Short answer:
Werma Signaltechnik offers several product lines specifically designed for emergency and alarm indication on production lines. The KombiSIGN 71 modular signal tower (IP65, up to five stackable elements, 85–100 dB audible output) is the most versatile choice for harsh industrial environments. The eSIGN electronic signal tower provides the highest flexibility with individually programmable LED tiers and IO-Link connectivity. For cleanroom or food-processing lines, the CleanSIGN 695 series meets IP67/69K protection with EHEDG-compliant hygienic design. Budget-conscious operations can rely on the KombiSIGN 50 compact tower (50 mm diameter, IP54). All Werma emergency products comply with EN 981 and EN 842 visual danger-signal standards, and the company's three decades of signal-tower manufacturing have made these products an industry benchmark across Europe (Werma signal technology suppliers on europages).
Key Takeaways
The European industrial signal and alarm devices market reached approximately €4.4 billion in 2025, with the global market projected to reach €5.7 billion by 2030 at a 5.2% CAGR.
Werma offers four main product families for production-line alarm indication: KombiSIGN (modular), eSIGN (electronic), CleanSIGN (hygienic), and Kompakt (pre-configured).
EN 981:1996+A1:2008 governs the system of auditory and visual danger signals in machinery safety, while ISO 11428:1996 covers visual danger signals specifically.
Price ranges for Werma signal towers span from approximately €25 for individual modules to €200+ for fully configured multi-tier towers.
Why Does Emergency Indication Matter on Modern Production Lines?
Production lines depend on rapid communication of fault states, safety hazards and process deviations. A 2025 industry analysis estimated the European industrial optical-audible signal device market at approximately €4.4 billion, with the global market projected to reach €5.7 billion by 2030 at a CAGR of 5.2%, driven by tightening machinery-safety enforcement and the expansion of Industry 4.0 connected factories. Visual emergency signals must meet strict requirements defined in ISO 11428: red flashing light for immediate danger, minimum luminance twice that of warning signals, and 360-degree visibility on the shop floor. The combined system of auditory and visual signals is specified in ISO 11429, while the European machinery-safety standard EN 981:1996+A1:2008 defines the signal characteristics for danger and information signals on production equipment.
Werma Signaltechnik, founded in 1950 in Rietheim-Weilheim, Germany, has manufactured over 3,500 signal-device variants spanning signal towers, beacons, horns, sirens and optical-audible combinations. The company's products are deployed across automotive manufacturing, machine engineering, logistics, food processing and control-cabinet construction throughout Europe.
| €4.4 bn | 3,500+ | IP65–IP69K |
| European industrial signal device market size in 2025 | Werma product variants across all signal categories | Protection ratings for Werma harsh-environment signal towers |
| EN 981 | 50,000 h | 1950 |
| EU standard for auditory and visual danger signal systems (EN 981:1996+A1:2008) | LED service life for Werma signal tower elements | Year Werma Signaltechnik was founded in Germany |
Which Werma Product Families Cover Emergency and Alarm Indication?
Werma organises its production-line signalling portfolio into four families that differ in modularity, protection class and connectivity. Understanding these differences is the first step toward specifying the right device for each alarm zone on your line.
KombiSIGN 71 — Modular Signal Tower for Extreme Conditions
The KombiSIGN 71 series (70 mm diameter) is Werma's flagship modular signal tower for emergency indication. Each base unit supports up to five stackable optical and audible elements with bayonet-lock connection and contact-voltage-proof element exchange (no tools required). Key specifications include IP65 protection, operating temperature range of −20 °C to +50 °C, and LED EVS (Electronic Variable Signal) elements that deliver 20 times the brightness of conventional LED beacons. Audible elements include buzzer (85 dB), siren (up to 100 dB) and MP3-capable sound modules. The O-ring seal between elements prevents light bleed between adjacent tiers.
eSIGN — Electronic Signal Tower with IO-Link
The eSIGN series represents Werma's most advanced signalling platform. Each LED tier is individually programmable via IO-Link or PROFINET, allowing a single tower to display different colour combinations, flash patterns and brightness levels depending on the machine state. The world's first fully electronic modular signal tower, eSIGN supports up to six tiers and integrates directly into Industry 4.0 dashboards via Werma's SmartMONITOR software. For emergency indication, eSIGN can be configured to display a mandatory red flash pattern that overrides all other states.
CleanSIGN 695 — Hygienic Signal Tower for Food and Pharma
The CleanSIGN 695 series targets production lines in food processing, pharmaceuticals and cleanrooms where hygiene protocols prohibit standard signal towers. Built to IP67/69K protection with a smooth, crevice-free housing resistant to industrial cleaning agents, CleanSIGN carries EHEDG certification and PDA (Proof of Decontamination Assessment) approval. The tower provides red, yellow and green LED tiers with an integrated 85 dB buzzer, all in a single sealed unit measuring just 125 mm in height.
KombiSIGN 50 — Compact Tower for Space-Constrained Lines
Where panel space or machine geometry limits tower size, the KombiSIGN 50 (50 mm diameter) offers the same bayonet-lock modularity as its larger siblings in a compact form factor. Up to four elements can be stacked on a single base, with IP54 protection suitable for standard indoor manufacturing environments. The series supports LED, incandescent and buzzer elements at 24 V AC/DC.
