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HWg-STE PoE: SNMP-Thermometer

HWg-STE PoE: IP-fähiges Web-Thermometer mit Alarmbenachrichtigung per E-Mail und SNMP-Unterstützung. Messung von Temperatur und Luftfeuchtigkeit mit zwei externen Sonden. Stromversorgung über Ethernet oder Steckdosenadapter.

Note: Shorted version - full details in english version.

Das Web-Thermometer HWG-STE PoE wird über einen integrierten Webserver konfiguriert. Wenn die Temperatur (Luftfeuchtigkeit) einen definierten Schwellenwert überschreitet, wird eine Alarmbenachrichtigung per E-Mail versendet. Die kostenlose Windows-Software HWg-PDMS für Diagramme und Auswertungen mit Microsoft Excel-Export ist im Lieferumfang enthalten.

  • Das IP-Thermometer HWG-STE ist vollständig SNMP-kompatibel
  • PoE-Temperaturüberwachung, Alarmbenachrichtigung per E-Mail bei Überhitzung oder Temperaturabfall
  • Windows-Software, Netzteil und Temperatursensor sind im Lieferumfang enthalten
  • Einfache Installation, unterstützt DHCP und PoE (IEEE 802.3af)


Typische Anwendungen sind u. a. die Überwachung der Temperatur von Geräten, Computern oder Disk-Arrays sowie die Überwachung des Betriebs von Heizungs-, Lüftungs- und Klimaanlagen.

Optional accessories:

  • Humidity probe
  • Temperature and humidity probe for installation in a 19" rack
  • Outdoor waterproof, stainless-steel temperature probe, -50°C to +125°C (-58°F to +257°F)
  • Fridge / Icebox temperature probe, flat cable, -30°C to +60°C (-22°F to +140°F)
SNMP teploměr, poe dohled teploty, teploměr s napájením přes ethernet, PoE čidlo teploty, IEEE 802.3af, teplota, vlhkost

The device   Rear view  Side view

Paper Box  Package contents    

Web interface
  MS Excel report



  • Remote rack monitoring
    Temperature / humidity monitoring inside and outside of a rack (cabinet), SNMP monitoring, PoE (Power over Ethernet - IEEE 802.3af).

  • Air conditioning failure
    Temperature monitoring; rising temperature indicates cooling fault.
    HWg-STE power over ethernet thermometer is easy to install.

  • Heating system monitoring
    Remote monitoring of a heating system, alert by e-mail or SMS (Email-2-SMS) to a danger of freezing.
    Temperature report to MS Excel available.

  • Cooler/freezer monitoring
    Sends an e-mail if the cooler malfunctions. Logs operating and storage conditions. Temperature reports.

  • Heating optimization
    Web PoE thermometer saves heating and air-conditioning costs. Temperature reports for MS Excel.

  • Food storage
    Monitors optimal storage conditions. With application software, HACCP reports can be created.


STE models comparison

HWg-STE plus
LAN Interface
WiFi Interface (internal antenna)
PoE (IEEE 802.3af) support
External sensors (data points) that can be connected
Combined temperature + humidity sensor counts as 2 sensors.
3 (2x RJ11) 2 (2x RJ11) 2 (2x RJ11)
Temperature & Humidity sensors (1-Wire)
Digital Inputs (for Dry Contacts) 2 2
HWg-SMS-GW support
HWg-Push protocol (required for
SNMP protocol (port 161)
SNMP protocol (port 162)
Retail package
Power adaptor, CD, STE device, temperature sensor included
Ordering quantity single units, 30-pack single units, 10-pack 10-pack, 30-pack

Basic features

  • Simple installation: supports DHCP and sensor autodetection
  • SNMP standard: Connects to NMS (SNMP MIB)
  • Precision: Temperature 0.1°C resolution, display in °C or °F (Humidity: 0.1 %RH)
  • Alerts: Sends e-mail if the temperature (humidity) is too high / too low 
  • Security: protected with a password
  • Included in standard package:
    • Wall plug power adapter
    • Temperature probe on 3m cable -10°C to 80°C (+14°F to +176°F)
  • Optional sccessories (second sensor):
    • Humidity sensor (wall / rack / cable version)
    • Indoor temperature sensor range of the supplied probe (wall / rack / cable version)
    • Outdoor temperature sensor, range -50°C to 125°C (-58°F to +257°F)
    • Fridge / Icebox temperature sensor with flat cable
  • ethernet thermometer, ip thermometre avec alertes email, web thermometre, SNMP thermometre, snmp, excel rapports, email alerting, Ethernet temperatureEthernet: RJ45 (100BASE-T)
  • Stromversorgung: PoE (IEEE 802.3af) oder Steckernetzteil (im Lieferumfang enthalten)
  • Web: Integrierter Webserver
  • Sensoren: 1xRJ11 1-Wire (max. 2 Temperatursensoren/Luftfeuchtigkeitssensoren)
  • MT web: Index web page available also in format for mobile telephone browsers
  • M2M-Kommunikationsprotokolle: SNMP, XML
  • Alarmsignale (Wert außerhalb des als sicher definierten Bereichs): E-Mail
  • Power:
    • HWg-STE: Power adapter
    • HWg-STE PoE: PoE (IEEE 802.3af) + power adapter (depending on type)
  • Supported software
    • Configuration: UDP Config  - IP address configuration and detection (with DHCP)
    • HWg-PDMS: Protokollierung von Daten, Auswertungen, Export für Microsoft Excel
    • CapTemp: Visualization on a map, control of outputs, alarm redirection to SMS
    • SNMPcap: Sensor values & devices visualization
  • For programmers: HWg-SDK contains interface descriptions and examples of using M2M protocols in several programming languages
    (JAVA, PHP, Borland C++ Builder 6.0, Microsoft Visual C++ 6.0, Borland Delphi 6.0, Microsoft Visual Basic & Excel VBA, VB.NET, C code for Linux, JavaScript (AJAX) Microsoft Visual C# 2005 (.NET)

