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Building Temperature and Humidity monitoring

Professional SNMP thermometer for remote environment monitoring - STE2 PLUS

We provide reliable monitoring solution suitable for various environments where temperature and humidity monitoring is critical. Whether it’s a server room, warehouse, or healthcare facility, this device ensures reliable and accurate measurements to maintain optimal conditions.

Applications and Usage:

  • Remote Technical Rooms Monitoring: Monitor server rooms, data centers, or other technical spaces remotely.

  • Drug Storage: Ensure proper storage conditions and create HACCP logs using application software.

  • Food Storage: Control storage conditions and comply with food safety standards.

  • Building Environment Monitoring: Monitor temperature and humidity in buildings.

  • Refrigerator or Freezer Monitoring: Receive alerts if a refrigerator or freezer fails, and log operating conditions.

  • Water Flooding Detection: Detect water leaks or flooding.

  • Heating Optimization: Optimize heating and air conditioning costs by monitoring temperature

Unique features

  • SNMP v3 is secured version of SNMP protocol. Together with SNMP Traps feature upgrading STE2 PLUS to professional SNMP environment monitoring device.

  • 8x VDO (Virtual Digital Output) gives the STE2 PLUS the ability to control relay outputs on other LAN devices

  • The Alarm Reminder repeats information about the duration of the alarm condition as long as the condition persists.

  • IPv6 support is important for some telco operators and bigger customers.

Monitoring devices STE2 Plus

TE2 PLUS is a professional LAN & WiFi remote sensors monitoring product. You can connect external sensors (up to 15 values) to 2x RJ11 ports. External detectors can be connected to 2x DI (Digital Input). The STE2 PLUS is a professional product with HTTPS custom certificates, SNMPv3, SNMP Traps and IPv6.

The STE2 PLUS package includes a power adaptor and 3m outdoor temperature sensor for remote temperature measurement. The device can be connected to the network via WIFI or LAN (RJ45) with PoE power support.

Sensor values are displayed via the device's web interface, in API (SNMP or XML) on the Portal or on the mobile/tablet screen (HWg Monitor).

Not designed only for temperature and humidity monitoring. What other values you can monitoring ?


        100A DC Current probe 1W-UNI  


        Sensor THPVoc 1W-UNI  - Sensor THPVoc 1W-UNI measures temperature  (-30 to + 70°C), and air humidity (0-100 %RH - Relative Humidity) as well as atmospheric pressure  (30 000 to 110 000 Pa) and air-quality  ( 0 to 60 000 ppb) concentration of volatile organic compounds - TVOC. 


        Sensor CO2 1W-UNI  - Sensor CO2 1W-UNI is a combined Temperature (-0 to +50 °C), Relative Humidity (RH 0-95%) and CO2  (300 - 40000 ppm) sensor in one box for the indoor environment.


30A AC Current probe 1W-UNI 2  

Others :

  •           Temp-1W-UNI Pt100 Cable  

  •           Sensor 230V AC 1W-UNI  

  •           Sensor 4-20mA 1W-UNI  

  •           Light 1Wire-UNI  

  •           Sensor 60V 1W-UNI v2  

  •           Sensor 0-20mA 1W-UNI  

Isolated DC current sensor for the 1Wire-UNI bus. Sensor for measuring currents in the 0–20mA range. It is typically used to connect an industrial probe with 0 / 4 to 20mA output - with a discrete power supply (e.g. to measure the fuel level in a tank).

Alarming and displaying of sensor values

When the measured temperature (Relative Humidity, Voltage, ..) on the external sensor(s) exceeds the defined Min-Max range (Safe Range), the STE2 device sends an email alert.

Email alerts from the device

  • Use 3rd party SMTP server and send email alerts from the STE2 device directly.

  • For long-term alerting stability be careful about using "public webmail" SMTP server like and others. We do not recommend using these services, they are changing their security requirements in time and customers can simply lose alarm from the device.

  • We recommend using the Portal ( for free) & send email alerts from the Portal. It's long-term and more reliable.

Alerting via external SMS Gateway

  • One SMS GW can be used for forwarding alerts from several devices on the same LAN.

  • An alert can be sent as SMS or Voice call to a defined phone number.

  • No portal or software is required.

Sensor values display in your pocket (on the wall): HWg Monitor

  • The HWg Monitor is a Mobile App (Android or iOS) for displaying of sensor values

  • Data input: LAN devices (All HWg products) / Portal user account

  • All sensor values are on one screen.

  • Showing preferred sensors on the widget.

Free Portal service:

  • The is a free service from HW group for up to 20 devices in one user account.

  • Alerting: An email alert can be sent from the portal (higher long-term reliability compared to public SMTP server)

  • Alerting: Device Invalid (disconnected) alert from the portal is available

  • Simple alarm escalation is available (emails only)

  • Sensor value graphs are available

  • Switching remote relay output based on sensor values.

  • Central alerts overview & management.

Paid Portal service (Portal providers)

  • SensDesk Technology portal (SaaS or On-premise)

  • Email, SMS, Voice call alerts

  • Multi graphs with several years of history

  • User account API: SNMP or XML

  • Reports (PDF)

  • Multi-users accounts

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