Detectors
Replacing ESSER detectors: types, successors and bases
Which ESSER detectors from year of manufacture 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?
- ESSER: Type plate with article number, serial number and date of manufacture. According to Honeywell, IQ8Quad detectors store alarm and operating data in the detector. On IQ8Control and FlexES Control, the detector data of IQ8Quad and ES Detect detectors (including contamination level) can be retrieved via the operating unit or tools 8000. On aspirating smoke detectors, the date is on the detector module.
- 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.
Identify
Which ESSER detector do you have installed?
The images show the current ESSER designs. Within a series, many types look the same – what matters is the article number. It is on the type plate on the detector (usually on the back or on the edge of the detector) and on the base. It also tells you the series: 76xxxx / 78xxxx = Series 9000, 801xxx = Series 9200, 802xxx / 803xxx = IQ8Quad, 800xxx = ES Detect.
Images: Honeywell / ESSER. Examples shown; housing colour and labelling may differ depending on the type.
No longer available
Series 9000 and Series 9200: replacing detectors and bases
The conventional detectors of Series 9000 and the analogue detectors of Series 9200 were manufactured until roughly the mid-2000s and are no longer available. Smoke and multi-sensor detectors of these series have in any case exceeded the replacement interval under DIN 14675-1. The successors do not fit into the old bases (7814xx / 7815xx / 801593) – a new base is always required.
Series 9000 (conventional technology) → ES Detect
| Image | Old detector | Old item no. | Available? | Alternative detector (item no.) | New base? |
|---|---|---|---|---|---|
 | Ionisation smoke detector Series 9000 | 761062 / 781062 | no – discontinued | 800374 O²T multi-sensor detector ES Detect¹ | yes: 805590 |
| Fixed-temperature heat detector 58 °C Series 9000 | 761162 / 781162 | no – discontinued | 800171 Fixed-temperature heat detector ES Detect | yes: 805590 |
| Fixed-temperature heat detector 82 °C Series 9000 | 761167 / 781167 | no – discontinued | 800177 Fixed-temperature heat detector ES Detect, class B² | yes: 805590 |
| Rate-of-rise heat detector Series 9000 | 761262 / 781262 | no – discontinued | 800271 Rate-of-rise heat detector ES Detect | yes: 805590 |
| Optical smoke detector Series 9000 | 761362 / 781362 | no – discontinued | 800371 Optical smoke detector ES Detect or 800375 OTblue / 800374 O²T | yes: 805590 |
Series 9200 (analogue technology) → IQ8Quad
| Image | Old detector | Old item no. | Available? | Alternative detector (item no.) | New base? |
|---|---|---|---|---|---|
| Ionisation smoke detector Series 9200 | 801071 | no – discontinued | 802374 O²T multi-sensor detector IQ8Quad¹ | yes: 805590 |
| Fixed-temperature heat detector Series 9200 | 801171 | no – discontinued | 802171 Fixed-temperature heat detector IQ8Quad | yes: 805590 |
| Rate-of-rise heat detector Series 9200 | 801271 | no – discontinued | 802271 Rate-of-rise heat detector IQ8Quad | yes: 805590 |
| Optical smoke detector Series 9200 | 801371 | no – discontinued | 802371 Optical smoke detector IQ8Quad | yes: 805590 |
| OT multi-sensor detector Series 9200 | 801373 | no – discontinued | 802373 OT or 802375 OTblue IQ8Quad | yes: 805590 |
| O²T multi-sensor detector Series 9200 | 801374 | no – discontinued | 802374 O²T multi-sensor detector IQ8Quad | yes: 805590 |
| OTI multi-sensor detector Series 9200 | 801973 | no – discontinued | 802374 O²T or 802473 OTG (CO) IQ8Quad¹ | yes: 805590 |
| – | IQ8Quad Ex (i) optical smoke detector for hazardous (Ex) areas | 803371.EX | no – discontinued according to Honeywell | no direct successor in the ESSER range – solution on request (e.g. Ex detector with barrier) | on request |
| – | Ex detector Series 9100 (intrinsically safe, with Ex barrier Z969) | see rating plate | no – discontinued | Solution on request | on request |
¹ Ionisation and OTI detectors are no longer manufactured. Which detector replaces them depends on the fire detection and alarm concept – we will agree this with you. ² Class B according to EN 54-5; please check the response temperature at the place of use.
