FHF Ex-proof Signalling Hooter mHG 11

The FHF mHG 11 Ex delivers a powerful audible warning signal in hazardous areas where explosive gases or dust may be present. Designed for use in Zones 1, 2, 21, and 22, it provides reliable alarm and warning signalling for industrial, offshore, petrochemical, and processing applications.

Furthermore, the mHG 11 Ex generates a sound output of approximately 108 dB(A), ensuring that alarm signals remain clearly audible in demanding and noisy environments. The unit uses a powerful non-polarised electromagnetic drive with an adjustable striker that impacts the diaphragm 100 to 120 times per second, creating a distinctive warning tone that quickly captures attention.

In addition, the hooter is available with common industrial supply voltages, allowing easy integration into existing alarm systems. The DC version includes an electronic circuit breaker, providing additional protection and enhancing operational reliability.

Built for harsh environments, the mHG 11 Ex features an IP66-rated enclosure, offering excellent protection against dust and water ingress. As a result, it performs reliably in both indoor and outdoor installations where dependable audible warning is critical.

Key Features

• Explosion-protected signalling hooter
• Suitable for Zone 1, Zone 2, Zone 21, and Zone 22 hazardous areas
• Sound output of approximately 108 dB(A)
• Powerful non-polarised electromagnetic drive
• Adjustable striker mechanism
• Distinctive and highly audible warning signal
• Available with common industrial supply voltages
• DC version includes an electronic circuit breaker
• Suitable for indoor and outdoor applications
• Robust and reliable construction
• IP66-rated environmental protection

Certifications & Protection

• Ingress Protection: IP66
• Protection Class: I
• Protection Type:
  • II 2 G Ex e mb IIC T5 Gb
  • II 2 G Ex e mb IIC T4 Gb
  • II 2 D Ex tb IIIC T90°C Db