Monitoring software


PDMS: Excel reportingHWg-PDMS (Poseidon-Damocles Monitoring System) periodically collects input and sensor values from units connected to a LAN (Poseidon, Damocles, HWg-STE). Collected data are periodically saved as MS Excel reports.

  • Registered version is free of charge for 3 sensors
  • Collects data over a LAN (using http from the device IP address / by e-mail)
  • Data collection runs in the background as a Windows service
  • Graphical overview of the collected data
  • Temperature report for MS Excel (runs periodically in the background - generate XML database)


Compatible 3rd party SNMP software

HWg-STE PoE SNMP , Thermomètre IEEE 802.3af PoE thermomètre, PoE temperature sensor, PoE

  • ActiveXperts NM (Network Monitor)
  • Axence nVision
  • CA Unicenter NSM R11
  • Cacti
  • CBR little:eye
  • GFi NSM (Network Server Monitor)
  • HP OpenView NNM
  • IBM Tivoli
  • Intellipool INM
  • Ipswitch WhatsUp
  • LoriotPro (LUTEUS)
  • ManageEngine OpManager
  • Microsoft MSC Operations Manager 2007 & MSC Essentials 2007
  • Monitor one (M1)
  • Nagios (special plugin)
  • Paessler IPCheck
  • SNMPc 7 - Castle Rock Computing SNMPc 7
  • The Dude (Microtik)
  • Zabbix

>> 3rd party monitoring SNMP software

Frequently Asked Questions

    Ask for the price or details:
     - Web:  http://
    Country: *

    Spam protection. How many is SIX times six?

  • It is possible to power the HWg-STE PoE using a power adaptor?
    Yes, you can use a standard Power over Ethernet switch or the supplied power adaptor.
  • How can I plot the temperature in a graph?
    Use the supplied free HWg-PDMS temperature monitor software. It's fully compatible with HWg-STE web thermometer.
  • Where can I find the MIB file for connecting with my SNMP software?
    The "HWg-STE.mib" file is available at the "System" page. Simply save it and import it into your SNMP software.
  • Which SNMP version is supported.
    HWg-STE is SNMP monitor compatible with SNMP v1 & SNMP v2.
  • Where can I find SNMP Trap settings?
    HWg-STE does not support SNMP Traps (port 162). Only SNMP at port 161 is supported.
    Use any Poseidon or Damocles products, there are SNMP Traps supported.
    If you need SNMP Trap functionality in HWg-STE for any bigger project, contact us.
  • Can I use HWg-STE without a SNTP server?
    Yes, of course. SNTP server is used to synchronize time and to initialize the clock after power up. However, the time shown in STE e-mails will be incorrect.
  • How can I connect a door contact?
    The HWg-STE IP thermometer supports only temperature and humidity probes. To connect a Dry contact, use e.g. Poseidon 3266, or contact a HWg distributor with your requirements.
  • How can I create a protocol (reports) with recorded temperatures?
    Use the supplied HWg-PDMS software. Logged values can be displayed or exported to MS Excel.
    Temperature and Humidity reports are produced on background, you can analyze data with your own excel formulas.
  • The SNMP thermometer only works when powered from the wall plug adaptor. Why doesn't PoE work?
    On most PoE switches, you need to manually enable PoE power for each individual port. Please make sure that you have enabled PoE for the port where HWg-STE PoE is connected.
  • Where can I find the prices of your devices?
    Ask our distributors, or request a quote directly from us using the form at this page.


Ordering numbers


OID Description
Quote HWg-STE PoE (photo)
PoE SNMP web thermometer package. Contains an AC adapter, a temperature probe on a 3m cable, and CD with software. PoE support (IEEE 802.3af).
Quote HWg-STE (photo)
Standard web thermometer contains an AC adapter, a temperature probe on a 3m cable, and CD with software.



  • temperatureoutdoor temperaturetemperature and humidity probe for Ethernet thermometer Temp-1Wire (temperature probes for SNMP thermometer)
  • Ethernet thermometer humidity accessories Humid-1Wire Ethernet thermometer humidity accessories (humidity probes / combined temperature-humidity probes)
    Can be connected to HWg-STE PoE temperature monitor.


HWg-STE, PoE, SNMP-Thermometer, PoE-Temperaturüberwachung, PoE-Thermometer, Strom über Ethernet Thermometer, IEEE 802.3af, Temperaturwächter, SNMP-Temperatur, Computerraum, Serverüberwachung
PoE-Thermometer, PoE-Temperatursensor, PoE, SNMP, Alarmbenachrichtigung per E-Mail, PoE, Temperatur Bericht, PoE Luftfeuchtigkeit



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  • HWg-STE plus: Ethernet thermometer with Digital Inputs
  • STE2: WiFi and Ethernet Thermometer with Digital Inputs
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  • HWg-WLD - Water Leak detection with sensing cable up to 85m