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Thermologger

The Thermologger is a compact, autonomous temperature datalogger designed for long-term air temperature monitoring in field and environmental applications. It runs independently without external power or equipment and stores data internally.

Technical specification

Size
68 x 22 x 22 mm
Weight
48 g
Battery
Lithium, ~10 years
Memory
524 288 events (~14 years at 15-minute intervals)
Connector
Touch probe for settings and download via TMD Adapter
Temperature sensor
MAXIM/DALLAS DS7505U+
Resolution
0.0625 °C
Accuracy
± 0.5 °C
Measurement range
-40 to +60 °C
(Can measure up to -60 to +85 °C, but extreme temperatures can shorten battery life)

Why choose Thermologger

Standalone, rugged, long-term measurements

  • Works independently without external hardware; keeps logging even if moved by animals or wind.
  • Autonomous logging with long battery life and large memory.

Precise and reliable data

  • High-precision temperature measurements using an industry-grade sensor.
  • Data extraction is quick using the TMD Adapter and Lolly software.

Field-proven in research and deployments

Thermologgers and other TOMST dataloggers are used worldwide - from forests and mountains to wetlands, deserts, and agricultural landscapes - for microclimate and air temperature monitoring. They also contribute to open datasets for soil moisture and temperature in regions like Africa and Cuba, supporting hydrology, drought assessment, and model validation.

Easy data handling & cost-effective

  • Lolly software lets you download, visualize, export, and reconfigure measurement intervals.
  • Lower cost than many commercial dataloggers, enabling large spatial or dense network deployments.

Typical use cases

  • Long-term ambient temperature monitoring in ecology, climatology, hydrology, and soil science.
  • Environmental monitoring in agriculture, forestry, and horticulture.
  • Field research in remote, hard-to-reach, or extreme locations where traditional measurement equipment struggles to survive (e.g., polar regions).

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