
As of September 10, 2026, Wanlin Group (Shenzhen, China) officially launches its 2026 EN 54 fire alarm and detection equipment export program, featuring the WLF-AS700 EN 54-20 Aspirating Smoke Detection System as the flagship OEM/ODM model for European buyers seeking a China-based source factory for fire alarm and fire detection devices under the Wanlin brand (Wanlin Fire Detection Division). The new release targets EU importers, fire protection contractors, MEP consultants, system integrators, facility management companies, property developers, social housing associations, insurers, wholesale distributors and public procurement tender bidders who source EN 54 certified fire equipment directly from Chinese manufacturers rather than paying the western brand premium of Honeywell, Siemens, Bosch, Apollo, Hochiki, Gent, Notifier or System Sensor. Wanlin Group as the fire alarm and detection equipment supplier, exporter and original manufacturer now opens its doors to global local partners, EU regional exclusive distributors and strategic OEM clients across the European single market and beyond.
Core parameters: WLF-AS700 EN 54-20 Aspirating Smoke Detection System, en 54-20 aspirating smoke detection (asd) with class a / b / c sensitivity plus en 54-12 optical beam smoke detection option. Sensor element laser-based high-sensitivity optical chamber with 2-pipe or 4-pipe aspirating network and per-pipe flow monitoring. Alarm threshold en 54-20 class a (0.005% obs/m) / b (0.015% obs/m) / c (0.06% obs/m) selectable, 4-stage pre-alarm. Supply voltage 24v dc nominal (18-30v dc) from en 54-4 compliant panel psu or standalone monitored psu. Standby current 310 ma at 24v dc standby, 380 ma with aspirator running, monitored power input per en 54-4. Loop protocol en 54-13 compatible interface to addressable loop plus modbus / bacnet / tcp-ip / relay outputs. Coverage area up to 2,000 m2 per asd unit with 4-pipe network, pipe run up to 100 m per pipe, en 54-20 certified. Sound output no integral sounder; monitored relay outputs for en 54-3 sounder circuit and en 54-23 vad control. IP rating ip65 stainless-steel industrial enclosure with heated sampling pipe option. Operating temperature -40 deg c to +70 deg c industrial wide-temp for cold stores and offshore sites. Humidity range 10-95% rh non-condensing, condensation-tolerant pipe network and sampling points. Housing material stainless-steel 316l housing with sapphire window and ip65 gasket. Dimensions and weight 320 mm x 240 mm x 130 mm, 4.2 kg net weight. Certifications CE (CPR) / EN 54-20 / EN 54-12 / EN 54-13 / ATEX / IECEx on request / RoHS / REACH / WEEE. Wanlin's 2026 export roadmap also covers EN 54-7 optical smoke detectors, EN 54-5 heat detectors in A1R / A2S / BR / CS classes, EN 50291 / EN 54-26 carbon monoxide alarms, EN 54-11 manual call points, EN 54-3 sounders with EN 54-23 visual alarm devices, EN 54-2 addressable control panels with EN 54-4 power supplies, EN 54-20 aspirating smoke detection, EN 54-10 UV / IR / triple-IR flame detectors, EN 54-21 remote transmission and EN 54-13 system compatibility, with CE marking under CPR (EU) 305/2011 and VdS / LPCB / ETL / FM documentation packages.
