Ionisation Smoke Detector
Air in the dual sensing chambers is irradiated to produce ions that travel to the positive and negative electrodes, creating a current flow. As smoke enters the outer chamber, the flow drops and voltage increases. The voltage is measured and an analogue signal is converted to digital for transmission to the control equipment.

For important technical information regarding sensitivity to air movement, please click here.

Optical Smoke Detector
The XP95 optical detector uses an internal pulsing LED and a photo-diode at an obtuse angle. In the event of smoke entering the chamber, the light pulse from the LED will be scattered and registered by the photo-diode. A signal is generated and transmitted digitally to the control equipment.

Heat Detector
The XP95 heat detector has a low air-flow resistant case for good contact between the sensing thermistor and the surrounding air. Temperature is measured by a single thermistor network which gives a voltage output proportional to the external air temperature. The signal is processed and transmitted to the control equipment.

Multisensor Detector
The XP95 multisensor detector contains an optical smoke sensor and a thermistor temperature sensor whose outputs are combined to give the final analogue value.

Beam Detector
The XP95 beam detector comprises three parts: a transmitter, a receiver and an interface. The detector has been designed to protect large, open spaces.

To find out more, visit the Beam Detector page.

Flame Detector
The XP95 flame detector is sensitive to low-frequency, flickering infra-red radiation emitted by flames during combustion. It is designed for use in large areas that require a detector to give a fast response in potentially dusty or highly flammable environments.

To find out more, visit the XP95 Flame Detector page.

Manual Call Point
When operated, the manual call point interrupts the polling cycle and can report its address in under 0.2 seconds.

Sounders
There are two types of loop-powered sounder available, one ceiling mounted (85dB) and one stand-alone (100dB).

To find out more, visit the Sounders page.