Current series
IQ8Quad and ES Detect: same detector, same base
Detectors of the IQ8Quad (analogue technology, esserbus) and ES Detect (conventional technology) series are still available. When replaced in accordance with the deadline, the detector is exchanged for the same type and the existing base 805590 or 805591 remains. For IQ8Quad there are also self-test detectors (-ST), which make on-site function testing easier.
| Image | Detectors | Item no. | Available? | Replace with | New base? |
|---|---|---|---|---|---|
| Fixed-temperature heat detector IQ8Quad | 802171 | yes | same type | no – 805590 remains |
| Fixed-temperature heat detector IQ8Quad, class B | 802177 | yes | same type | no |
| Rate-of-rise heat detector IQ8Quad | 802271 | yes | same type or 802271-ST self-test | no |
| Optical smoke detector IQ8Quad | 802371 | yes | same type or 802371-ST self-test | no |
| OT multi-sensor detector IQ8Quad | 802373 | yes | same type or 802373-ST self-test | no |
| O²T multi-sensor detector IQ8Quad | 802374 | yes | same type or 802374-ST self-test | no |
| OTblue multi-sensor detector IQ8Quad | 802375 | yes | same type or 802375-ST self-test | no |
| OTG multi-sensor detector (CO) IQ8Quad | 802473 | yes | same type | no |
| IQ8Quad O/So (optical, with sounder) | 802382 | yes | same type or self-test variant (-ST) | no – not in relay base 805591 |
| IQ8Quad O²T/F (with flashing beacon) | 802383 | yes | same type or self-test variant (-ST) | no – not in relay base 805591 |
| IQ8Quad O²T/So (with sounder) | 802384 | yes | same type or self-test variant (-ST) | no – not in relay base 805591 |
| IQ8Quad O²T/FSp (with flashing beacon and voice output) | 802385 | yes | same type or self-test variant (-ST) | no – not in relay base 805591 |
| IQ8Quad O²T/Sp (with voice output) | 802386 | yes | same type or self-test variant (-ST) | no – not in relay base 805591 |
| Fixed-temperature heat detector IQ8Quad without isolator (FSA) | 803171 | yes | same type | no |
| Rate-of-rise heat detector IQ8Quad without isolator (FSA) | 803271 | yes | same type | no |
| Optical smoke detector IQ8Quad without isolator (FSA) | 803371 | yes | same type | no |
| O²T multi-sensor detector IQ8Quad without isolator (FSA) | 803374 | yes | same type | no |
| Fixed-temperature heat detector ES Detect | 800171 | yes | same type | no – 805590 remains |
| Fixed-temperature heat detector ES Detect, class B | 800177 | yes | same type | no |
| Rate-of-rise heat detector ES Detect | 800271 | yes | same type | no |
| Optical smoke detector ES Detect | 800371 | yes | same type | no |
| O²T multi-sensor detector ES Detect | 800374 | yes | same type | no |
| OTblue multi-sensor detector ES Detect | 800375 | yes | same type | no |
IQ8Quad self-test detectors (-ST)
The self-test detectors of the IQ8Quad series test their sensors automatically, making on-site maintenance easier. They have only been in use for a few years – replacement is expected to be due from approx. 2033 at the earliest. They are replaced with the same type; the base 805590 remains.
| Image | Detectors | Item no. | Available? | Replace with | New base? |
|---|---|---|---|---|---|
| Rate-of-rise heat detector IQ8Quad self-test | 802271-ST | yes | same type | no – 805590 remains |
| Optical smoke detector IQ8Quad self-test | 802371-ST | yes | same type | no |
| OT multi-sensor detector IQ8Quad self-test | 802373-ST | yes | same type | no |
| O²T multi-sensor detector IQ8Quad self-test | 802374-ST | yes | same type | no |
| OTblue multi-sensor detector IQ8Quad self-test | 802375-ST | yes | same type | no |
| IQ8Quad O/So self-test (optical, with sounder) | 802382-ST | yes | same type | no – not in relay base 805591 |
| IQ8Quad O²T/F self-test (with flashing beacon) | 802383-ST | yes | same type | no – not in relay base 805591 |
| IQ8Quad O²T/So self-test (with sounder) | 802384-ST | yes | same type | no – not in relay base 805591 |
| IQ8Quad O²T/FSp self-test (with flashing beacon and voice output) | 802385-ST | yes | same type | no – not in relay base 805591 |
| IQ8Quad O²T/Sp self-test (with voice output) | 802386-ST | yes | same type | no – not in relay base 805591 |
Bases
Which new base replaces the old one?