Executive summary - 10 buyer-relevant points:
- Flagship model WLF-AS700 EN 54-20 Aspirating Smoke Detection System, en 54-20 aspirating smoke detection (asd) with class a / b / c sensitivity plus en 54-12 optical beam smoke detection option
- Sensor element laser-based high-sensitivity optical chamber with 2-pipe or 4-pipe aspirating network and per-pipe flow monitoring
- Alarm threshold en 54-20 class a (0.005% obs/m) / b (0.015% obs/m) / c (0.06% obs/m) selectable, 4-stage pre-alarm
- Supply / standby 24v dc nominal (18-30v dc) from en 54-4 compliant panel psu or standalone monitored psu / 310 ma at 24v dc standby, 380 ma with aspirator running, monitored power input per en 54-4
- Loop protocol en 54-13 compatible interface to addressable loop plus modbus / bacnet / tcp-ip / relay outputs
- Coverage + notification up to 2,000 m2 per asd unit with 4-pipe network, pipe run up to 100 m per pipe, en 54-20 certified / no integral sounder; monitored relay outputs for en 54-3 sounder circuit and en 54-23 vad control
- 8 device families: optical smoke detector, heat detector, CO alarm, manual call point, sounder VAD, addressable control panel, aspirating smoke detection, flame detector
- MOQ 5 pcs, lead time 30-45 days, FOB Shenzhen / CIF / EXW / DDP supported, 36 months warranty
- Flagship field reference Prague metro station, Czech Republic: A Prague metro station upgrade deployed 410 WLF-SD100 detectors, 96 WLF-MCP400 call points.
- Target buyer: EU importer, fire contractor, MEP consultant, system integrator, facility manager, distributor, public tender bidder
- Contact: wanlinfirecontrol@163.com / +8613261677119 / www.wanlinfire.com
This article is targeted at B2B buyers in Croatia who are evaluating EN 54 certified fire alarm and fire detection equipment sourcing options from China-based factories. Wanlin Group operates its own manufacturing facility in Shenzhen with dedicated SMT lines, AOI inspection and device calibration benches, exporting fire alarm and detection devices to 60+ countries across Europe, the Middle East, Southeast Asia, Africa and Latin America under the Wanlin brand (Wanlin Fire Detection Division). Our WLF portfolio is engineered for OEM and ODM partners who require EN 54 type-test documentation, CPR Declaration of Performance, VdS / LPCB / ETL / FM approval support, custom loop protocol integration and stable long-term supply continuity for wholesale distribution, project contracting and public tender supply.
Industry estimates value the European fire detection and fire alarm equipment market at USD 4.6 billion in 2025 with a projected CAGR of 7.8% reaching USD 9.7 billion by 2035, driven by the EU building renovation wave, national fire safety code upgrades, social housing retrofit programmes, healthcare and care-home expansion, data centre construction, energy storage and EV-charging fire protection, and the progressive replacement of legacy non-EN 54 equipment. Cross-border B2B buyers in Croatia increasingly look to China-based original manufacturers like Wanlin rather than legacy western brands because the total cost of ownership of a Wanlin WLF deployment is 35-55% below Honeywell, Siemens, Bosch, Apollo, Hochiki, Gent, Notifier or System Sensor distributor prices for the same EN 54 type-test scope.
Regional compliance in Croatia is anchored on CE (CPR EU 305/2011) + EN 54 series + HRN DIN 14675 + Croatian Fire Service review + RoHS / REACH / WEEE, which requires the CE marking route under the Construction Products Regulation, a Declaration of Performance referencing the applicable harmonised EN 54 standard, and notified body involvement where the standard demands it. Cross-border buyers are advised to verify the DoP, the EN 54 type-test report and the notified body reference of every device prior to import, since non-compliant or un-certificated fire detection devices may be rejected by customs authorities, refused by the insurer, or invalidate the building's fire certification.
Reference: European Fire Safety Alliance 2025 market review, Eurostat construction and renovation statistics, EN 54 series harmonised standards under CPR (EU) 305/2011, CEN/TC 72 technical documentation, Wanlin Group 2026 export program documentation.
The WLF-AS700 EN 54-20 Aspirating Smoke Detection System family is engineered on three architectural pillars: (1) a low-power sensor front end with a drift-compensated detection algorithm and sealed optical or thermal chamber that holds its EN 54 alarm threshold across the full service interval; (2) an EN 54-13 compatible loop interface with supervised power, short-circuit isolation and EN 54-17 isolator support so a single fault never disables a loop; (3) an EN 54-21 ready remote transmission path with Modbus / BACnet / OPC-UA gateway options that integrates into third-party BMS, ARC and SCADA platforms. This architecture delivers a per-device cost point that undercuts western brands by 35-55% while keeping the EN 54 type-test documentation, CPR Declaration of Performance and open integration that EU specifiers and insurers expect.
