual M20 entries accommodating heavy industrial armored cable glands.

• Country of Origin: 100% Made in the United Kingdom.