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DOLD is a global pioneer in industrial safety and electrical control technology. From their legendary safety relays and complex trapped key interlocking systems to intelligent motor controls and precise monitoring devices, DOLD provides premium, German-engineered solutions designed to enhance machine safety, ensure compliance, and maximize factory uptime.
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Uncompromising Safety. Precision Control.
Safeguard your workforce and machinery with industry-leading monitoring relays and trapped key interlocks built for extreme reliability.
Pioneering Safety Relay Technology
Trust the experts who helped define machine safety. DOLD’s legendary SAFEMASTER line provides highly reliable, space-saving safety relays and modular controllers that easily achieve Performance Level e (PL e) and SIL 3 compliance for any machine guarding application.
Advanced Trapped Key Interlocking
Prevent hazardous access before the machine stops. DOLD’s SAFEMASTER STS is a premier trapped key interlocking system that seamlessly combines mechanical keys with electrical safety switches, offering a highly customizable, tamper-proof solution for complex guarding setups.
Precision Monitoring Relays
Catch system failures before they cause downtime. DOLD offers a massive portfolio of measuring and monitoring relays to constantly track voltage, current, temperature, insulation resistance, and phase sequence, ensuring your critical equipment operates strictly within safe parameters.
Reliable Power Electronics & Motor Control
Optimize your heavy electrical loads. From wear-free solid-state relays and contactors to intelligent soft starters and braking devices, DOLD's power electronics are engineered for high switching frequencies, silent operation, and extended operational lifespans.
Decades of German Engineering Excellence
Rely on uncompromising Black Forest manufacturing quality. With over 90 years of experience, DOLD maintains complete in-house production control—from custom toolmaking to final assembly—guaranteeing robust, premium-grade components that survive the harshest industrial conditions.
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Over 90 years of Black Forest engineering. Thousands of custom configurations. One global standard for safety. Whether you are outfitting a massive perimeter with mechanical interlocks or integrating space-saving safety modules, DOLD's massive portfolio delivers unmatched reliability. Sign up for our newsletter today to receive exclusive updates, catalog additions, and expert machine safety guidance.
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