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Web Thermo Hygrograph

Web Thermo Hygrometer

NEW: Temperatures and relative humidity to the Power-over-Ethernet network


Background information:

Like all models in the Web-IO Climate series, the Web-Thermo-hygrometer 57720 everything that is needed to connect a temperature and humidity sensor to the computer network. Moreover, the power supply, according to the IEEE 802.3af standard (P ower- o comparison E thernet), via the network cable, with both phantom power over the data pairs as well as power on the unused at 10 / 100BT pairs is supported. Problems with outlets, country-specific plug types, various AC voltages etc. are a thing of the past. 



  • Supply voltage via Power-over-Ethernet (PoE)
    • Phantom power using data pairs
    • Power over unused wire pairs
    • Alternate external supply possible
    • NEW! Redesigned, intuitive configuration interface
    • NEW! Up to 12 alarms can be configured
  • NEW! Cloud Measurement data online in the W & T document measurement-Cloud

  • REST and MQTT support in preparation
  • Monitor temperatures and curves with your browser
    • Design of HTML pages user configurable
    • Direct access to current measured value eg for integration into other Web pages
  • SNMP polling / Alarm traps for temperature and humidity values ​​for incorporating into your existing SNMP management system
  • E-mail for alarm or as reporting function
  • Time synchronization via time server calibration
  • Connections:
    • 10 / 100Mbit
    • Combined temperature-humidity sensor
  • Easy Start:
    • Connect sensor and network cable
    • Connect power supply
    • Assign IP number
    • ready
  • Application examples:
    • Monitor temperatures in the server room, network cabinet, office
    • Direct display of multiple measuring points in the browser via Java applet
    • Alerting when limits are exceeded via e-mail, SNMP trap, TCP client, Syslog
    • Logging of the measured values ​​via FTP, Excel file, e-mail attachment, internal memory
    • Dew Point
    • Air monitoring
  • Software interfaces
    • HTTP, Web browser
    • AJAX, JavaScript and Java applet
    • TCP and UDP sockets, client and server
    • OPC server
    • SMTP (email)
    • SNMP (including trap)
    • SYSLOG
    • FTP (data logging)
  • Green IT: Monitor efficiency of the server room climate control
  • Conformance to standards both in office and industrial environments:
    • high noise immunity for industrial areas
    • low noise emission for residential and commercial areas
  • 5 years warranty
Gift   Wish for something! Your suggestions for improvement and additions



Thermo-Hygro Probe:   I2C connector
Network:   10 / 100BaseT autosensing This email address is being protected from spambots. You need JavaScript enabled to view it.
Supply voltage:   Power-over-Ethernet or
12-48V DC (+/- 10%) or
18Veff-30Veff AC (+/- 10%) via screw
Measuring unit    
Measuring range:   -40 ° C ... 85 ° C, 0..100% rh
Resolution:   10.1 ° C, 1/10% RH
Measurement error:   Temperature:
    typ. @ 25 ° C ± 0.3 ° C
max. @ -40..85 ° C ± 1.5 ° C
    typ. @ -20..60 ° C (normal range) ± 1.8% RH (10-90% RH)
max. @ -20..60 ° C (normal range) ± 4% RH (0-100% RH)
temporarily @ -40..85 ° C (max range) + 3% RH after 60h operation outside normal range
Long-term stability: typ. <0.5% RH / year
Measuring frequency:   4s
Memory frequency:   15s, 30s, 1m, 5m, 15m, 60m
Memory depth (4MB):   minute 12 weeks, max. 20 years
other data    
Galvanic isolation:   Signal inputs to network: min. 500 Volt
Power consumption:   AVG: 62mA @ 24VDC, 80mA @ 20VAC,
Max: 70mA @ 24VDC, 40mA @ 48VDC
PoE Class 1 (0.44 - 3.84W)
Housing:   Plastic compact housing, 105x75x22mm
Weight:   about 200g
Ambient temperature Storage:   -40 .. + 70 ° C
Ambient temperature Operating:   non-cascaded: 0 .. + 60 ° C
cascaded: 0 .. + 50 ° C
Humidity:   0..95% RH (non-condensing)
Scope of supply:   1x Web-Thermo-hygrometer for DIN rail mount
1x W&T sensor, 2m (temperature and humidity)





Send messages - when limits are violated or timer-based - for informational purposes directly to the responsible technical as an e-mail or as a reroute via SMS.


After the device has been configured for and connected to your network, the following steps are still necessary.

Open the profile for configuring e-mail alarm messages. e-57606-35-pide-000
Enter the desired parameters. e-57606-36-pide-000
When the limit you have set is exceeded, the device sends an e-mail which can also be transmitted as an SMS message using special functions available from cellular phone service providers. e-57606-37-piww-000




Power Supply

Plug-in Power Supply, 24V / 220mA DC with Euro plug WT11020
Plug-in Power Supply, 24V / 650mA DC with Euro, US and UK plug WT11024
Power Supply for DIN rail mount, 24V / 630mA DC
(merchandise, 2-year manufacturer’s guarantee)

Mechanical Accessories

Mounting bracket for wall mounting 58812
19" DIN rail 58813
IP wall mount housing, 180 x 130 x 175 mm WT11120


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