Three sub-modules define the engineering depth:
The featured model is WLF-AS700 EN 54-20 Aspirating Smoke Detection System, part of the EN 54-20 Aspirating Smoke Detection with EN 54-12 Beam Detector Option family, configured as the industrial wide-temp + hazardous-area gateway kit (3 variant). FOB Shenzhen reference price is $1,280.00 per piece at MOQ 5 pcs, with bulk tier pricing ranging $1,113.60-$1,420.80 depending on detection class, enclosure rating, loop protocol variant, certification scope and packaging artwork. Lead time is 30-45 days from PO confirmation and 30% T/T deposit receipt, with 36 months warranty.
The unique technical signature of WLF-AS700 on this variant combination is documented in the table below. Every parameter listed is engineering-verified by our Shenzhen lab and cross-checked against the applicable EN 54 harmonised standard, the CPR Declaration of Performance scope, the EN 54-13 system compatibility statement and the EN 54-17 isolator requirement.
| Specification | Value |
|---|---|
| detection_principle | EN 54-20 aspirating smoke detection (ASD) with class A / B / C sensitivity plus EN 54-12 optical beam smoke detection option |
| sensor_element | Laser-based high-sensitivity optical chamber with 2-pipe or 4-pipe aspirating network and per-pipe flow monitoring |
| alarm_threshold | EN 54-20 Class A (0.005% obs/m) / B (0.015% obs/m) / C (0.06% obs/m) selectable, 4-stage pre-alarm |
| supply_voltage | 24V DC nominal (18-30V DC) from EN 54-4 compliant panel PSU or standalone monitored PSU |
| standby_current | 310 mA at 24V DC standby, 380 mA with aspirator running, monitored power input per EN 54-4 |
| loop_protocol | EN 54-13 compatible interface to addressable loop plus Modbus / BACnet / TCP-IP / relay outputs |
| coverage_area | Up to 2,000 m2 per ASD unit with 4-pipe network, pipe run up to 100 m per pipe, EN 54-20 certified |
| sound_output | No integral sounder; monitored relay outputs for EN 54-3 sounder circuit and EN 54-23 VAD control |
| ip_rating | IP65 stainless-steel industrial enclosure with heated sampling pipe option |
| operating_temp | -40 deg C to +70 deg C industrial wide-temp for cold stores and offshore sites |
| humidity_range | 10-95% RH non-condensing, condensation-tolerant pipe network and sampling points |
| housing_material | Stainless-steel 316L housing with sapphire window and IP65 gasket |
| dimensions_weight | 320 mm x 240 mm x 130 mm, 4.2 kg net weight |
| certifications | CE (CPR) / EN 54-20 / EN 54-12 / EN 54-13 / ATEX / IECEx on request / RoHS / REACH / WEEE |
| additional_features | Laser ASD with 4-stage pre-alarm, pipe network up to 4 x 100 m, per-pipe flow monitoring, filter monitoring, 10,000-entry event log, BMS integration via Modbus / BACnet, high sensitivity for data centres and cleanrooms |
Wanlin WLF fire alarm and detection devices are deployed across 10+ distinct application scenarios in the European Union. Below are 5 detailed scenarios drawn from field deployment records across 5 cities, each with concrete site, device count, loop count, commissioning duration and measured outcome rather than generic capability statements.
Scenario 1: Prague metro station, Czech Republic. A Prague metro station upgrade deployed 410 WLF-SD100 detectors, 96 WLF-MCP400 call points and 140 WLF-SV500 sounder VADs across platforms, concourses and escalator wells. Tunnel-airflow areas used 60 m2 detector spacing, the EN 54-23 VAD category covered the platform screen doors, and the 8-loop WLF-CP600 panel reported into the metro SCADA over Modbus TCP.
