Detectors
Replacing NSC detectors (Hochiki and Apollo): types, successors and bases
Which NSC, Hochiki and Apollo detectors manufactured from 2000 onwards must be replaced, what is still available, which detector replaces older types and when a new base is needed – with the manufacturers’ order numbers.
Detector age
How old is the detector – how long has it been in operation?
- Hochiki / Apollo (NSC, Labor Strauss, MEP, Hertek): The detector label shows a date code or the serial number, from which the year of manufacture can be derived. The commissioning date can be found in the system’s logbook and records.
- Logbook and reports (decisive): The operating time counts from the commissioning of the detector. The date is recorded in the logbook, in the commissioning or acceptance report or in the last replacement report. This gives the years and months in operation.
- Type plate on the detector: The label (usually on the underside or side of the detector, visible after twisting it out of the base) shows the type, serial number and date of manufacture or a date code (e.g. year/calendar week). If no commissioning date is documented, we take the cautious approach of calculating from the date of manufacture.
- Reading out via the panel: With many addressable loop detectors, detector data such as serial number, date of manufacture, degree of contamination and – depending on the system and software version – operating hours can be retrieved via the panel’s operating unit or programming software. We do this during the survey using your programming file.
This determines the replacement interval under DIN 14675: as a rule 5 years, or 8 years for detectors with contamination compensation and testing in accordance with the manufacturer’s specifications – details under Deadlines & standards. Send us a photo of the type plate and we will determine the age for you.
NSC Sicherheitstechnik
Which NSC detector do you have installed?
The fire alarm control panels Solution F1/F2 from NSC Sicherheitstechnik work with detectors from Hochiki or Apollo – depending on the system. Which family is installed is shown on the detector: ALN-, ACC-, ACD-, ATJ-…-EN = Hochiki ESP (addressable loop), SOC-, DCD-, DFJ-…E3 = Hochiki CDX (conventional); XP95, Discovery, Soteria = Apollo addressable loop, Orbis and Series 65 = Apollo conventional. NSC lists the detectors under its own item numbers (Bxxxxx-xx); for Apollo we also give the manufacturer’s code. Apollo detectors and bases are not only found in NSC systems: for Germany, Austria and Switzerland, Apollo also lists Labor Strauss (Labor Strauss Sicherungsanlagenbau, Labor Strauss Sicherheitssysteme and Labor Strauss Sicherheitssysteme Nord), MEP-Gefahrenmeldetechnik (Labor Strauss Group) and Hertek as system partners. The information on Apollo detectors and bases applies equally to these systems; the Apollo manufacturer’s code is decisive.
Images: NSC Sicherheitstechnik / Hochiki / Apollo. Examples shown; housing colour and labelling may vary by type.
No longer available
NSC with Hochiki detectors: replace older types, base remains
Older Hochiki detectors of the ESP loop series and the CDX conventional series are being replaced by the current generation. The successors fit the existing bases YBN-R/3 (ESP) and YBN-R/6 (CDX) respectively – the base remains.
Hochiki ESP (addressable loop) and CDX (conventional)
| Image | Old detector | Old type | Available? | Alternative detector (NSC item no.) | New base? |
|---|---|---|---|---|---|
| Optical addressable loop detector ESP | ALG-EN | no – discontinued | ALN-EN (NSC B02002-00) | no – YBN-R/3 remains |
| Optical addressable loop detector ESP, older version | ALG-E | no – discontinued | ALN-EN (NSC B02002-00)² | no – YBN-R/3 remains |
| Multi-sensor addressable loop detector ESP | ACA-E | no – discontinued | ACC-EN (NSC B02011-00)² | no – YBN-R/3 remains |
 | Addressable loop heat detector ESP | ATG-EA | no – discontinued | ATJ-EN (NSC B02021-00)² | no – YBN-R/3 remains |
| Ionisation smoke detector ESP | AIE-E | no – discontinued | ACC-EN (NSC B02011-00) or ACD-EN (NSC B02015-00)¹ | no – YBN-R/3 remains |
| Optical smoke detector CDX (conventional) | SLR-E3N | no – discontinued | SOC-E3N (NSC B03003-00)² | no – YBN-R/6 remains |
¹ Ionisation detectors are no longer manufactured. Which detector replaces them depends on the fire detection and alarm concept – we agree this with you. ² Functionally equivalent successor; we check using your detector list and programming file whether the type runs on your control panel without reprogramming.
