Measure, log and report temperature...

The Web Thermometer is a measuring device which monitors temperatures and makes the values available in the network. The device includes an integrated data logger and numerous Web and network services for manual querying of the measurements or provides autonomous sending of messages.

• Sensor:

  • NTC temperature sensor:
    • Measuring range: -45°C...75°C

  Connectivity:

  • Intuitive Web interface for simpler configuration
  • Monitor temperatures and trends from a browser
  • Alarm and reporting function:
    • E-mail for alarm or reporting functions
    • SNMP polling / alarm traps
    • Configure up to 12 alarm messages
  • Dynamic integration into other Web sites:
    • Direct access to current measurement values, e.g. JavaScript (AJAX).
  • Current Industry 4.0 protocols:
    • OPC UA, REST and MQTT support
  • Additional software interfaces for incorporating into your systems/databases:
    • SNMPv1, SNMPv2c, SNMPv3
    • Modbus-TCP
    • OPC UA, OPC DA
    • Syslog
    • Sensobase (database integration via ODBC)
    • TCP and UDP sockets, client and server
    • FTP (data logging)
  • Possible applications:
    • Monitor temperatures in the server room, network cabinet or office
    • Logging of measurements via FTP, Excel file, email attachment and internal memory
    • Green IT: Monitor efficiency of the server room climate control

  Data logger:

  • Internal data logger
    • Memory capacity: min. 16 weeks, max. 20 years
    • Save frequency: 15s, 30s, 1m, 5m, 15m, 60m
  • Document measurement data online in the W&T Cloud and access from anywhere in the world
  • Internal clock
    • Time synchronization via time server calibration
    • Battery-backed device clock

  Standards & more

  • optional: ISO factory calibration per DIN EN ISO/IEC 17025
    • with calibration certificate for verified documentation of the measured value deviations
    • Valid for 12 months
  • optional: DAkkS/DKD calibration per DIN EN ISO/IEC 17025
    • with calibration certificate for verified traceability to national standards
    • Valid for 12 months
  • Supply voltage via Power-over-Ethernet (PoE)
    • Phantom power using data pairs
    • Power over unused wire pairs
    • External power supply is an alternative
  • Conforms to standards both in office and industrial environments:
    • High noise resistance per EN 61000-6-2
    • Low noise emission per EN 55032:2015 + A1 Cl. B, EN 61000-3-2 & EN 61000-3-3
  • 5 year guarantee

Technical Data

Connections and displays:

• Temperature sensor:
  • NTC type
  • DB9 receptacle
  • Cable length: 1m (cannot be extended)
• Network:
  • 10/100BaseT Autosensing/Auto-MDIX
  • RJ45
  • IPv6 on request
• Galvanic isolation:
  • Network connection min. 1500 V
• Power supply:
  • Power-over-Ethernet (PoE) or
  • DC 12V .. 48V (+/-10%) or
  • AC 18Veff .. 30Veff (+/-10%)
• Supply connection:
  • Plug-in screw terminal, 5.08mm spacing
  • Labeled "L+" and "M"
• Current consumption:
  • PoE Class 1 (0.44 - 3.84W)
  • typ. 62mA @24VDC, 80mA @20VAC,
  • max. 70mA @24VDC, 40mA @48VDC
• Displays:
  • 1 LED Power
  • 2 LEDs network status
  • 4 LEDs Status and Error

Measuring unit:

• Sensor:
  • NTC 10k
• Measuring range:
  • -45°C...75°C
• Resolution:
  • 1/10°C
• Maximum measuring error: (measuring unit + sensor)
  • ±0.3°C, ±5.1% 
• Measuring frequency:
  • 4 seconds
• Storage frequency:
  • 15s, 30s, 1m, 5m, 15m, 60m
• Memory depth (4MB):
  • min. 16 weeks, max. 20 years

Housing and other data:

• Housing:
  • Plastic compact housing for top-hat rail mount
  • 105x22x75mm (LxWxH)
• Enclosure rating:
  • IP20
• Weight:
  • approx. 200g
• Ambient temperature
  • Storage: -40..+70°C
  • Operating: Non-contiguous mounting: 0 .. +60°C
  • contiguous mounting: 0 .. +50°C
• Permissible relative humidity:
  • 0..95% RH (non-condensing)
• Ambient operating temperature:
  • 0 .. +60°C
• Scope of delivery:
  • 1x Web-Thermometer NTC
  • 1x NTC Sensor, 1m
  • 1x Quick Guide