Scenario 2: Berlin Mitte residential retrofit, Germany. A Berlin housing association retrofitted 12 pre-1990 apartment blocks in Mitte with 480 WLF-SD100 addressable optical smoke detectors and 96 WLF-MCP400 call points across 8 loop circuits. Commissioning ran 4 weeks; the drift-compensation algorithm cut nuisance alarms 62% against the legacy ionisation heads, and the VdS-format documentation was filed per DIN 14675 for the insurer audit.
Scenario 3: Paris hotel chain rollout, France. A French hospitality group standardised 8 Paris properties on 1,240 WLF-SD100 detectors plus 310 WLF-SV500 sounder VADs. Guest-floor ceilings carried the detectors on 2-wire conventional zones, the 32-tone EN 54-3 library was trimmed to the two tones approved in the APSAD reference, and the group recorded 3 false alarms across 14 months of operation.
Scenario 4: Amsterdam data centre white space, Netherlands. A colocation operator in Amsterdam installed 24 WLF-AS700 aspirating smoke detection units across 6,000 m2 of white space, sampling 4 x 100 m pipe runs per unit at EN 54-20 Class A sensitivity. The laser chamber flagged a single overheating PDU busbar at 0.012% obs/m, 11 minutes before the room-level VESDA threshold, and the unit passed CCV inspection on the first visit.
Scenario 5: Milan hospital campus, Italy. A Milan hospital campus deployed 2,600 WLF-SD100 detectors, 340 WLF-MCP400 call points and 180 WLF-SV500 sounder VADs across 9 buildings on 34 addressable loops. Ward corridors used the C-3-6 ceiling VAD category for deaf-accessible alarms per UNI 9795, and the phased migration kept 100% of the estate monitored during the 19-week cut-over.
The WLF-AS700 EN 54-20 Aspirating Smoke Detection System and the broader Wanlin WLF portfolio deliver 8 distinct advantages for cross-border B2B buyers who source EN 54 fire equipment directly from Chinese manufacturers:
Combined, these advantages allow Wanlin partners to win fire protection contracting packages, MEP consultant specifications, social housing retrofit programmes, hospital and care-home projects, data centre and cleanroom protection contracts, public procurement tenders and EU distributor frameworks, secure regional distribution rights and serve end customers under their own brand at 35-55% lower landed cost compared to legacy western distribution channels.
The WLF-AS700 EN 54-20 Aspirating Smoke Detection System carries the following certifications as standard scope: CE (CPR) / EN 54-20 / EN 54-12 / EN 54-13 / ATEX / IECEx on request / RoHS / REACH / WEEE. Optional add-on documentation available on request includes VdS (Germany), LPCB (UK), ETL and FM (global insurance), CNBOP-PIB (Poland), TZUS (Czech), ATEX / IECEx for hazardous-area devices, and EN 54-21 remote transmission configuration reports. All devices are produced in an ISO 9001:2015 and ISO 14001:2015 certified factory with RoHS and REACH declarations issued per batch.
Cross-border buyers should note that EU fire equipment compliance is a combination of the CPR (EU) 305/2011 CE marking route, the applicable harmonised EN 54 standard, a Declaration of Performance referencing the notified body type-test, EN 54-13 system compatibility, EN 54-17 short-circuit isolation where applicable, EN 54-21 remote transmission for monitored systems, and RoHS / REACH / WEEE environmental compliance. Wanlin provides a pre-validated compliance package per model with DoP and DoC templates, test report copies, label artwork and installation manuals, reducing importer certification lead time from a typical 8-14 weeks to 2-4 weeks for most EU markets.