Current series
Hochiki ESP and CDX: same detector, same base
NSC currently stocks these Hochiki detectors. When replaced on schedule, the detector is exchanged for the same type and the existing base remains. Detectors with SCI have integrated isolators and belong to the ESP Top Loop technology.
| Image | Detectors | Item no. (NSC) | Available? | Replace with | New base? |
|---|---|---|---|---|---|
| Optical addressable loop detector ALN-EN | NSC B02002-00 | yes | same type | no – YBN-R/3 remains |
| Optical addressable loop detector ALN-EN SCI (with isolators) | NSC B02003-00 | yes | same type | no |
| Multi-sensor addressable loop detector ACC-EN | NSC B02011-00 | yes | same type | no |
| Multi-sensor addressable loop detector ACC-EN SCI (with isolators) | NSC B02012-00 | yes | same type | no |
 | Multi-criteria addressable loop detector ACD-EN (O/T/CO) | NSC B02015-00 | yes | same type | no |
| Multi-heat addressable loop detector ATJ-EN | NSC B02021-00 | yes | same type | no |
| Multi-heat addressable loop detector ATJ-EN SCI (with isolators) | NSC B02023-00 | yes | same type | no |
| Multi-heat addressable loop detector ACB-EW, IP67 | NSC B02022-00 | yes | same type | no |
| Optical smoke detector SOC-E3N (conventional) | NSC B03003-00 | yes | same type | no – YBN-R/6 remains |
 | Fixed-temperature heat detector 60 °C DFJ-AE3 (conventional) | NSC B03015-00 | yes | same type | no |
| Fixed-temperature heat detector 90 °C DFJ-CE3 (conventional) | NSC B03020-00 | yes | same type | no |
| Multi-heat detector 60 °C DCD-AE3 (conventional) | NSC B03025-00 | yes | same type | no |
| Multi-heat detector 90 °C DCD-CE3 (conventional) | NSC B03030-00 | yes | same type | no |
| Fixed-temperature heat detector 60 °C DFG-60BLKJ, IP67 (conventional) | NSC B03050-00 | yes | same type | no |
Variants in black (BLK) and with SIL or marine approval are also available – please specify when making your enquiry.
Bases
Hochiki bases at NSC: when a new base is needed
The standard base remains when the detector is replaced. A new base is only needed if you switch to detectors using a different technology – for example from conventional (CDX) to addressable loop (ESP).
| Image | Bases | Item no. (NSC) | Suitable for | Note |
|---|---|---|---|---|
| Standard mounting base YBN-R/3, white | NSC B02200-00 | ESP addressable loop detectors | remains during replacement |
| Mounting base YBN-R/3 SCI with dual isolator | NSC B02220-00 | ESP addressable loop detectors | remains during replacement |
| Mounting base YBV-R/4 (ESP Top Loop) | NSC B02222-00 | ESP Top Loop detectors | remains during replacement |
 | Standard mounting base YBN-R/6 | NSC B03100-00 | CDX conventional detectors | remains during replacement |
| Relay base YBO-R/6RN, non-latching | NSC B03107-00 | CDX conventional detectors | remains during replacement |
| Relay base YBO-R/6R, latching | NSC B03109-00 | CDX conventional detectors | remains during replacement |
No longer available
Apollo detectors (NSC, Labor Strauss, MEP, Hertek): replacing older types
Ionisation detectors of the Apollo series XP95 and Discovery have been discontinued. This affects systems from NSC as well as from Labor Strauss, MEP-Gefahrenmeldetechnik and Hertek. According to NSC, the successor Soteria is backward compatible with XP95 and Discovery (protocol and base) – the existing base 45681-210 remains. Conventional detectors of the older Series 60 can be replaced by Series 65 or, using the adapter B04500-00, by Orbis detectors on the existing base.
Apollo XP95, Discovery and Series 60
| Image | Old detector | Old manufacturer’s code | Available? | Alternative detector (NSC item no. / manufacturer’s code) | New base? |
|---|---|---|---|---|---|
 | Ionisation smoke detector XP95 | 55000-500 | no – discontinued | Soteria Multisensor (NSC B02904-00 / SA5100-700)¹ | no – 45681-210 remains |
| Ionisation smoke detector Discovery | 58000-500 | no – discontinued | Soteria Multisensor (NSC B02904-00 / SA5100-700)¹ | no – 45681-210 remains |
 | Optical smoke detector Series 60 (conventional) | see rating plate | no – discontinued | S65 optical smoke detector (NSC B03570-00 / 55000-317) or Orbis with adapter³ | no – base remains; for Orbis, adapter B04500-00 |
| Heat detector Series 60 (conventional) | see rating plate | no – discontinued | S65 heat detector of the appropriate class, e.g. A1R (NSC B03576-00 / 55000-122)³ | no – base remains |
¹ Ionisation detectors are no longer manufactured. Which detector replaces them depends on the fire detection and alarm concept – we agree this with you. Soteria requires your control panel to support the detector; we check this in advance. ³ According to NSC, the adapter B04500-00 (ORB-BA-10008) allows Orbis detectors to be used on S60/S65 bases. The heat class depends on the place of installation.