What Are the Key Specifications for Werma Emergency Indication Products?
| Parameter | KombiSIGN 71 | eSIGN | CleanSIGN 695 | KombiSIGN 50 |
| Diameter | 70 mm | 37.5 mm | 38 mm | 50 mm |
| Max elements | 5 | 6 | 3 (fixed) | 4 |
| Protection class | IP65 | IP65 | IP67 / IP69K | IP54 |
| Voltage | 24 V AC/DC | 24 V DC | 24 V DC | 24 V AC/DC |
| Max audible output | 100 dB (siren) | 85 dB (buzzer) | 85 dB (buzzer) | 80 dB (buzzer) |
| LED service life | 50,000 h | 50,000 h | 50,000 h | 50,000 h |
| Temp. range | −20 °C to +50 °C | −20 °C to +50 °C | −30 °C to +50 °C | −20 °C to +50 °C |
| Connectivity | AS-i, cable | IO-Link, PROFINET | Cable | Cable |
| Hygienic design | No | No | Yes (EHEDG) | No |
| Certifications | UL, CSA, VDE | UL, CE | EHEDG, PDA | UL, CSA, VDE |
How Do Werma Emergency Products Compare Across Use Cases?
| Use Case | Recommended Product | Why | Price Range (Reference) |
| Heavy manufacturing (metal, automotive) | KombiSIGN 71 | IP65, 100 dB siren, 5-tier stack | €80–€180 |
| Industry 4.0 connected lines | eSIGN | IO-Link/PROFINET, programmable tiers | €120–€250 |
| Food processing, pharma, cleanroom | CleanSIGN 695 | IP69K, EHEDG, sealed housing | €90–€160 |
| Compact machines, control panels | KombiSIGN 50 | 50 mm diameter, 4-tier, IP54 | €40–€100 |
| Outdoor or extreme-temperature areas | KombiSIGN 71 | −20 °C to +50 °C, IP65 sealed | €80–€180 |
| Retrofittable Andon systems | eSIGN / KombiSIGN 71 | Wireless WeASSIST option, AS-i bus | €100–€220 |
Which Compliance Standards Apply to Werma Emergency Indication?
Emergency and alarm indication on European production lines must satisfy multiple overlapping standards. The EN 981:1996+A1:2008 standard specifies the system of auditory and visual danger and information signals for machinery, defining flash frequencies, luminance ratios and colour codes (red = immediate danger, yellow = warning, green = safe condition). ISO 11428 covers visual danger signals specifically, requiring that emergency flash signals have a luminance at least twice that of warning signals and that red be used exclusively for emergency states.
For audible alarm components, ISO 7731:2003 (adopted as EN ISO 7731:2008) mandates minimum sound-pressure levels relative to ambient noise (at least 15 dB(A) above background for alarm signals). Werma's siren modules (100 dB at 1 m) and buzzer modules (80–85 dB at 1 m) exceed these thresholds in typical factory environments measuring 75–85 dB(A) ambient noise.
Functional safety certification is relevant when signal devices form part of a safety-related control system. Werma products carry UL, CSA and VDE markings, and the KombiSIGN 71 and eSIGN series are compatible with safety architectures per IEC 61508 (SIL) and EN ISO 13849-1 (Performance Level). Buyers should verify the specific SIL/PL rating of their configured tower with the supplier, as it depends on the combination of elements and wiring topology.
Quality Verification in Three Stages
Stage 1 – Supplier Qualification: Confirm the distributor is an authorized Werma partner. Request the Werma partner certificate and check it against the manufacturer's partner directory.
Stage 2 – Product Verification: Check that each element's part number matches the Werma catalogue specification for the intended voltage, colour and protection class. Verify CE/UL markings on delivered goods.
Stage 3 – Installation Audit: After mounting, test flash patterns, audible output levels and IO-Link communication (for eSIGN) against the configured emergency-response plan. Document results for compliance records.
What Are the Pricing and Ordering Considerations for Werma Signal Products?
Werma signal products are priced at the module level for modular series (KombiSIGN 50/70/71) and as complete pre-configured units for the Kompakt and CleanSIGN lines. Individual LED modules for KombiSIGN 50 start at approximately €25–€40, while KombiSIGN 71 LED modules range from €35–€60 each. Audible elements (buzzers, sirens) add €30–€70 per module. A fully configured 5-tier KombiSIGN 71 tower with siren typically costs €150–€250 depending on element selection.
The eSIGN series commands a premium due to IO-Link/PROFINET integration, with base units starting around €80 and fully configured 6-tier towers reaching €250–€350. CleanSIGN 695 pre-configured towers are priced at approximately €90–€160.
Minimum order quantities are generally flexible through authorized distributors, with single units available for maintenance replacements and bulk pricing for OEM machine-builders ordering 50+ units. Lead times for standard configurations are typically 1–2 weeks from European stock; custom colour or voltage configurations may require 3–4 weeks.