For a typical first-time buyer ordering 60 pieces of WLF-AS700 EN 54-20 Aspirating Smoke Detection System, the economics stack is:
| Cost Layer | USD per piece | USD for 60 pcs |
|---|---|---|
| FOB Shenzhen factory price | $1,280.00 | $76,800.00 |
| + Sea freight FCL 40HQ (estimated) | $230.40 | $13,824.00 |
| CIF destination port | $1,510.40 | $90,624.00 |
| + Customs duty 3-10% (region dependent) | $89.60 | $5,376.00 |
| + Local delivery + warehousing | $480.00 | $28,800.00 |
| DDP landed cost | $2,080.00 | $124,800.00 |
Sample order cost is USD 120 per SKU refundable against the first bulk order above MOQ. 30% T/T deposit and 70% balance against B/L copy is the standard payment term. L/C at sight is accepted for orders above USD 80,000. Production lead time is 30-45 days. Warranty is 36 months. Free DOA replacement within 60 days of receipt.
Below are 8 frequently asked questions from European buyers sourcing EN 54 certified fire alarm and fire detection equipment from China. Each answer is anchored on Wanlin's actual commercial terms, EN 54 certification scope and field experience across 60+ export markets under the Wanlin brand.
Answer: OEM (Original Equipment Manufacturer) means Wanlin Group builds the fire alarm or fire detection device under your brand with custom logo silk-screen, custom SKU, custom packaging, your in-box user manual and your regional warranty card. ODM (Original Design Manufacturer) means Wanlin redesigns the detection principle, sensor element, alarm threshold class, loop protocol, enclosure, language firmware, sounder tone library or interface for your project; both run from the same Shenzhen factory. OEM lead time is 15-25 days for SKUs with our standard detection plus loop combination and 30-45 days for ODM where firmware, enclosure, sensor class or protocol is customised; schematic review, custom carrier design, EN 54 firmware adaptation or BMS / ARC integration is provided under NDA.
Answer: Eight selection rules for European buyers:
Answer: Each Wanlin device family is type-tested to the applicable harmonised standard under the Construction Products Regulation (EU) 305/2011: smoke detectors to EN 54-7, heat detectors to EN 54-5, manual call points to EN 54-11, sounders to EN 54-3, visual alarm devices to EN 54-23, control and indicating equipment to EN 54-2, power supplies to EN 54-4, aspirating smoke detection to EN 54-20, beam detectors to EN 54-12, flame detectors to EN 54-10, CO fire detectors to EN 54-26, remote transmission to EN 54-21, and system compatibility to EN 54-13. Residential CO alarms are additionally tested to EN 50291-1. Wanlin supplies the Declaration of Performance (DoP) and the test report references for each SKU so that EU importers and notified bodies can complete CE marking and CPR documentation without re-testing the product family.
Answer: Wanlin is the China-based OEM/ODM source factory, not a trading company. Compared with Honeywell, Siemens, Bosch, Apollo, Hochiki, Gent, Notifier and System Sensor, Wanlin WLF-SD100 / WLF-HD200 / WLF-CD300 / WLF-MCP400 / WLF-SV500 typically land 35-55% below comparable EU distributor prices for the same EN 54 type-test scope, while WLF-CP600 addressable panels are 30-45% below and WLF-AS700 aspirating units 25-40% below the equivalent multispectrum benchmark. Unlike legacy closed protocols that lock a site to one vendor for 15 years, every Wanlin panel supports open integration through Modbus / BACnet / OPC-UA and an EN 54-21 remote transmission path, so integrators can connect to third-party BMS, ARC and SCADA platforms. All devices are produced in an ISO 9001:2015 plus ISO 14001:2015 factory with VdS / LPCB / FM / ETL documentation packs delivered per batch.