Current series
Apollo Soteria, Discovery, XP95, Orbis and Series 65: same detector, same base
These Apollo detectors are currently available – equally for NSC, Labor Strauss, MEP and Hertek systems; the item number refers to NSC, while the manufacturer’s code applies across all suppliers. When replaced on schedule, the detector is exchanged for the same type and the existing base remains. For XP95 and Discovery systems, Soteria is the recommended successor.
| Image | Detectors | Item no. (NSC / manufacturer’s code) | Available? | Replace with | New base? |
|---|---|---|---|---|---|
| Optical addressable loop detector Soteria | NSC B02900-00 / SA5100-600 | yes | same type | no – 45681-210 remains |
 | Multi-sensor addressable loop detector Soteria (O/T) | NSC B02904-00 / SA5100-700 | yes | same type | no |
| Multi-sensor addressable loop detector Soteria Dual Optical | NSC B02908-00 / SA5100-710 | yes | same type | no |
| Tri-sensor detector Soteria Dual Optical + CO | NSC B02910-00 / SA5100-810 | yes | same type | no |
 | Multi-heat addressable loop detector Soteria | NSC B02906-00 / SA5100-400 | yes | same type | no |
| Optical addressable loop detector Discovery | NSC B02700-00 / 58000-600 | yes | same type or Soteria (B02900-00) | no – 45681-210 remains |
| Multi-sensor addressable loop detector Discovery (O/T) | NSC B02704-00 / 58000-700 | yes | same type or Soteria (B02904-00) | no |
| Addressable loop heat detector Discovery | NSC B02706-00 / 58000-400 | yes | same type or Soteria (B02906-00) | no |
| CO addressable loop detector Discovery | NSC B02708-00 / 58000-300 | yes | same type | no |
| Multi-sensor addressable loop detector Discovery (CO/T) | NSC B02710-00 / 58000-305 | yes | same type | no |
| Optical addressable loop detector XP95 | NSC B02600-00 / 55000-620 | yes | same type or Soteria (B02900-00) | no – 45681-210 remains |
| Addressable loop heat detector XP95 A2S (55 °C) | NSC B02606-00 / 55000-420 | yes | same type or Soteria (B02906-00) | no |
| Addressable loop heat detector XP95 A2S (55 °C), variant | NSC B02607-00 / 55000-400 | yes | same type | no |
| Addressable loop heat detector XP95 CS (90 °C) | NSC B02608-00 / 55000-401 | yes | same type | no |
| Optical smoke detector Orbis (conventional) | NSC B03540-00 / ORB-OP-12001 | yes | same type | no – Orbis base remains |
| Multi-sensor Orbis O/T (conventional) | NSC B03542-00 / ORB-OH-13001 | yes | same type | no |
| Heat detector Orbis A1R (57 °C) | NSC B03544-00 / ORB-HT-11001 | yes | same type | no |
| Fixed-temperature heat detector Orbis A1S (57 °C) | NSC B03546-00 / ORB-HT-11166 | yes | same type | no |
| Fixed-temperature heat detector Orbis A2S (61 °C) | NSC B03548-00 / ORB-HT-11002 | yes | same type | no |
| Heat detector Orbis BR (73 °C) | NSC B03550-00 / ORB-HT-11003 | yes | same type | no |
| Fixed-temperature heat detector Orbis BS (73 °C) | NSC B03552-00 / ORB-HT-11004 | yes | same type | no |
| Heat detector Orbis CR (90 °C) | NSC B03554-00 / ORB-HT-11005 | yes | same type | no |
| Fixed-temperature heat detector Orbis CS (90 °C) | NSC B03556-00 / ORB-HT-11006 | yes | same type | no |
| Optical smoke detector Series 65 (conventional) | NSC B03570-00 / 55000-317 | yes | same type | no – S65 base remains |
| Heat detector Series 65 A1R | NSC B03576-00 / 55000-122 | yes | same type | no |
| Heat detector Series 65 BR | NSC B03578-00 / 55000-127 | yes | same type | no |
| Heat detector Series 65 CR | NSC B03580-00 / 55000-132 | yes | same type | no |
| Fixed-temperature heat detector Series 65 CS | NSC B03582-00 / 55000-137 | yes | same type | no |
Variants with flashing LED, in black or with SIL2 approval are also available – please specify when making your enquiry.
