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MEDC HD1 Heat Detector

MEDC HD1 Heat Detector MEDC

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Heat Detector Exd, Exem & Intrinsically Safe (Exia)

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MEDC HD1 Heat Detector Details

The Cooper MEDC heat detector has been designed for use in hazardous environments. These units are suitable for fire alarm and/or suppression systems in offshore and onshore applications including paint spray booths, flammable material stores, turbine rooms, extract ductwork and other hazardous areas throughout the oil & gas, petrochemical and process industries.

Comprising a Fenwal rate-compensated detector with all-stainless steel external construction, mounted to either a type SM87 marine grade alloy enclosure (Exd version) or JB10 corrosion-free GRP enclosure (Exia, Exem/UL versions). The contact in the detector CLOSES at alarm temperature.

To select appropriate temperature setting see specification on reverse.


  • Zone 0, Zone 1 and Zone 2 use.
  • UL listed for USA and Canada
    • Class I, Div 2, Groups A-D.
  • Exia IIC T4/T6, Exd IIB T3/T6 or Exem II T6.
  • ATEX approved:
    • – Ex II 1G (Exia)
    • – Ex II 2G (Exd/Exem).
  • IECEx Certified Ga
  • BASEEFA certified.
  • GOST ‘R’ & ‘K’ certified.
  • SIL 2 certified.
  • Chinese (CQST) certified.
  • Brazilian (Inmetro) certified.
  • IP66 & IP67.
  • Certified temperature:
    • –20°C to +125°C (Exd)*.
    • –20°C to +55°C (Exem/UL).
    • –55°C to +55°C (Exia).
  • Stainless steel probe.
  • Detector temperature settings:
    • 60°C to 385°C
    • 140°F to 725°F
  • Marine grade alloy or GRP enclosure*.
  • Optional guard.

*Model dependent.

CertificationATEX, IECEx, UL, GOST ‘R’ & ‘K’, Russian Fire Approval,CQST, Inmetro, ABS, SIL 2
Explosion Protection


Ex II 2 GD Exd IIC ExtD A21 T85ᵒC

Ex II 2 G EExem II T6 (T4 with diodes/resistors)

Ex II 1 G EExia IIC T6 (T4 with diodes/resistors)

IECEx Ex ia IIC T4/6 Ga.

Area ClassificationZone 0, Zone 1 and Zone 2 use.
Certified Ambient Temperature-20°C to +125°C Exd (T3) ATEX/GOST ‘R’

-20°C to +55°C Exd (T6)/EExem/UL

-55°C to +55°C EExia

Ingress ProtectionIP66 & IP67
MaterialEnclosures: Marine Grade Alloy (Exd)

                     Corrosion-free GRP (EExia/EExem/UL)

Detector: Stainless Steel

Cover Screws: Stainless Steel

Temperature Settings140°F to 725°F (60°C to 385°C)
Entries2 x M20 ISO
Weight1.1-2.0kg (model dependent)
OptionsEnclosures, guard, colour, tag and duty labels,

temperature setting. Series and EOL resistors,

blanking plugs.

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MEDC HD1 Heat Detector