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Data sheet:

Web-Thermo-Hygrometer

  • Monitor temperatures and relative humidity

Measure, log and report...

The Web-Thermo-Hygrometer is an instrument that measures temperatures and relative humidity 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.

Properties

Sensor:

  • Temperature sensor:
    • Measuring range: -40°C...85°C
  • Relative humidity sensor:
    • Measuring range 0..100% RH, permissible ambient: 0..95% (non-condensing)

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:
    • REST and MQTT support
  • Additional software interfaces for incorporating into your systems/databases:
    • SNMPv1, SNMPv2c, SNMPv3
    • Modbus-TCP
    • OPC server
    • 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
    • Direct display of multiple measuring points in the browser via Java applet
    • Logging of measurements via FTP, Excel file, email attachment and internal memory
    • dew point measurement, climate monitoring
    • Green IT: Monitor efficiency of the server room climate control

Data logger:

  • Internal data logger
    • Memory size: min. 12 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 for industrial environments
    • Low noise emission for residential and business areas
  • 5 year guarantee

Technical data

Connections and displays:

  • Combined sensor:
    • Temperature and relative humidity measurement
    • DB9 receptacle
    • Cable length: 2m (can be extended to max. 20m)
  • Network:
  • Galvanic isolation:
    • Network connection min. 1500 V
  • Supply voltage:
    • 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:

  • Measuring range:
    • -40°C...85°C, 0..100% rh
  • Resolution:
    • 1/10 °C, 1/10% rH
  • Display variables:
    • °Celsius, °Fahrenheit, °Kelvin,
      %relative humidity, abs. humidity g/m³, dew point °C,
      mixing ratio g/kg, enthalpy kJ/kg

  • Measuring error:

    • Temperature:
    • typ. @ 25°C ±0.3°C
    • max. @ -40..85°C ±1.5°C

    • Relative humidity:
    • typ. @ -20..60°C (normal range) ±1.8%rH (10-90%rH)
    • max. @ -20..60°C (normal range) ±4%rH (0-100%rH)
    • temporary @ -40..85°C (max range) +3%rH nach 60h Operation outside normal range
    • Long-term stability typ. <0.5%rH / year

  • Measuring frequency:

    • 4s
  • Storage frequency:
    • 15s, 30s, 1m, 5m, 15m, 60m
  • Memory depth (4MB):
    • min. 12 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)
  • Scope of delivery:
    • 1x Web-Thermo-Hygrometer
    • 1x W&T SENSOR, 2m (temperature, relative humidity)
    • 1x Quick Guide

Accessories

  • Power supplies

    • Plug-in power supply, 24V / 500mA DC with Euro plug
    • 11021
    • 19.00€
    • Plug-in Power Supply, 24V / 750mA DC with Euro, US and UK plug
    • 11026
    • 34.00€
    • Power supply for DIN rail, 24V / 630mA DC
      (merchandise, 2-year manufacturer’s guarantee)
    • 11080
    • 29.00€
  • Storage and Visualization

    • Motherbox 3
    • 50504
    • 298.00€
  • Measuring - Accessories

    • Replacement sensor for 57720/57620 (device version prior to December 2018)
      Initial calibration of this article only with complete unit.
    • 57025
    • 148.00€
    • Replacement sensor for 57720 (Device version December 2018 and later)
      Initial calibration of this article only with complete unit.
    • 57037
    • 148.00€
    • Retrofit with sintered cap for 57713/57720/57613/57620
    • 57021
    • 19.98€
    • ISO factory calibration (temp. and humidity) for complete device with calibration certificate, valid for 12 months
      Delivery time approx. 10-14 days
      (This article cannot be ordered as a sample.)
    • 57012
    • 198.00€
    • Accredited DAkkS/DKD calibration (temp. and humidity) for complete device with calibration certificate, valid for 12 months
      Delivery time approx. 10-14 days
      (This article cannot be ordered as a sample.)
    • 57027
    • 298.00€
  • Mechanical Accessories

    • Mounting bracket for wall mounting
    • 58812
    • 9.98€
    • 19" DIN rail
    • 58813
    • 19.00€
  • Supplementary network products

    • Ethernet Switch Industry, 4 Port
    • 55604
    • 198.00€
  • Free Product CD

    • W&T Product CD
      (manual, tools & drivers)
    • 10001
    • optional
  • Software

    • Web-IO2Go (app for iOS)
    • 57700
    • free
    • Download

* Our offering is intended only for commercial users. We will be happy to refer private end customers to trading partners through whom our products can be purchased.