HW-group STE2 R2

Whether in data centers, server rooms, or building technology – water ingress and undetected leaks are among the greatest threats to infrastructure. Flooding, condensation, or dripping AC leaks can quickly cause IT outages or severe damage. The HWg-STE2 R2 is a powerful IoT monitoring system designed for reliable water leakage monitoring and continuous supervision of temperature, humidity, and other environmental parameters. It provides a versatile solution for protection against water ingress and other critical risks.

The compact device connects to the network via LAN or Wi-Fi and sends alarms instantly by e-mail. Through external gateways such as SMS-GW3 or monitoring portals like HWg-cloud.com or SensDesk Technology, SMS and voice alarms are also possible. This ensures that critical changes are detected in real time, allowing damages to be prevented at an early stage.

By connecting up to five external sensors via two RJ11 ports, the STE2 R2 is suitable for flexible applications. In addition to temperature sensors, humidity, light, power, voltage sensors, and water leak detectors can be integrated. This makes the device not only an early warning system against overheating but also a comprehensive protection tool against water and utility damage.

The intuitive setup via the integrated webserver, HTTPS support, and open interfaces (SNMP, XML) allow seamless integration into existing IT and building management systems. With the HWg Monitor mobile app, users always have access to measurements and alarm statuses – even on the go.

Technical Features

• LAN and Wi-Fi connectivity (RJ45, PoE support)
• Two RJ11 interfaces (daisy-chain, up to five sensor values simultaneously)
• Supports temperature, humidity, CO2, VOC, light, power, and voltage sensors
• Two DI inputs for dry contacts (e.g., door contacts, water detectors)
• Direct e-mail alerting from the device
• Optional SMS and voice call alerts via external gateway or portal
• Open API: SNMP, XML – integration into IT and facility management systems
• HWg Monitor mobile app (iOS/Android) for monitoring on the go
• Package includes: STE2 R2 device, external temperature sensor (3 m, IP67), universal power adapter

Protection Against Water Leakage and Ingress

The STE2 R2 is specially designed for leak and moisture detection. Integrate water leak detectors or area-based WLD cables to reliably detect water under raised floors, in pipes, or near air conditioners. Even small amounts of conductive liquids immediately trigger alarms, reported via e-mail, SMS, or voice call. Thanks to reusable sensor cables, the monitoring solution is both cost-effective and sustainable.

Typical Applications

• Data centers & server rooms: alerts for condensation or pipe damage.
• Air conditioning & building systems: early detection of leaks in technical rooms.
• Storage & archives: safeguarding sensitive materials against water and humidity damage.
• Healthcare & pharmaceuticals: ensuring strict temperature and humidity conditions, plus water leak monitoring.
• Food & logistics sector: monitoring cold chains and preventing storage humidity issues.

Integration & Portal Services

Integration with the HWg-cloud.com portal allows central management of up to 20 devices for free. Features include graphical analysis, status alerts, and centralized alarm overviews. For advanced requirements, SensDesk Technology provides additional functions: PDF reports, SMS and voice alarms, multi-user accounts, and API integration into third-party systems such as SCADA.

SMS Gateway Alarming

The STE2 R2 can be paired with SMS-GW3 / SMS-GW3 LTE. Such a gateway forwards alarms directly as SMS or voice calls – independently from the portal. This ensures maximum reliability in case water leakages or environmental issues are detected.

HWg Monitor Mobile App

With the free HWg Monitor app, all sensor data can be viewed anytime on smartphones or tablets. Widgets allow defined values to be shown directly on the home screen, ensuring that critical information such as water alarms is immediately visible.

Can the STE2 R2 reliably detect water ingress?

Yes, by integrating water leak detectors or WLD sensor cables, the system reliably detects liquids and immediately triggers an alarm.

How does the STE2 R2 handle alarm notifications?

By default, the device sends e-mail notifications. Through gateways or portals, SMS and voice alarms are also possible.

For which environments is the STE2 R2 suitable?

The device is universally applicable – from data centers to industrial storage to building management. It provides maximum security especially in environments where water damage would have fatal consequences.