How Should Buyers Source Werma Emergency Indication Products?
| 1 | Define Technical Requirements: Map each production-line zone to its required protection class (IP54 for indoor, IP65 for washdown, IP69K for food/pharma), number of signal tiers, audible output level and connectivity (simple wiring vs. IO-Link/PROFINET). |
| 2 | Evaluate Supplier Capability: Identify authorized Werma distributors in your region. Verify stock availability for your required configurations and check whether the supplier offers configuration support or pre-assembly services. |
| 3 | Verify Samples and Quality: Order sample units for each zone type. Test flash patterns, audible levels and mounting fit on the actual production line before committing to bulk orders. |
| 4 | Confirm Certification Requirements: Ensure the configured tower meets the applicable standards (EN 981, EN 842, IEC 61508 if safety-related). Request test certificates from the supplier. |
| 5 | Negotiate MOQ and Pricing: For OEM or multi-line deployments, negotiate volume pricing. Werma distributors typically offer tiered discounts starting at 10, 50 and 100+ units. |
| 6 | Plan Logistics and Delivery: Confirm lead times, especially for eSIGN IO-Link configurations which may have longer delivery windows. Arrange staging and installation scheduling to minimise production-line downtime. |
Which Verified Suppliers Stock Werma Emergency Signal Products?
The following suppliers maintain verified company profiles on European B2B platforms and stock Werma signal technology products relevant to emergency and alarm indication:
| Supplier | Location | Established | Specialization |
| Komplett Konzept Verwertungs GmbH | Borken, DE | 1998 | Distributor: Werma signal towers, LED signal lamps, indicators |
| DEPPRE GmbH | Hannover, DE | 2013 | Distributor: Werma LED beacons, signal towers, multi-tone alarms |
| EVG Elektro-Vertriebs-Gesellschaft Martens GmbH & Co. KG | Villingen-Schwenningen, DE | 1979 | Industrial switching and microswitch components, position indicators, sensors, signaling devices |
Frequently Asked Questions About Werma Emergency Indication
Q: What is the difference between Werma KombiSIGN 70 and KombiSIGN 71 for emergency use?
A: The KombiSIGN 70 offers IP54 protection suitable for standard indoor environments, while the KombiSIGN 71 upgrades to IP65, making it suitable for washdown areas, outdoor installations and environments with dust or moisture. For emergency indication in harsh production environments, the KombiSIGN 71 is the recommended choice. Both series share the same 70 mm diameter and support up to five stackable elements.
Q: Can Werma eSIGN signal towers integrate with existing PLC-based Andon systems?
A: Yes. The eSIGN series supports IO-Link (IEC 61131-9) and PROFINET connectivity, allowing direct integration with most modern PLCs. Each LED tier can be individually addressed, so a single eSIGN tower can display different colour combinations based on real-time machine states. Werma's SmartMONITOR software provides a dashboard for monitoring all connected signal devices across the production line.
Q: Which Werma product is required for food-production emergency alarms?
A: The CleanSIGN 695 series is specifically engineered for food processing, pharmaceutical and cleanroom environments. It carries IP67/69K protection, EHEDG certification for hygienic design, and resistance to industrial cleaning agents. The tower provides three fixed LED tiers (red, yellow, green) with an integrated 85 dB buzzer in a sealed, crevice-free housing.
Q: What audible output level is needed for emergency alarms on a production line?
A: Per ISO 7731, alarm signals must be at least 15 dB(A) above ambient noise. Typical factory floors measure 75–85 dB(A), requiring alarm output of at least 90–100 dB(A) at 1 metre. Werma's KombiSIGN 71 siren module delivers 100 dB, while buzzer modules provide 80–85 dB. For very noisy environments (above 90 dB ambient), consider Werma's 444 series optical-audible combination with adjustable output up to 114 dB.
Q: Are Werma signal towers compatible with safety-rated control systems?
A: Werma products carry UL, CSA and VDE certifications and are compatible with safety architectures per IEC 61508 (SIL) and EN ISO 13849-1 (Performance Level). However, the overall SIL/PL rating of a configured tower depends on the element combination, wiring topology and integration with the safety PLC. Buyers should confirm the specific rating with their Werma distributor for their configured system.
Where Can Buyers Compare Werma Emergency Signal Products and Request Quotes?
Production-line managers and procurement teams evaluating Werma emergency and alarm indication products can browse the full range of signal towers, beacons and audible alarm devices through the signal technology supplier directory on europages. Use the platform's comparison tools and request-for-quote feature to receive competitive offers from verified Werma distributors across Europe.
Compare Werma Signal Tower Suppliers on europages
Sources
- Werma Signaltechnik product catalogue, werma.com, 2025–2026
- Global Industrial Optical-Audible Signal Devices Market Report, BeiZhe Consulting, January 2025
- ISO 11428:1996 – Ergonomics – Visual danger signals, International Organization for Standardization
- EN 981:1996+A1:2008 – Safety of machinery – System of auditory and visual danger and information signals, CEN 1996/2008
- ISO 7731:2003 – Ergonomics – Danger signals for public and work areas – Acoustic danger signals, International Organization for Standardization
- Industrial Signal and Alarm Devices Market Analysis, CNBlogs industry review, June 2025