| Image | Old base | Old item no. | New base (item no.) |
|---|---|---|---|
 | Standard base Series 9000 / 9200 | 781490 / 781590 | 805590 Detector base standard |
| Base with relay output Series 9000 | 781488 / 781588 | 805591 Detector base with relay contact (24 V) or 805592 for 48 V systems (ES Detect only) |
| Base with relay output Series 9200 | 781491 / 781591 | 805591 Detector base with relay contact³ |
| Base with optocoupler output | 781492 / 781592 | no direct successor – solution on request |
| Base with isolator Series 9200 | 781493 / 781593 / 801493 / 801593 | 805590 – the isolator is integrated in the IQ8Quad detector |
³ The relay base 805591 is not suitable for IQ8Quad detectors with integrated sounder (802382 to 802386).
aspirating smoke detectors (ASD)
ESSER aspirating smoke detectors on the esserbus
ESSER offers aspirating smoke detectors with an integrated esserbus coupler: TITANUS EB (WAGNER technology), FAAST LT EB and VESDA-E EBTI (Xtralis/Honeywell technology). They run directly on the esserbus or esserbus-PLus loop and are programmed with tools 8000. All devices are tested to EN 54-20. When replaced in accordance with the deadline under DIN 14675, the detector module or the replacement detector is exchanged – not the base unit.
No longer in the ESSER range
| Image | Old unit | Old item no. | Available? | Alternative | New pipe network? |
|---|---|---|---|---|---|
 | Compact unit TITANUS PRO SENS EB (with detector module) | 801515.10 | no – no longer in the catalogue | Base unit TITANUS PRO SENS 2 EB (801522.10) + detector module | according to system design¹ |
| Base unit TITANUS PRO SENS EB (1 pipe) | 801521.10 | no – no longer in the catalogue | Base unit TITANUS PRO SENS 2 EB (801522.10) | according to system design¹ |
 | Base unit TITANUS TOP SENS 1 EB / EB.SL (low-noise fan) | 801531.10 / 801531.10.SL | no – no longer in the catalogue | TITANUS PRO SENS 2 EB, FAAST LT-200 EB or VESDA-E EBTI | according to system design¹ |
| Base unit TITANUS TOP SENS 2 EB (2 pipes) | 801532.10 | no – no longer in the catalogue | TITANUS PRO SENS 2 EB, FAAST LT-200 EB 2 or VESDA-E EBTI | according to system design¹ |
| Detector module DM-TP-50-LE (TITANUS PRO SENS EB) | 801523.10 | no – no longer in the catalogue | DM-TP-10L (801524.10) according to system design | according to system design¹ |
| Detector modules DM-TT-50-LE / DM-TT-10-LE / DM-TT-01-LE (TITANUS TOP SENS EB) | 801533.10 / 801534.10 / 801535.10 | no – no longer in the catalogue | Changeover to current unit | according to system design¹ |
Current ESSER aspirating smoke detectors
| Image | Unit | Item no. | Available? | Replaced part | Note |
|---|---|---|---|---|---|
| Base unit TITANUS PRO SENS 2 EB, 2 pipes, with esserbus coupler (VdS G 206118) | 801522.10 | yes | detector module | esserbus coupler 808623 integrated |
| Detector module 0.10 %/m, type DM-TP-10L | 801524.10 | yes | same type | for TITANUS PRO SENS EB |
| Detector module 0.015 %/m, type DM-TP-01L | 801525.10 | yes | same type | for TITANUS PRO SENS EB |
| – | FAAST LT-200 EB, 1 channel, loop-capable | 801711.10 | yes | Replacement detector F-SEN-SSE | Replacement filter FL-IF-2 |
| – | FAAST LT-200 EB 2, 2 channels, loop-capable | 801722.10 | yes | Replacement detector F-SEN-SSE | Replacement filter FL-IF-2 |
| – | FAAST FLEX, 1 pipe or 2 pipes, with relay | FLX-010 / FLX-020 | yes | according to manufacturer’s specifications | Connection via relay / coupler |
 | VESDA-E VEU with LEDs, esserbus | VEU-A00-EBTI | yes | according to manufacturer’s specifications | up to 4 status messages via esserbus |
| VESDA-E VEP 4 pipes with 3.5″ display, esserbus | VEP-A10-P-EBTI | yes | according to manufacturer’s specifications | on IQ8Control without pre-alarm |
| VESDA-E VEP single pipe with LEDs, esserbus | VEP-A00-1P-EBTI | yes | according to manufacturer’s specifications | – |
| VESDA Laser Industrial with VESDAnet | VLI-885 | yes | according to manufacturer’s specifications | Connection via interface |
Article numbers according to the online ESSER product catalogue (esser-systems.com) and ESSER product information 795810 (05/2011). ¹ When changing the base unit, or changing to a detector module with a different sensitivity, the pipe network must be recalculated in accordance with EN 54-20; this is generally a significant modification. Further VESDA types can be found on the Xtralis page, TITANUS detector modules on the WAGNER page.
