Secutron MRI-4021-ISO Multi-Sensor Detector with Isolation

Protect facilities with faster, smarter fire detection using the Secutron MRI-4021-ISO multi-sensor combination detector. Designed for commercial security and life-safety applications, this detector combines photoelectric smoke sensing with selectable heat detection to provide earlier, more accurate warnings while reducing nuisance alarms. Certified to UL 268 7th Edition and CAN/ULC S529 Rev 4, the MRI-4021-ISO meets rigorous safety standards demanded in data centers, healthcare, retail and institutional environments.

The unit communicates via a fully digital SLC loop and can be linked with up to 240 MRI-4000 series devices for centralized monitoring and streamlined integration. Its advanced software algorithms differentiate real fire events from dust or insect interference, cutting false-dispatch incidents and ongoing maintenance. Dual 360° LED indicators and a remote output option improve on-site visibility and remote diagnostics, while handheld addressing (MIX-4090) speeds commissioning.

For reliable smoke and heat monitoring that enhances your security and surveillance strategy, specify the Secutron MRI-4021-ISO in your next fire alarm system design or contact us to discuss application-specific configurations.

• Early, reliable detection with combined photoelectric and heat sensing to reduce risk and protect assets
• Advanced algorithms that minimize nuisance alarms from dust or insects, lowering maintenance and false-dispatch costs
• Dual heat settings (fixed 135°F or 135°F with Rate-of-Rise) to tailor protection for varied commercial environments
• Seamless integration on SLC loops—supports up to 240 MRI-4000 devices for scalable system design and simplified monitoring
• 360° dual-color LED visibility and remote output control for clear status indication and easy remote diagnostics