What LINK does

LINK GmbH is a privately held, owner-managed German manufacturer of certified security technology components and building automation products, headquartered in Butzbach near Frankfurt am Main. Founded in 1967, the company designs, develops and produces its entire product range — magnetic contacts, bolt contacts, glassbreak detectors, non-contacting transmitters, panic buttons, water detectors, alarm glass cable links (LGC), door loops, terminal boxes and wiring accessories — under one roof in Germany, with proprietary inductive signal transmission technology and certifications including VdS Class B/C, EN 50131-2-6 Grade 3, and DIN EN ISO 9001:2015. Its solutions detect unauthorized opening, glass breakage, panic events and water intrusion in security and alarm systems, and are deployed in landmark sites such as the Berlin Reichstag, the rebuilt Berlin Palace, the European Central Bank in Frankfurt, embassies, banks, museums and industrial buildings.

The company operates a three-tier go-to-market under the sub-brands LINK PRO (standard assortment for specialist installers via trade channels), LINK OEM (custom-branded components for OEM partners, including private-label cables, packaging and documentation) and LINK ODM (full-service custom development of exclusive products for technology firms). Revenue is generated exclusively through B2B hardware sales of these certified components to specialist companies, installers, industrial further processors and OEM partners across Germany, Austria, Switzerland and Italy, with representation in Italy via a dedicated country representative. LINK currently employs approximately 140 people (one source cites ~120), is led by Managing Directors Daniel Link, Markus Link and Jürgen Witzendorff under second-generation family ownership, and maintains active participation in DKE and European standardization committees for alarm and security technology.

Name

LINK

Legal name

LINK GmbH

Website

https://link-gmbh.com

Company type

Private

Founded year

1967

Operating status

Operating

Headcount range

51–100 employees

Short description

LINK GmbH is a family-owned German manufacturer of certified magnetic contacts, intrusion sensors, and wiring accessories for security and building automation, supplying specialist installers, OEM partners and ODM customers across the DACH region and Italy.

Ownership category

akta.pro rank

Product category

Security Sensors and Building Automation Components

NAICS

Electronic Connector Manufacturing (334417), Current-Carrying Wiring Device Manufacturing (335931), Other Communication and Energy Wire Manufacturing (335929)

SIC

Industrial Instruments For Measurement, Display, And Control (3823), Electronic Components & Accessories (3670)

akta.pro primary industry

Physical Security IoT & Smart Building Security Integration (Sensors, BMS tie-ins) (BPAKAGAL)

akta.pro secondary industries

Sensor & Peripheral Installation/Replacement (Door/Window, Motion, Glass Break) (HSAHABAD), Architectural Hardware & Door Controls (Hinges, Locks, Closers, Panic Devices) (IMADAIAI)

Keywords

• Magnetic contact manufacturing
• Security sensor components
• Building automation hardware
• Alarm system accessories
• Intrusion detection devices

Headquarters

HQ city

Butzbach

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Supply Chain, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. B2B Product Sales: Direct B2B sales of security technology components to specialist companies, installers, and industrial further processors. Products sold through standard catalog (LINK PRO), custom branding programs (LINK OEM), and exclusive custom development (LINK ODM).

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels4 records

Core offering

LINK GmbH manufactures and supplies security technology components for intrusion detection and building automation, including magnetic contacts, bolt contacts, glassbreak detectors, non-contacting transmitters, panic buttons, water detectors, energy and signal transmission systems (alarm glass cable links and door loops), and terminal boxes with wiring accessories. The company sells exclusively B2B through three units: LINK PRO (standard catalog), LINK OEM (customized branding), and LINK ODM (exclusive custom design and manufacturing).

Product overview

LINK GmbH is a specialist provider of security technology components and building automation solutions based in Germany. The product portfolio centers on four core areas: (1) Sensors including magnetic contacts, bolt contacts, glassbreak detectors, non-contacting transmitters, panic buttons, and water detectors; (2) Energy- and Signaltransmission (EST) encompassing alarm glass cable links (LGC) and door loops/cable transitions; (3) Terminal boxes and wiring accessories including surface-mount and recess-mount distribution boxes with various connection technologies (soldering, LSA, screw, cage clamp), relay boxes, and ready-to-install cables; and (4) Plastics technology for injection-molded components. Products are offered through three business models: LINK PRO (standard assortment for professionals), LINK OEM (customizable branded products), and LINK ODM (custom design and manufacturing). All products are developed and manufactured in Germany with VdS, EN, and ISO 9001 certifications.

