Apollo XP95 & Discovery Detectors
Apollo XP95 and Discovery are addressable detector families used on a large number of fire alarm loops in UK commercial and industrial buildings. This page lists the detector heads in both ranges: optical smoke, heat, multi-sensor and carbon monoxide detectors, including marine-approved,...
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![Apollo 58000-700MAR Discovery Marine Multi-Sensor Detector (Optical/Heat) [SIL2] - JEM Systems UK](http://jemsystems.co.uk/cdn/shop/files/apollo-default-title-apollo-58000-700mar-discovery-marine-multi-sensor-detector-optical-heat-sil2-58000-700mar-63957941322101.jpg?v=1766067779&width=1920)


![Apollo 55000-440SIL XP95 I.S. Heat Detector (A2S) [SIL2] - JEM Systems UK](http://jemsystems.co.uk/cdn/shop/files/apollo-default-title-apollo-55000-440sil-xp95-i-s-heat-detector-a2s-sil2-55000-440sil-63957709783413.jpg?v=1766067705&width=620)
![Apollo 58000-700SIL Discovery Multi-Sensor Detector (Optical/Heat) [SIL2] - JEM Systems UK](http://jemsystems.co.uk/cdn/shop/files/apollo-default-title-apollo-58000-700sil-discovery-multi-sensor-detector-optical-heat-sil2-58000-700sil-63957902819701.jpg?v=1766067770&width=620)
![Apollo 58000-400SIL Discovery Heat Detector [SIL2] - JEM Systems UK](http://jemsystems.co.uk/cdn/shop/files/apollo-default-title-apollo-58000-400sil-discovery-heat-detector-sil2-58000-400sil-63957944762741.jpg?v=1766067780&width=1920)
![Apollo 58000-600SIL Discovery Optical Smoke Detector [SIL2] - JEM Systems UK](http://jemsystems.co.uk/cdn/shop/files/apollo-default-title-apollo-58000-600sil-discovery-optical-smoke-detector-sil2-58000-600sil-63957959442805.jpg?v=1766067778&width=1920)
![Apollo 58000-600MAR Discovery Marine Optical Smoke Detector [SIL2]b - JEM Systems UK](http://jemsystems.co.uk/cdn/shop/files/apollo-default-title-apollo-58000-600mar-discovery-marine-optical-smoke-detector-sil2-b-58000-600mar-63957961572725.jpg?v=1766067772&width=620)

About Apollo XP95 & Discovery Detectors
Apollo XP95 and Discovery are addressable detector families used on a large number of fire alarm loops in UK commercial and industrial buildings. This page lists the detector heads in both ranges: optical smoke, heat, multi-sensor and carbon monoxide detectors, including marine-approved, SIL2 and intrinsically safe versions.
XP95 or Discovery?
- XP95 is the older of the two protocols. XP95 heads include optical smoke detectors, A2S and CS heat detectors and a multi-sensor detector.
- Discovery is the later protocol, with optical smoke, heat, multi-sensor and CO detectors. Discovery devices can work with XP95 devices on a suitable Apollo loop, but the panel must support the protocols in use. Check the panel manufacturer's information.
- Do not mix protocols from other manufacturers, such as Hochiki ESP, on the same loop.
Standards and bases
Smoke detectors are tested to EN 54-7 and heat detectors to EN 54-5. Heads are usually sold separately from the base: XP95 and Discovery detectors fit the Apollo XPERT 7 base in standard, deep and isolating versions. Browse our detector bases to choose one.
More Apollo detection
See all smoke detectors, heat detectors, multi-sensor detectors, or the full Apollo range.
















![Apollo 58000-400MAR Discovery Marine Heat Detector [SIL2] - JEM Systems UK](http://jemsystems.co.uk/cdn/shop/files/apollo-default-title-apollo-58000-400mar-discovery-marine-heat-detector-sil2-58000-400mar-63957946532213.jpg?v=1766067781&width=1920)
