Cooper-Wheelock MEDC Explosion Proof Bell Alarm 24V (Grey) dGW21 FHF 910 242 70 | FHF 910 242 70

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MODEL: FHF 910 242 70

Regular Price: $2,983.55

Special Price: $1,730.46

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Product Features

  • Precision glass reinforced polyester housing includes the junction box with ½”NPT conduit entries, resistant to acids, sea water, alkali and moisture.

  • Weatherproof Type 4X / IP66 environmental ratings. 

  • Bell Volume - Approx. 105 dB (A). 

  • Ringing emphasis at 1000Hz stands out clearly against low frequency ambient and machinery noises.

  • Fully sealed electronics provide unparalleled resistance to chemicals and moisture in harsh environments.

  • 316 stainless steel mounting bracket.

  • Captive terminal box screws prevents their loss.

  • Version available with an integrated telephone call relay.

  • DC versions are equipped with an electronic contact breaker, increasing the service life when compared with other products.

  • Blocking diode allows installation on fire alarm notification appliance circuits

Cooper-Wheelock MEDC Explosion Proof Bell Alarm 24V (Grey) dGW21 FHF 910 242 70

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  • Cooper-Wheelock MEDC Explosion Proof Bell Alarm 24V (Grey) dGW21 FHF 910 242 70


The Cooper-Wheelock MEDC Explosion Proof Bell Alarm 24V (Grey) dGW21 FHF 910 242 70 has been designed to be used in hazardous areas found in the process industries, for onshore chemical and petrochemical plants, food processing, off-shore platforms and pharmaceutical plants.

This alarm bell has been developed to withstand the temperature differences found outdoors, high humidity, exposure to sea water and dust, as well as heavy mechanical wear and tear. With a blocking diode included, this bell can be installed on fire alarm notification appliance circuits, making it perfect for explosion proof fire alarm systems.


  • Housing Material: GRP (Glass reinforced polyester)
  • Housing Colour: Black
  • Bell Dome Material:  Epoxy Coated Steel
  • Bell Dome Colours: Grey
  • Dimensions:  200 x 210mm (200 x 270mm including bracket)
  • Weight: 5.5kg
  • Conduit Connection: Side entry, ½” NPT, Integral junction box
  • Mounting: Bell dome to the front, tappet downwards
  • Alarm Signal Volume: Approx. 105 dB (A) at 1 m distance
  • Operating Voltage: 24 VDC 
  • Operation Mode: Continuous
  • Oper. Volt. Range: +10/ -15%
  • Current Cons: 0,317 A 


Type        Description                                Rated Voltage      Oper. Volt. Range          Current Cons. 

dGW21    Alarm Bell Grey Bell Dome        24 VDC                 +10/ -15%                     0,317 A 

dGW21    Alarm Bell Red Bell Dome         24 VDC                 +10/ -15%                     0,317 A 

dGW21    Alarm Bell Grey Bell Dome       120 VAC 60Hz       +10/ -15%                     0,17 A 

dGW21    Alarm Bell Red Bell Dome         120 VAC 60Hz      +10/ -15%                     0,17 A

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At Telcom & Data we strive for long term customer relationships, that’s why we offer a 60 day 100% money back guarantee on ALL of our products. (Except Special Made-to-Order Products, including Wheelock MEDC and Explosion Proof Products) If you are not happy with a product for any reason simply call us at 800-335-0229 and request a Return Authorization number for a full 100% credit. All returns require prior authorization, please. Returned items must be repacked in ORIGINAL packaging NO EXCEPTIONS. Telcom & Data wants to be your one stop telecommunications company. Let us know how were doing by calling 800-335-0229 and ask for extension 832.