Special detectors
ESSER: wireless, Ex, duct and linear detectors
In addition to IQ8Quad and ES Detect, ESSER offers wireless detectors (IQ8Wireless), Ex detectors, duct detectors and linear beam smoke detectors. Aspirating smoke detectors can be found in the section above.
| Image | Detectors | Item no. | Available? | Replace with | Note |
|---|---|---|---|---|---|
 | IQ8Wireless radio base – turns an IQ8Quad detector into a wireless detector (EN 54-25) | 805593.10 | yes | Detector in the radio base with the same IQ8Quad type; batteries as specified by the manufacturer | Radio base remains |
 | IQ8Wireless radio gateway for detectors (connection to the esserbus) | 805594.10 | yes | – | Gateway remains |
| – | Optical Ex smoke detector IQ8Quad Ex (i) | 803371.EX | no – discontinued | see table “No longer available” | Ex barrier Z969 |
 | Ex flame detectors FSL100-IR3 (triple IR), FSL100-UV and FSL100-UVIR (EN 54-10, ATEX) | FSL100-IR3 / -UV / -UVIR | yes | same type | Bracket FSL100-SM21 |
| – | UniVario flame detector UV or triple IR (EN 54-10) | 782311 / 782315 | yes | same type | Base UniVario 783313 |
 | Duct detector kit for IQ8Quad or ES Detect smoke detectors | 781463 | yes | inserted smoke detector according to deadline | housing and tube remain |
 | Linear beam smoke detector LRMX (EN 54-12) | 761400.10 | yes | same type | Reflector remains |
| LRMX with anti-fogging and heating (EN 54-12) | 761410 | yes | same type | – |
 | LRMX blue with app control (EN 54-12) | 761423 | yes | same type | – |
| – | OSID imaging linear beam smoke detector – receiver 7° / 80°, light sources standard/high power (EN 54-12) | OSI-10 / OSI-90 / OSE-SPW / OSE-HPW | yes | same type | – |
| – | Conventional linear beam smoke detector OSI-RE (EN 54-12) | OSI-RE | yes | same type | – |
Article numbers according to the online ESSER product catalogue (esser-systems.com, as of 10/2026). Wireless detectors: battery replacement as specified by the manufacturer; linear beam smoke detectors and flame detectors are inspected as specified by the manufacturer.
Important
Before ordering
- Check the panel: Whether IQ8Quad or ES Detect detectors can be operated on your fire alarm control panel depends on the panel, loop or line technology 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 IQ8Quad, ES Detect and self-test detectors listed as available are certified to EN 54-5 (heat) or EN 54-7 (smoke), those with integrated isolator also to EN 54-17 and those with sounder/flashing beacon additionally to EN 54-3/-23; the aspirating smoke detectors to EN 54-20. Exception: the IQ8Quad Ex (i) has been discontinued; for hazardous (Ex) areas, the replacement must be clarified individually. 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 according 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 the article numbers of the manufacturer ESSER by Honeywell (last updated: 18.10.2026, source: esser-systems.com). The links lead to the manufacturer’s product search.
- Image credits and trademarks: Product images © Honeywell / ESSER. The images serve solely to identify the detectors. Brand and product names are the property of their respective owners. Further details 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.