HW-group STE2 PLUS

Water leaks and unnoticed ingress are among the most serious risks for data centers, server rooms, cooling areas, and storage facilities. A leaking pipe or condensation from an air conditioning unit can be enough to paralyze an entire IT infrastructure. With the STE2 PLUS, HW-group has developed a state-of-the-art monitoring system that provides reliable water leakage detection as well as monitoring of other environmental parameters. This makes the STE2 PLUS an essential tool for companies that need to protect their critical infrastructure against water ingress and environmental damage.

Combining LAN, Wi-Fi, and PoE, the STE2 PLUS offers maximum installation flexibility. Up to 15 sensor values can be connected – including water leak detectors, temperature sensors, humidity sensors, or CO₂ sensors. Integration into IT environments is seamless thanks to SNMP v3 and open APIs (SNMP, XML). IT managers benefit from a secure, professional monitoring system that also meets demanding compliance requirements.

Especially in water ingress protection, the STE2 PLUS shows its strength: using spot or area-based sensors, it detects even the smallest amounts of liquid and immediately triggers an alarm. This prevents leaks from going unnoticed and causing costly damage.

A wide range of alarm options is available: e-mail, SMS (via gateways), voice calls, or notifications through the HWg-Cloud and SensDesk portals. The reminder function ensures notifications are repeated until the alarm condition is resolved, preventing administrators from missing critical events.

Technical Advantages of the STE2 PLUS

• LAN and Wi-Fi connectivity for flexible integration
• SNMP v3 support for IT security and network management
• PoE power supply via Ethernet – easy installation without a power adapter
• Connection of up to 15 sensor values via daisy-chain
• 2 digital inputs (e.g., door or leak detectors)
• HTTPS security with custom certificates
• Virtual digital outputs (VDO) for controlling remote relays
• IPv6 support for modern networks

Protection Against Water Leakage and Ingress

The STE2 PLUS quickly and reliably detects water or other conductive liquids when used with HW-group water leak detectors. Typical scenarios include leaks from air conditioners, water ingress due to building issues, or broken pipes. Early alarms help prevent short circuits, data loss, and business interruptions.

Thanks to reusable sensor cables, the system is not only reliable but also economical. After drying and cleaning, WLD sensor cables can be reused multiple times.

Typical Applications

• Data centers & server rooms: prevent damage from condensation or pipe leaks.
• Pharmaceutical & healthcare: monitoring storage of medicines with temperature, humidity, and leakage control.
• Warehouses & logistics: cold and freezer storage monitoring with added water protection.
• Museums & archives: protection of sensitive exhibits and documents against moisture damage.
• Building management: early warnings of water ingress in basements or facilities.

Portal Integration

The STE2 PLUS can be directly integrated into HWg-Cloud.com (free for up to 20 devices), providing centralized alarm overviews, sensor graphics, and device status alerts. For professional requirements, SensDesk Technology offers advanced features such as SMS and voice alarms, PDF reports, API integration, and multi-user rights.

Mobile Monitoring

The free HWg Monitor app (iOS/Android) offers global access to all sensor data. Critical readings – such as a water alarm – can be displayed as a widget directly on the home screen, ensuring real-time awareness anywhere.

Supported Sensors

• Temperature and humidity sensors (indoor/outdoor, cryogenic, calibrated)
• CO₂ and VOC sensors
• Light sensors
• AC/DC current sensors
• Voltage sensors (0–230 V)
• 4–20 mA converters for industrial probes
• Water leak detectors: spot detectors or WLD sensor cables for area detection
• Airflow sensors, door contacts, motion detectors, gas sensors, vibration sensors

Can the STE2 PLUS reliably detect water ingress?

Yes, in combination with HW-group water leak detectors or WLD sensor cables, the STE2 PLUS detects liquids at an early stage and immediately triggers alarm notifications.

What alarm options are available?

By default, the STE2 PLUS can send e-mail alerts. Through portals or external gateways, SMS and voice alarms are also possible. The reminder function continuously repeats alarms until the issue is resolved.

For which environments is the STE2 PLUS particularly suitable?

It is ideal for data centers, warehouses, building monitoring, and medical facilities where water damage could have especially critical consequences.