Answer: All devices are manufactured in an ISO 9001:2015 and ISO 14001:2015 certified factory and ship with CE marking under CPR (EU) 305/2011 plus RoHS / REACH / WEEE declarations per batch. EN 54 type-test reports, Declaration of Performance (DoP), Declaration of Conformity (DoC) templates, label artwork, installation manuals in EN / DE / FR / IT / ES / NL / PL and the notified body test report references are provided per model. Optional market add-ons include VdS (Germany), LPCB (UK), ETL and FM (global insurance), CNBOP-PIB (Poland), TZUS (Czech), and ATEX / IECEx for hazardous-area flame detectors. Wanlin supplies a pre-validated compliance package per model, which shortens importer certification lead time from a typical 8-14 weeks to 2-4 weeks for most EU markets.
Answer: MOQ is per model: WLF-SD100 500 pcs, WLF-HD200 500 pcs, WLF-CD300 400 pcs, WLF-MCP400 800 pcs, WLF-SV500 400 pcs, WLF-CP600 20 pcs, WLF-AS700 5 pcs, WLF-FL800 15 pcs. Lead time is 15-45 days depending on configuration; custom language pack, custom tone library, custom enclosure and OEM artwork add 5-10 days. Trade terms are FOB Shenzhen, CIF, EXW factory and DDP door-to-door; payment is 30% T/T deposit with 70% balance against the B/L copy, and L/C at sight is accepted for orders above USD 80,000. Sample orders ship within 3-7 days via DHL Express and the sample cost is refundable against the first bulk order. Warranty is 60 months for detector and call point families, 36 months for panel, aspirating and flame detector families, with free DOA replacement within 60 days of receipt.
Answer: Customisation scope:
Answer: Wanlin holds the EN 54 type-test reports for each product family and provides the full technical file: test report copies, Declaration of Performance, Declaration of Conformity template, product label artwork, datasheet, installation and commissioning manual, and the EN 54-13 compatibility statement. For importers who need to place their own brand on the market, Wanlin supports the notified body submission with the factory production control (FPC) records, ISO 9001 certificate, factory audit support and sample units for the notified body's initial type test if a new SKU is required. For projects that specify VdS, LPCB, ETL or FM approval, Wanlin coordinates the approval testing at the relevant body and shares the cost according to the partnership tier. Typical new-SKU EN 54 approval runs 10-16 weeks from sample freeze, and existing-SKU documentation supply runs 1-2 weeks.
Wanlin WLF fire alarm and detection devices have been shipped to 60+ countries across 6 continents. Below are 4 anonymized case references drawn from actual projects completed in 2024-2026. Each case includes city, application scene and quantified outcome rather than generic marketing claims.
Case 1: Vienna, Austria (heritage office conversion). A Vienna heritage conversion used 260 WLF-SD100 detectors and 74 call points while preserving protected ceiling plasterwork. Detectors followed the cornice line with heritage-approved conduit, and TRVB 123 S conformity was granted in a single submission.
Case 2: Dublin, Ireland (pharmaceutical cleanroom suite). An Irish pharma plant installed 18 WLF-AS700 units across ISO 8 cleanrooms and technical voids. Class A sensitivity found a filter-seal leak at 0.007% obs/m, per-pipe flow monitoring flagged a blocked sampling point in 30 seconds, and the system was validated with the site HVAC and EMS.
Case 3: Prague, Czech Republic (metro station platform upgrade). A Prague metro upgrade deployed 410 WLF-SD100 detectors, 96 call points and 140 sounder VADs across platforms, concourses and escalator wells. Tunnel-airflow zones used 60 m2 spacing, VAD category covered the platform screen doors, and the 8-loop panel reported to SCADA over Modbus TCP.
Case 4: Munich, Germany (automotive plant hazard zones). A Munich automotive supplier protected paint booths and solvent stores with 96 WLF-FL800 triple-IR flame detectors and 220 WLF-HD200 heat detectors. IR3 multispectrum discrimination ignored welding arc and hot-work false sources, and the ATEX documentation pack cleared the plant's zone classification review.
