HAVANT firm Apollo Fire Detectors has expanded its range of wireless alarms which are used in historic or ornate buildings.
No drilling is required for the XPander devices, which means that the buildings can be protected without damaging the decor in such important places.
They are also used in listed buildings, which are subject to strict rules preventing the original fabric of the structure from being altered.
The devices work wirelessely via radio signal.
The range now includes an optical smoke detector, a multi-sensor smoke detector, and two types of heat detector.
Apollo has recently supplied its products for a museum in Bristol and two Australian prisons.