Manufactures fire alarm sounders, bells, beacons and combined sounder/beacons, including the Sonos and Nexus ranges, from Haslingden. Fire signalling products are certified to BS EN 54-3 for sounders and BS EN 54-23 for visual alarm devices, with published ISO 9001:2015 and ISO 45001:2018 certificates. Part of the Halma plc group.