Detectors
Labor Strauss: types, successors and bases
Which detectors are installed in Labor Strauss systems: Labor Strauss’s own FI750 / FI700 series, the 200-Advanced series and Apollo detectors (XP95, Discovery, Soteria) – with order numbers where the manufacturer publishes them.
Labor Strauss
Which Labor Strauss detector do you have?
Labor Strauss (Austrian family business; in Germany including Labor Strauss Sicherungsanlagenbau GmbH, Labor Strauss Sicherheitssysteme GmbH and MEP-Gefahrenmeldetechnik GmbH) does not use Apollo detectors alone. Systems of the brand contain three detector families with different communication protocols. The detectors are not interchangeable – what matters is the protocol of the fire alarm control panel and of the loop the detector is connected to.
Series FI750 / FI700 – Labor Strauss’s own development
- Own digital Labor Strauss protocol, up to 240 devices per loop.
- Detector types: optical smoke detector, optical-thermal detector and heat detector; DECORLINE as design variant.
- Labor Strauss does not publish order numbers in its public documents. Send us a photo of the type plate and we will name the replacement and the matching base.
Series 200-Advanced / 200 – System Sensor protocol
- System Sensor protocol, up to 159 detectors and 159 modules per loop.
- Detectors: optical ND22051EI, optical-thermal DV22051TEI, multi-criteria PTIR 22051TLEI and COPTIR 2251CTLE, heat 52051REI, 52051EI and 52051HTEI, laser smoke detector 72051EI.
- Bases: B501AP (standard), B524HTR (heated), B524IEFT-1 (with isolator); duct detector housing DNRE.
Series XP95 / Discovery / Soteria – Apollo protocol
- Apollo protocol, up to 126 devices per loop. Background, older types and successors are under NSC, Hochiki & Apollo.
- Detectors: optical 55000-620, heat 55000-420, flush-mounted optical FL5100-600 and FL6100-600, optical SA5100-600, optical-thermal SA5100-700, heat SA5100-400.
- Bases: SA5000-200, 45681-210, with isolator 45681-284, with relay 45681-242.
You can tell which series is installed from the detector’s type plate and from the control panel configuration (loop protocol). Details and order numbers according to the product pages of the Labor Strauss Group (laborstrauss.com), as of 1 November 2026.
Age of the detector
How old is the detector – how long has it been in operation?
- Logbook and records (decisive): Operating time counts from commissioning of the detector. The date is in the logbook, in the installer’s commissioning or acceptance record or in the last replacement record.
- Type plate on the detector: The label shows type, serial number and date of manufacture or a date code. If no commissioning date is documented, we conservatively count from the date of manufacture.
- Reading out via the control panel: Depending on the system and software version, detector data can be retrieved via the control unit or programming software. We do this during the inventory using your programming file.
This gives the replacement interval under DIN 14675: generally 5 years, 8 years for detectors with contamination compensation and testing according to the manufacturer’s specification – details under Deadlines & standards.
Notes
Before ordering
- Changing the detector series: New bases, other detector types or a changed number of detectors can be a substantial change – see Expert acceptance inspection and Fire brigade.
- Installation by a specialist company only: Replacing and repairing detectors in fire alarm systems required by building law is part of maintenance and reserved for a company certified to DIN 14675 – even if you only buy the detectors from us. Details under Legal situation.
- Trademarks: All manufacturer, brand and product names mentioned are the property of their respective owners and serve for identification only.
Not sure which detector is installed?
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.