TFA Dostmann LOG40 ISO Calibrated Temperature Data Logger USB PDF, -40 to +60 °C

With an ISO calibration certificate included, the TFA Dostmann LOG40 temperature data logger delivers reliable monitoring from -40 to +60 °C with ±0.5 °C accuracy in the critical -20 to +40 °C range. It stores up to 20,000 readings and generates PDF reports directly via USB without any software installation.

Overview

The LOG40 is a professional temperature data logger designed for cold chain monitoring, storage facilities, and transport. It features a clear LCD showing current, minimum, and maximum values, plus alarm status. Configuration of logging intervals, alarm limits, and start modes is done via PC software, while daily use requires no drivers—just plug into USB to get an automatic PDF report.

What stands out

• ISO factory calibration certificate included
• Automatic PDF report generation via USB
• 20,000 data point memory
• Adjustable logging interval from 30 seconds to 24 hours
• Visual LED alarm for high/low temperature limits
• IP65 splash-proof housing
• Long battery life: approximately 2 years at 15-minute logging

Technical details

• Measuring range: -40 to +60 °C
• Accuracy: ±0.5 °C (-20 to +40 °C), otherwise ±1.0 °C
• Resolution: 0.1 °C
• Memory: 20,000 data points
• Logging interval: 30 seconds to 24 hours
• Interface: USB 2.0
• Display: LCD (current, min/max, alarm status)
• Power: 1x 3.6V Lithium Battery (1/2 AA)
• Protection: IP65
• Start mode: manual or programmed
• Stop mode: full memory or fixed number of measurements

Our verdict

The LOG40 is a robust, user-friendly data logger for anyone needing documented temperature records without complex software. Its ISO calibration and PDF-on-USB feature make it a practical choice for compliance and quality assurance.