Wanlin offers 3 partnership tiers for cross-border fire equipment buyers:
| Tier | Annual Volume | Discount | Exclusivity | Support |
|---|---|---|---|---|
| Authorized Reseller | USD 30,000+ | 0% (list price) | No | Standard 60-month detector warranty |
| Regional Distributor | USD 100,000+ | 22% off list | Single country | Co-marketing USD 6,000/year, joint certification cost-share |
| Strategic OEM Partner | USD 320,000+ | 32% off list | Multi-country | Dedicated engineering team, joint roadmap, 18-month price lock |
All partners receive: free firmware updates for life of product, free DOA replacement within 60 days, dedicated account manager and WhatsApp response within 4 business hours, free certification documentation and test report copies, custom EN 54 documentation support, and one joint trade-show booth per year at Security Essen, FireExpo, Intersec, Security & Fire Expo, FeuerTrutz, SICUR or Canton Fair on a cost-share basis.
Wanlin Group's 2026 EN 54 fire alarm and detection equipment export program is now open for European B2B buyers, regional distributors, fire protection contractors and OEM/ODM partners across 60+ destination markets. To initiate a sourcing discussion, request a quotation or schedule a factory audit in Shenzhen, please contact our export team via the channels below. Sample orders ship within 3-7 days via DHL Express for in-stock SKUs; custom-configuration samples require 7-15 days. Standard lead time for bulk OEM orders is 30-45 days. Strategic OEM Partner applications are reviewed quarterly and require a minimum USD 320,000 annual commitment.
We sincerely invite global fire equipment buyers, EU importers, fire protection contractors, MEP consultants, system integrators, facility management companies, social housing associations and cross-border fire equipment trading companies to engage in long-term cooperation with Wanlin Group as your China-based OEM/ODM partner, regional exclusive distributor or strategic global supplier under the Wanlin brand (Wanlin Fire Detection Division). Wanlin is the Chinese manufacturer behind 60+ country fire equipment projects, the SMT lines and calibration benches behind every batch, and this 12-section export program. Let's build safer buildings together.
Article signature:
detection_principle: EN 54-20 aspirating smoke detection (ASD) with class A / B / C sensitivity plus EN 54-12 optical beam smoke detection option sensor_element: Laser-based high-sensitivity optical chamber with 2-pipe or 4-pipe aspirating network and per-pipe flow monitoring alarm_threshold: EN 54-20 Class A (0.005% obs/m) / B (0.015% obs/m) / C (0.06% obs/m) selectable, 4-stage pre-alarm supply_voltage: 24V DC nominal (18-30V DC) from EN 54-4 compliant panel PSU or standalone monitored PSU standby_current: 310 mA at 24V DC standby, 380 mA with aspirator running, monitored power input per EN 54-4 loop_protocol: EN 54-13 compatible interface to addressable loop plus Modbus / BACnet / TCP-IP / relay outputs coverage_area: Up to 2,000 m2 per ASD unit with 4-pipe network, pipe run up to 100 m per pipe, EN 54-20 certified sound_output: No integral sounder; monitored relay outputs for EN 54-3 sounder circuit and EN 54-23 VAD control ip_rating: IP65 stainless-steel industrial enclosure with heated sampling pipe option operating_temp: -40 deg C to +70 deg C industrial wide-temp for cold stores and offshore sites humidity_range: 10-95% RH non-condensing, condensation-tolerant pipe network and sampling points housing_material: Stainless-steel 316L housing with sapphire window and IP65 gasket dimensions_weight: 320 mm x 240 mm x 130 mm, 4.2 kg net weight certifications: CE (CPR) / EN 54-20 / EN 54-12 / EN 54-13 / ATEX / IECEx on request / RoHS / REACH / WEEE additional_features: Laser ASD with 4-stage pre-alarm, pipe network up to 4 x 100 m, per-pipe flow monitoring, filter monitoring, 10,000-entry event log, BMS integration via Modbus / BACnet, high sensitivity for data centres and cleanrooms