Bases
Apollo bases (NSC, Labor Strauss, MEP, Hertek): when a new base is needed
Apollo bases are used equally by NSC, Labor Strauss, MEP-Gefahrenmeldetechnik and Hertek. XP95, Discovery and Soteria detectors fit the same loop base; Orbis and Series 65 have their own conventional bases. A new base is only needed when changing technology (conventional ↔ addressable loop).
| Image | Bases | Item no. (NSC / manufacturer’s code) | Suitable for | Note |
|---|---|---|---|---|
| Loop detector base XP95/Discovery (with XPERT7 card) | NSC B02750-00 / 45681-210 | XP95, Discovery, Soteria | remains during replacement |
| Detector base with isolator XP95/Discovery | NSC B02752-00 / 45681-284 | XP95, Discovery | remains during replacement |
 | Soteria XPERT8 standard base | NSC B02950-00 / SA5000-200 | Soteria, XP95, Discovery | for new installations; existing 45681-210 bases remain |
 | Orbis TimeSaver base | NSC B03558-00 / ORB-MB-00001 | Orbis | remains during replacement |
| Orbis relay base | NSC B03560-00 / ORB-RB-10004 | Orbis | remains during replacement |
 | Standard base Series 65 | NSC B03584-00 / 45681-200 | Series 60/65 | remains during replacement |
| Relay base Series 65 | NSC B03586-00 / 45681-245 | Series 65 | remains during replacement |
| Adapter Orbis to S65 base | NSC B04500-00 / ORB-BA-10008 | Orbis detectors on S60/S65 bases | instead of base replacement |
Special detectors
NSC (Hochiki / Apollo): wireless, Ex, duct and linear detectors
For special applications, NSC distributes wireless detectors from Apollo, aspirating smoke detectors from Stratos and linear beam smoke detectors. We coordinate Ex, duct and linear detectors from Hochiki or Apollo individually with NSC, as the dealer price list is not public.
| Image | Detectors | Item no. | Available? | Replace with | Note |
|---|---|---|---|---|---|
| – | Apollo XPander wireless optical smoke detector incl. base (wireless extension for XP95/Discovery loop, EN 54-25) | XPA-CB-12034-APO | yes | same type; batteries according to manufacturer’s specifications | via XPander Loop Interface |
| – | Aspirating smoke detector Stratos HSSD 2, Micra, ModuLaser (EN 54-20) | see Stratos page | yes | Detector chamber as specified by the manufacturer | Connection via APIC card Hochiki/Apollo |
| – | Linear beam smoke detectors (e.g. Fireray, FIREBEAM) and Ex detectors for Hochiki/Apollo loops | on request | yes | same type | via input/output module or Ex barrier |
We will give you the NSC order numbers with the quote.
Important
Before ordering
- Check the panel: Whether Hochiki or Apollo detectors can be operated on your fire alarm control panel (NSC Solution F1/F2, Labor Strauss, MEP or Hertek) depends on the panel, protocol and programming. We check this using your detector list and programming file.
- Replacement interval: Smoke and multi-sensor detectors after 5 years at the latest, or after 8 years with automatic contamination compensation and testing in accordance with the manufacturer’s specifications – details under Deadlines & standards.
- Change of detector series: New bases, different detector types or a changed number of detectors may constitute a significant modification – see expert inspection and fire brigade.
- EN 54 tested (as of 19.10.2026): All Hochiki (ESP, CDX) and Apollo detectors (Soteria, Discovery, XP95, Orbis, Series 65) listed as available are certified to EN 54-5 or EN 54-7, detectors with isolator additionally to EN 54-17. The detectors that are no longer available were approved under the EN 54 or VdS rules applicable when they were introduced; since 2008, CE marking to EN 54 has been mandatory for new detectors – which is why we only list currently certified types as replacements.
- Installation by a specialist company only: Replacement and repair of detectors in fire alarm systems required under building law are part of maintenance and are reserved for a specialist company certified to DIN 14675 – even if you only buy the detectors from us. Details under Legal situation.
- Order numbers are NSC item numbers and Apollo manufacturer’s codes (source: shop.nsc-sicherheit.de, last updated: 18.10.2026).
- Image credits and trademarks: Product images © NSC Sicherheitstechnik, Hochiki or Apollo Fire Detectors. The images serve solely to identify the detectors. Brand and product names are the property of their respective owners. Further information in the Legal notice.
Not sure which detector is installed at your site?
Send us your detector list or a photo of the type plate. We will name the suitable replacement and tell you whether new bases are needed.