Differentiator

Problem solved

Functional benefit

Products and services

• Magnetic Contacts Security sensors installed in alarm systems to detect unauthorized entry through windows, doors, or gates. Also capable of detecting shutter lifting or object movement. Available in recessed mount, surface mount, and integrated fitting variants. Designed for specialist installers, OEM partners, and ODM customers.
• Bolt Contacts Door strike plate contacts installed in the door frame catch area. When the bolt extends, it pushes the contact arm lever to signal the locking status of the door to the security system.
• Glassbreak Detectors Sensors detecting glass breakage in windows and doors. Certified EN Grade 2 / VdS Class B for reliable glass break detection in security installations.
• Non-contacting Transmitters Contactless signal transmission devices enabling energy and signal transfer without physical contact. Certified VdS Class B and C for high security applications.
• Panic Buttons Manually activated alarm devices for discreet panic alarm triggering. Pressing the plate sends an alarm signal to the intruder alarm control panel. Certified VdS Class C.
• Water Detectors Sensors detecting water presence for early water leak detection and prevention of water damage.
• Alarm Glass Cable Links / LGC Flexible alarm glass cable assemblies for connecting alarm glass panes to the alarm system. Feature single-core round cable with socket elements in various lengths.
• Door Loops / Cable Transitions Energy and signal transmission devices for windows and doors. Available in detachable, recess-mount, surface-mount, vandal-proof, and miniature variants for various installation requirements.
• Terminal Boxes Wiring distribution boxes for building automation and security installations. Available in surface-mount (aP) and recess-mount (uP) variants with multiple connection technologies including soldering, LSA/insulation displacement, screw, cage clamp, and relay configurations.
• Cables Ready-to-install cable lengths available in white and brown colors with LSA-compatible conductors having 2 to 6 cores.
• LINK PRO Standard Assortment Standard product assortment of quality products for specialist companies and installers. Deep product range covering every installation situation, targeting qualified professionals, specialist businesses, and industrial downstream processors.
• LINK OEM Custom Branding Program Customizable product range for custom brand name labeling. Products individually configured with custom cable lengths, color codes, mounting materials, individual packaging, labeling, technical documentation, and compliance with national/international standards.
• LINK ODM Custom Design Manufacturing Original Design Manufacturing - customer-specific consulting, planning and development of exclusive products. Offers technological leadership, certified quality, reliable delivery capability, and comprehensive support for series production.
• FMK 4 G2 Magnetic Contact Compact and flat surface-mount magnetic contact for opening and combined locking and opening monitoring, easily and concealed mounted on windows and doors. VdS tested and approved.
• 100 01 51 A/A G3 Magnetic Contact Surface-mount magnetic contact certified to VdS Class C and EN 50131-2-6 Grade 3, protecting windows, doors, vending machines, or safes against manipulation. Flexibly mountable opening detector for highest security requirements.

Quantifiable outcome

• Products installed in landmark buildings including Berlin Reichstag, rebuilt Berlin Palace, and European Central Bank Frankfurt demonstrating market-leading quality standards

Named customers8 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature8 records

Partnerships

Four partnerships are on record, tiered regional and industry.

• Oreste Dalla PalmaregionalChannel Partner/ Reseller/ DistributorMr. Dott. Ing. Oreste Dalla Palma serves as the dedicated representative for the Italian market, providing direct local contact and support for Italian customers.
• OEM Distribution PartnersregionalChannel Partner/ Reseller/ DistributorProducts marked 'For OEM distribution' are available exclusively through LINK's OEM sales partners rather than direct from LINK. Partners receive branded/customized products for distribution under their own arrangements.
• BHE (Bundesverband Sicherheitstechnik)industryOthersLINK is a member of BHE (Bundesverband Sicherheitstechnik), the German security technology industry association, demonstrating commitment to industry standards and professional development.
• DKE (Deutsche Kommission Elektrotechnik)industryOthersLINK participates in DKE (German Commission for Electrical, Electronic and Information Technologies) and European standardization committees for alarm and security technology, contributing to the development of quality standards.

Scale indicators3 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Texecom Ltd: UK-based designer and manufacturer of intrusion detection sensors and alarm signalling equipment, with overlapping magnetic-contact and glass-break product categories competing in the European professional installer market.
• ABUS Security-Center GmbH: German security products manufacturer offering alarm components including magnetic contacts, glass-break detectors and motion sensors, overlapping directly with LINK's PRO standard assortment for installers in DACH.
• Vanderbilt/ACRE (Comnet): Provider of access control and intrusion detection products including magnetic contacts and supporting perimeter/door hardware, comparable as an OEM-grade supplier serving European security installers.
• Telenot Electronic GmbH: German manufacturer of intrusion alarm systems, motion and magnetic-contact sensors and alarm components, directly comparable to LINK's certified sensor portfolio and DACH installer channel focus.
• Indexa GmbH: German security products vendor offering alarm systems and accessories including magnetic contacts for the professional installer trade, directly comparable to LINK's PRO sales channel and product set.
• Pyronix (Hikvision): Manufacturer of PIR detectors, dual-tech sensors, magnetic contacts and alarm accessories; part of Hikvision, it competes in the same certified-security-sensor category as LINK across European and global channels.

Broad incumbents

• ASSA ABLOY: Global leader in door opening solutions including electromagnetic locks, monitoring sensors and access-control hardware, adjacent rather than head-to-head with LINK but pulling OEM demand for security-building integration components.
• Bosch Sicherheitssysteme: Global incumbent providing intrusion detection, access control and building security with a broad portfolio that includes magnetic contacts and detectors comparable in spec but larger-scope than LINK's focused range.
• Siemens Smart Infrastructure: Large incumbent offering building automation and security components including intrusion sensors and life-safety devices bundled into a much broader portfolio than LINK's specialist catalogue.
• Honeywell Security (Resideo): Large incumbent security provider offering magnetic contacts, glass-break sensors and full intrusion panels. Overlaps LINK at the component level but competes mainly through integrated systems rather than specialized Grade-3 sensors.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/link-gmbh

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about LINK