BRITISH (BS EN) STANDARDS FOR FIREHAWK CO ALARMS EXPLAINED
The manufacturing standard for carbon monoxide detectors is divided into two sections. The earlier standard, BS 50291:2001, was replaced in April 2011, leading to its division into two parts: Part One addresses CO detectors for domestic use, while Part Two focuses on detectors designed for recreational vehicles like caravans and boats.
PART 1
HOME USE
BS EN 50291-1:2018
Published: May 2018
Replaced: BS 50291:2010
Look for this if: Purchasing a CO alarm for home use
Part One specifies the test methods and performance requirements for “electrical apparatus for the detection of carbon monoxide in domestic premises,” commonly referred to as carbon monoxide detectors. It covers a broad range of performance and durability criteria, including testing for sensor reaction times, resistance to temperature changes, and minimum alarm volume levels.
This standard is the most widely used for carbon monoxide detectors and establishes a baseline performance level for devices designed for continuous operation in domestic settings.
When purchasing a CO detector for home use, ensure it complies with either Part One or Part Two of BS EN 50291.
PART2
HOME/VEHICLE USE
BS EN 50291-2:2019
Published: September 2019
Replaced: BS EN 50291-2:2010
Look for this if: Purchasing a CO alarm for a vehicle (or home)
Part Two outlines the additional testing and performance requirements for carbon monoxide detectors designed for environments where movement or vibration is expected during their use. Generally, detectors meeting this standard are considered more durable than those certified under Part One alone.
This standard is becoming increasingly common, likely driven by a growing demand for portable CO detectors. Public awareness campaigns have worked to highlight the risks of carbon monoxide exposure during activities like camping or boating.
For holidaymakers or frequent users of boats and caravans, this standard provides a clear way to identify detectors specifically designed to protect them while traveling. Always ensure that CO detectors intended for use outside standard domestic settings comply with Part Two of BS EN 50291.