{"product_id":"apollo-55000-440apo-xp95-i-s-intrinsically-safe-heat-detector-a2s","title":"Apollo 55000-440APO XP95 I.S. Intrinsically Safe Heat Detector (A2S)","description":"\u003cp\u003e\u003cstrong\u003e55000-440APO\u003c\/strong\u003e is the Apollo XP95 I.S. (intrinsically safe) heat detector, classified A2S. It is an analog addressable detector from the XP95 range built for hazardous areas, where it is connected to the loop through a mandatory safety barrier. A single thermistor reports a count proportional to the surrounding air temperature, which suits areas that are normally dirty or smoky.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e55000-440APO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRange\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eXP95 I.S., native XP95 protocol, compatible with Discovery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClassification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eA2S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSensor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSingle NTC thermistor, continuous sampling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDetection principle\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLinear approximation from 25 °C to 90 °C, 1 °C per count\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSupply voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e14 to 22 VDC, two-wire, polarity sensitive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eQuiescent current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e150 µA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower-up surge\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 mA for 0.3 s; maximum power-up time 4 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAlarm indicator\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRed LED, 700 µA; remote LED current 500 µA (internally limited)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTerminals\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eL1 positive supply; L2 negative supply and remote LED negative; +R remote LED positive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHazardous area classification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEx ia IIC T4 Ga and Ex ia IIC T5 Ga (ambient up to +60 °C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCertificates\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBASEEFA BAS02ATEX1289X; IECEx BAS12.0091X\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-20 °C to +45 °C (T5); -20 °C to +60 °C (T4)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStorage temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-30 °C to +80 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHumidity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0 to 95% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIP rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIP44\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100 mm diameter x 42 mm height\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e105 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWhite flame-retardant polycarbonate housing; nickel-plated stainless steel terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eCompatibility and installation notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eA safety barrier is a mandatory part of an I.S. system. Apollo states a typical I.S. circuit carries up to 20 detectors (12 optical detectors in an IIC environment), depending on barrier type, devices fitted and how many detector LEDs the control panel lets illuminate at once.\u003c\/li\u003e\n\u003cli\u003eThe remote LED is wired in series with the integral LED and cannot be controlled separately from it, as it can on standard XP95 detectors.\u003c\/li\u003e\n\u003cli\u003eA remote LED indicator and its terminations need at least IP20 protection and segregation from other circuits per BS EN 60079-14.\u003c\/li\u003e\n\u003cli\u003eIntended for hazardous areas, dusty environments, refineries and offshore platforms.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eRelated models\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/apollo-53832-070apo\"\u003eApollo 53832-070APO MiniDisc Remote Indicator\u003c\/a\u003e, named by Apollo as a suitable remote indicator for this detector\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDocuments\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apollo-fire.co.uk\/wp-content\/uploads\/2025\/10\/PP5029_XP95-IS-Heat-Detector_Issue-4.pdf\"\u003eApollo PP5029 XP95 I.S. Heat Detector datasheet, Issue 4 (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apollo-fire.co.uk\/wp-content\/uploads\/2025\/10\/F0000224_0001.pdf\"\u003eApollo PP1095 Introduction to Intrinsic Safety (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/apollo-fire.co.uk\/products\/xp95\/detector\/55000-440apo-xp95-i-s-heat-detector-a2s\/\"\u003eApollo product page, 55000-440APO\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eSpecifications from Apollo datasheet PP5029\/2026 Issue 4. Manufacturer specifications are subject to change.\u003c\/em\u003e\u003c\/p\u003e","brand":"Apollo","offers":[{"title":"Default Title","offer_id":67753670279392,"sku":"55000-440APO","price":194.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/files\/E0002063_00011.webp?v=1791291903","url":"https:\/\/thefirealarmsupplier.com\/products\/apollo-55000-440apo-xp95-i-s-intrinsically-safe-heat-detector-a2s","provider":"The Fire Alarm Supplier","version":"1.0","type":"link"}