iButton Temp & Humidity Logger

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The iButton temperature and humidity logger is one of the smallest and most affordable data loggers available, yet it doesn't sacrifice accuracy or features.

This rugged, self sufficient device measures and logs readings for temperature, humidity or both at a user defined intervals and holds over 8,000 readings. Every iButton is engraved with a unique registration number and has a durable, stainless steel case that is highly resistant to dirt, moisture, and shock. These loggers can be easily attached to a pallet, tossed in a shipping box or attached to the wall in an office or warehouse.

iButton Temperature & Humidity Sensor Features:

  • Durable, stainless steel case is factory-lasered with a unique registration number to assure traceability
  • Individually calibrated in a NIST traceable chamber
  • Automatic wake up after a specified delay or temperature alarm
  • Built-in humidity sensor for simultaneous temperature and humidity logging
  • Hydrophobic filter protects against dust, dirt, moisture and contaminants
  • Programmable high and low alarms for temperature and humidity
  • Two-level password protection for retrieving data
  • Calibration coefficients are factory programmed into the nonvolatile memory

iButton Temperature Specifications: 

  • Ranges:
    • Temperature: -4°F to 185°F (-20°C to 85°C)
    • Humidity: 0 to 100%
  • Accuracy:
    • Temperature: less than ±0.9°F (0.5°C) from 14°F to 149°F
    • Humidity: ±5%
  • Resolution:
    • Temperature: 0.5°C (8-Bit) / 0.0625°C (16 bit)
    • Humidity: 0.6% (8 bit) / 0.04% (16 bit)
  • Memory: 8 bit or 16 bit format
  • Data Capacity: 4,096 (16 bit) or 8,192 (8 bit) readings
  • Logging Rate: Programmable from 1 sec to 273 hrs
  • Battery Life: Up to 7 years
  • Size:  17.35mm diameter x 5.89mm depth


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