Temperature & humidity measurement and wireless transmission

Temperature and humidity logger

Newsteo Data Logger for wireless measure of temperature, humidity and dew point

The Newsteo temperature and humidity logger is a wireless device which enables to oversee at distance the temperature and the humidity of an environment. Then, this temperature and humidity datalogger can transfer the data directly on a receiving station (monitoring computer, gateway) by radio frequencies or can store the data in its memory.

The product is available into 3 versions depending on the needed precision:

  • LOG20 : Temperature sensor accuracy : +/- 0.5°C and Humidity sensor : +/- 4.5% , dew point temperature
  • LOG22 : Temperature sensor accuracy : +/- 0.4°C and Humidity sensor : +/- 3% , dew point temperature
  • LOG25 : Temperature sensor accuracy : +/- 0.3°C and Humidity sensor : +/- 2% , dew point temperature
  • LOG12 : Temperature sensor accuracy : +/- 0.4°C and Humidity sensor : +/- 3% , dew point temperature,
    Compact design
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Where the measurements will be displayed ?

2 choices to create your wireless sensor network:

  • Local single-site solution: you have a small installation (some dataloggers, located near the supervisory position). In this case, the RF Monitor software is appropriate. You install this software on a computer and connect the RF-to-USB Key (radio receiver, provided by Newsteo) to a USB port.

    > More about single-site solution


  • Multi-site solution with remote monitoring: you want to display the measurements of your dataloggers via different PCs located in different sites. The Newsteo Cloud offer allows you to send all the measurements of your recorders to the cloud and access it through a Web application, Webmonitor.

    > More about multi-sites installations

Who uses the temperature and humidity dataloggers?

  • Museum curators: an easy and convenient way to constantly check the humidity level
  • Fragile good storage: constantly monitor the level of temperature and humidity

How does it work?

Installing recorders / Data Loggers

Technical specifications of the Newsteo Logger for temperature and humidy


Temperature and Humidty data logger



Temperature measure range

-40°C … +70°C

Temperature Accuracy @25°C

LOG20 : ±0.5°C
LOG22: ±0.4°C
LOG25: ±0.3°C
LOG12: ±0.4°C


Temperature Resolution

0.01 °C

Humidity Measure Range

0 … 100%RH
Non condensing atmosphere

Humidity Accuracy

LOG20 : ± 4.5% RH (20…80%RH)
LOG22: ± 3% RH (20…80%RH)
LOG25: ± 2% RH (10…90%RH)
LOG12: ± 3% RH (20…80%RH)

Humidity Resolution


Dew point temperature


Measurement frequency

Can be set from one measure every minute, to one every 4 hours

Memory Capacity

32 768 measurements with date and time

Measurement securisation

Acknowledgment process between the transmitter and the receiver to ensure that no data is lost during radio transmission
Back-up of the last 32.000 measurements in Logger memory even after transmission to the receiver


COFRAC certification on order


1/2 AA (Lithium Thionyle) – 3,6V


Up to 2 years (at 25°C with a frequency measure of 15 minutes)


LOG20,LOG22,LOG25: Height without antenna : 25 mm, with antenna : 99 mm / Width : 96 mm / Depth : 40 mm
LOG12: Height : 20 mm / Width : 96 mm / Depth : 40 mm

Weight with battery




IP level

IP54 (Non Condensed Atmosphere)

Radio frequency

ISM 868 MHz

Radio range

LOG20,LOG22,LOG25: Up to 800 meters (with supplied antenna)
LOG12: Up to 100 meters (internal antenna)


1/4 wave antenna (included)


Evaluate the Newsteo logger: wireless temperature and humidity logger kit

This kit enables you to estimate a ready-to-use product, the Newsteo Logger (integrating measure, storage and timestamp).
The kit is made of:

  • A Newsteo Logger LOG22
  • A RF-to-USB Key medium-range (¼ wavelength antenna integrated)
  • A CD-ROM containing the installation of the RF Monitor software with USB drivers, the application software of the Logger which enables the restoration of the recorded measures, and the documentation.

Price of the kit: 415 EUR excl. VAT, preparation and shipping costs in addition.