Skip to main content

Data logger for temperature and external sensor LOG40 31.1065


  • For monitoring temperature and one external sensor
  • Memory for 40.000 records
  • MAX/MIN/AVG function, dew point , HI/LO alarm
  • USB interface with automatic PDF export
  • Windows software optional

Item number:



Buy now

Product specification

The LOG40 allows you to accurately monitor and record the temperature, either whilst transporting sensitive products, in cold storage, server rooms or for prescribed test protocols. It can also monitor the temperature in your living spaces over longer periods of time.

The logger can record up to 40,000 data records. The recorded data can be automatically output to your PC as a PDF file via a USB interface. A measuring interval of 15 minutes is pre-programmed. You can also download software for configuration. You can then set the storage interval from 1 second to 24 hours.

An alarm will warn you if certain limit values are exceeded or not reached. An integrated motion detector records and documents vibrations, for example when moving from one place to another or when opening and closing your windows or doors.
There is a status and alarm LED under the display. This device has a maximum and minimum value function, an AVG function and a time marker. The logger is protected against water jets to IP 65 and complies with EU standard 12830.
This device is manufactured entirely in Germany. An ISO certificate is included in the scope of delivery.

Optional sensors can also be connected: 30.3537 (temperature), 30.3538 (temperature and humidity) or 30.3539 (temperature, humidity and air pressure).


  • For monitoring temperature
  • Also for monitoring an additional sensor (sold separately)
  • Precision depending on the measuring range from ±0,5°C (-10...+60°C) rest ±1°C
  • Status and alarm LED with buzzer
  • Memory for 40.000 records
  • MAX/MIN/AVG function, dew point, time marker function
  • Plug and Play - No software required (pre-programmed 15 minutes interval)
  • Automatic output as PDF-file
  • ptional configuration software download
  • Configurable storage interval (1 sec. up to 24 hrs.)
  • HI/LO alarm
  • Motion sensor for shock recording e.g. change of location or door and window opening
  • IP 65 jet water-proof
  • USB Interface
  • According to EN 12830
  • ISO certificate included (measuring point: 23°C)
  • Optional sensors: 30.3537 (temperature), 30.3538 (temperature and humidity), 30.3539 (temperature, humidity and atmospheric pressure)
  • Made in Germany

TFA Quality mark:

  • HACCP conform
  • With certificate
  • Made in Germany

Product information for download:

Technical data

Delivery contents Data logger, mounting parts, batteries, instruction manual
Measuring range temperature -40…+60°C
Material Plastic
Power consumption Batteries
Batteries included yes
Batteries 2 x AAA 1.5 V
Dimensions (L) 40 x (B) 16 x (H) 100 mm
Weight 65 g

Similar products