Custom relay and switching support for critical industrial applications
Dold Industries Limited supports buyers and specifiers with custom relays, measurement relays, safety switching, and industrial monitoring products for rail, power, water, and infrastructure-led environments.
90+ years of relay manufacturing and industrial switching expertise
Dold Industries Limited combines long-established Black Forest engineering with ISO 9001 controlled manufacture and practical UK support. The business supplies relay and switching products for demanding sectors including power generation, water, transport, and other safety-critical industrial applications.
Specialist switching and relay support for industrial applications
Custom Relay Solutions
Tailored relay products built around the electrical, operational, and compliance requirements of each project.
Precision Manufacturing
State-of-the-art manufacturing methods focused on consistency, repeatability, and dependable performance.
Consultative Support
Experienced technical guidance to help specify the right solution for switching, control, and monitoring duties.
Quality Assurance
Rigorous testing and control processes to ensure products meet the standards expected in critical applications.
Built for dependable supply, technical clarity, and real-world applications
ISO 9001 Controlled Production
Documented manufacturing and testing processes help reduce risk for buyers needing dependable, repeatable supply.
- Documented production controls
- Repeatable test procedures
- Buyer risk reduction
Critical Sector Experience
Relay and switching products are used in applications linked to rail, power, water, and wider infrastructure requirements.
- Rail and transport duties
- Power and water applications
- Infrastructure-focused supply
UK Technical Response
Specifiers and procurement teams have a direct UK route for technical questions, pricing discussions, and application review.
- Direct UK technical contact
- Pricing and application review
- Specifier support
Custom and Repeat Supply
Support is available for project-specific relay builds as well as continuity of supply for repeat industrial demand.
- Project-specific relay builds
- Repeat industrial demand
- Continuity of supply
Need help selecting a relay or specifying a custom build?
Speak with the Dold Industries team about your application, approval requirements, and delivery needs before moving to the wider DOLD product range.