SHERIDAN, WYOMING – October 21, 2025 – DIATRON, a brand within the Diamond Control Systems portfolio, has unveiled the OSU-400 safety module — a breakthrough in sauna safety technology designed to prevent fire hazards caused by misplaced objects on sauna heaters. The innovation marks a new benchmark for automated fire prevention in both private and commercial sauna environments.
Next-Generation Optical Scanning for Safer Sauna Operations
The OSU-400 introduces a fully optical safety approach, scanning the heater surface across 100 measurement points to build a precise, topographical map of safe operating conditions. When a towel, bucket, or any foreign object disturbs this learned surface profile, the system automatically shuts off the heater’s electrical power, preventing ignition and overheating.
This approach replaces outdated mechanical or spot-light sensors by delivering comprehensive, real-time monitoring. As a result, it responds effectively even to light objects, such as cloths or paper, which conventional systems often miss.
Enhanced Reliability Through Multi-Point Detection
Unlike point-based detection systems that cover only limited zones, DIATRON’s OSU-400 captures a full 3D surface profile. This multidimensional coverage allows for continuous learning and adjustment, ensuring accurate performance across varying sauna configurations.
Key performance benefits include:
- 100-point optical mapping for high-resolution surface detection
- Automatic power cut-off in case of obstruction or foreign object detection
- Manual or automatic reactivation once safety conditions are restored
- Integrated LED status indicator for easy, intuitive operation
These features not only enhance fire prevention but also simplify usability for staff in spas, gyms, hotels, and wellness facilities.
Compliant and Future-Ready for Remote Sauna Control
The OSU-400 far exceeds the safety standards defined in DIN EN 60335-2-53, making it suitable as a mandatory safeguard for remotely operated sauna systems. This ensures compliance with modern automation requirements and significantly lowers the operational risk of unattended heating systems.
The device can also be retrofitted to existing heaters from any manufacturer, offering a cost-effective upgrade path for facility operators seeking to align with stricter fire safety regulations.
User-Centric Design for Immediate Status Awareness
Ease of use was a core design priority. The OSU-400’s built-in traffic light indicator provides clear visual feedback:
- Green for normal operation
- Red when the module detects an anomaly and power is interrupted
This simple yet effective alert system allows even untrained personnel to respond quickly and safely.
Industry Outlook: Safety and Automation Converge in Wellness Facilities
The OSU-400 reflects a wider industry shift toward intelligent, sensor-driven safety systems in leisure and wellness facilities. As the global sauna and spa market increasingly embraces remote monitoring and smart control solutions, integrating optical sensing technology positions DIATRON as a leader in preventive safety innovation.
Facility managers and wellness operators can now combine automation efficiency with enhanced safety — a key competitive advantage in a growing global market for connected wellness technology.
Learn more at www.diamond-cs.com or visit DIAMOND Control Systems at aquanale 2025, Hall 8.1, Booth D21 (October 28–31, 2025).