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HWg-STE: Ethernet thermometer

HWg-STE is an ethernet web thermometer with MS Excel reporting software. Alerts by e-mail to high temperature, SNMP support.
Up to two temperature/humidity probes can be connected. Supplied with temperature probe, power adaptor and software.

The HWg-STE web thermometer is configured using a built-in web server. If the temperature (humidity) exceeds a specified threshold, an e-mail alert is sent. Free windows software HWg-PDMS for graphical overview and MS Excel export included.
The HWg-STE IP Thermometer is fully SNMP compatible.

  • Temperature monitoring, E-mail alert to overheating or temperature drop
  • Windows software, AC power adapter and temperature probe included
  • Simple installation, supports DHCP


Optional accessories:

  • Humidity probe
  • Temperature and humidity probe for installation in a 19" rack
  • 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)
web Ethernet thermometer supports SNMP and e-mail

The Device
   Rear view   Paper box

 Open package  Package contents   MS Excel report



  • Air conditioning failure
    Temperature monitor; rising temperature indicates cooling fault.

  • 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 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.

  • Remote rack monitoring
    Temperature / humidity monitoring inside and outside of a rack, SNMP monitoring.


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
  • IP Thermometer and hygrometer: excel reports, email alerts to high temperatureEthernet: RJ45 (100BASE-T) (PoE version IEEE 802.3af)
  • Web: Built-in web server
  • MT web: Index web page available also in format for mobile telephone browsers
  • M2M communication protocols: SNMP (161), XML (read only)
  • 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: Logging of values, graphs, export to MS Excel, reports, freeware for 3 sensors
    • 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

Ethernet thermometer for temperature monitoring over IP, Email alerts to high temperature, web interface for the web thermometer

  • 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:
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    Spam protection. How many is SIX times six?

  • How can I plot the temperature in a graph?
    Use the supplied free HWg-PDMS temperature monitoring 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.
  • Can I connect also humidity sensor to the HWg-STE?
    Yes, order additional humidity sensor and click it to the second RJ11 connector.
  • 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.
  • Can I connect the Pt100 or Pt1000 external temperature probes to the HWg-STE plus?
    No, external temperature probes Pt100 and Pt1000 are connected via the Converter 2xPt100 1W-UNI. This product can't be used with HWg-STE or HWg-STE plus devices.
  • Where can I find the price of this simple WEB Thermometer?
    Ask our distributors, or request a quote directly from HW group.


Ordering numbers


Order code Description
HWg-STE HWg-STE: Ethernet thermometer
Standard web thermometer contains an AC adapter, a temperature probe on a 3m cable, and CD with software. - Photo
HWg-STE PoE HWg-STE Ethernet thermometer with PoE
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). - Photo
Humid-1Wire 3m Relative Humidity sensor (0 to 100% RH) on a 3 meters long cable with a 1-Wire RJ11 connector. Indoor usage, probe encased in white plastic. - Photo



  • 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 temperature monitor.


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