Professional Home Safety from Honeywell

Honeywell Home Safety

HF500 Mains Powered Flammable Gas Alarms 

The HF500 flammable gas alarms from Honeywell have been specifically designed to meet the needs of a wide variety of users; from home owners to social housing landlords and owners of static holiday homes. With a combination of performance, affordability and ease of installation, the HF500 is able to provide up to five years of flammable gas monitoring.





  • Hard-wired for peace of mind

Easy to operate

  • Clearly visible status indication LEDs; power, alarm, fault
  • Loud 85dB alarm and button for test and alarm mute

High reliability

  • Approved to EN50194-1:2009 by BSI (Kitemarked KM 590203)
  • State-of-the-art catalytic sensor technology
  • Professional design

Low total cost of ownership

  • Optimised for easy wiring and installation
  • Direct connection to a solenoid valve
  • 5 year product life with 2 year guarantee

Designed for residential environments

  • Small, compact design optimised for residential settings

Easy to install

  • Easy to access wiring terminal
  • Cable entry from the back or via mini trunking from the sides or bottom of the device
  • Fits to standard electrical installation boxes
  • Design allows alarm to be replaced without rewiring
  • Installer mode to test the functionality of the relays

A complete solution

  • Integrated alarm relay can operate normally open and normally closed solenoid valves for automatic gas shut off
  • Alarm and fault relays can also be used to connect to a control panel/alarm system
  • Honeywell also offers a wide range of suitable solenoid valves

The HF500 alarms can be ideally complemented with Honeywell's solenoid valves to provide an automatic gas shut-off system. The HF500 can be used with either normally open or normally closed solenoid valves. The valves are constructed in such a way that manual intervention is required to reopen the valve after the alarm threshold has been exceeded.


This mains powered Flammable Gas Alarm must be installed by a competent person qualified to carry out electrical work according to current national wiring regulations. Please download the manual above for further information.

Technical Specifications

Detection PrincipleCatalytic flammable gas sensor
Third Party ApprovalsEN50194-1:2009 Kitemarked (KM 590203)
Other CompliancesRoHS
Self TestYes
Lifetime And Warranty5y / 2y
Operating Environment 
Operating Temperature Range-10ºC to +55ºC
Humidity0-95% RH (non-condensing)
Ip RatingIPX2D
Electrical and Interconnection 
Operating Voltage110-230VAC 50/60Hz
Power Consumption<6.5W
Relay Output FittedAlarm relay: 5A 250VAC SPDT (single pole changeover), Faukt relay: 0.25A 250VAC SPST NO (single pole)
User Interface 
Visual IndicatorPower: Green LED, Alarm: Red LED, Fault: Yellow LED
Audible>85dB @ 1 m
ButtonFor test and alarm mute, Installer test mode for relays
Test FacilityCalibration level: 10% LEL, Accuracy tolerance: +/- 2.5% LEL
Models AvailableMethane for HF500NG, Butane for HF500LPG
Weight<400 g
Dimensions150 x 104 x 37 mm
Packaging TypeCarton box
Scope Of SupplyHF500 alarm Mounting kit: Scews and plugs, User and installer manual