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ALSTOM EPSD-0603 DFI-150-0003
ALSTOM EPSD-0603 DFI-150-0003
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Woodward ESDR4
Woodward ESDR4

Det-Tronics EQ21OOCG

Product Brief:​ An addressable, microprocessor-based infrared point gas detector from the Eagle Quantum Premier® (EQP) family by Detector Electronics (Det-Tronics, Carrier). Detects combustible hydrocarbon gases (methane, propane, hexane, etc.) using dual-wavelength IR absorption to eliminate false alarms from humidity, temperature, or inert gas displacement. Certified SIL 2 capable.

Category:
Description
Technical Data:
  • Detection Principle:​ Infrared (IR) absorption — dual wavelength (measuring + reference)
  • Target Gases:​ Hydrocarbon LEL (Lower Explosive Limit) — Methane (CH₄), Propane (C₃H₈), Butane, Hexane etc.; LEL range 0–100 % LEL
  • Communication:​ Addressable on Det-Tronics EQP LON/SLC (Local Operating Network / Signaling Line Circuit)
  • Alarm Setpoints:​ Two programmable alarm levels (typically 20 % LEL & 50 % LEL)
  • Response Time (T₉₀):​ Typically ≤ 15 seconds depending on gas and diffusion path
  • Supply:​ Powered from EQP system loop (nominal 24 VDC)
  • Enclosure:​ Explosion-proof, NEMA 4X / IP66, typically 316 SS or copper-free aluminum
  • Ambient Temp:​ –40 to +75 °C (–40 to +167 °F)
  • Humidity:​ 0–99 % RH non-condensing
  • Certifications:​ FM, CSA, ATEX, IECEx, SIL 2 capable, meets NFPA 72
Features:
  • Self-diagnostic checks (optics dirty, lamp fail, electronics fault)
  • Non-intrusive calibration via magnetic tool or EQP programmer
  • Immune to catalytic bead poisoning; suitable for oxygen-deficient atmospheres
Application:​ Offshore platforms, refinery process units, LNG terminals, chemical plants — anywhere flammable gas accumulation must be detected with high reliability.
Installation Notes:
  • Mount in areas of potential gas accumulation (low points for heavier-than-air gases, high points for lighter). Minimum 30 cm clearance from walls/obstructions for proper diffusion.
  • Orientation — sensor inlet downward; avoid direct sunlight on optics.
  • Perform bump test after installation; schedule periodic calibration per site policy.
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