Extech 42280


Temperature and Humidity Datalogger



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Datalogs up to 16,000 readings with USB interface for downloading to a PC

  • The 42280 is an Extech Temperature and Humidity Data logger. Data logs up to 16,000 readings.
  • Featuring a USB interface for downloading to a PC. Triple LCD displays humidity, temperature and date (year, month and day).
  • Temperature range from -4 to 144°F (-20 to 70°C). Complete with Windows compatible software, USB cable, Universal AC adaptor, and four AA batteries.


  • Triple LCD displays Humidity, Temperature, and date (Year, Month, and Day)
  • Programmable from keypad or PC
  • Selectable data sampling rate
  • User programmable audible and visual alarms
  • Wall, desktop, or tripod mount
  • Calibration via optional salt bottles
  • Complete with Windows® compatible software, USB cable, universal AC adaptor, and four AA batteries


Specifications Range Basic Accuracy
Temperature -4 to 144°F (-20 to 70°C) ±1°F/0.6°C
Humidity 0 to 100% ±3%
Dew Point 32 to 122°F (0 to 50°C)
Memory Temperature: 8,000 points; Humidity: 8,000 points
Dimensions 4.75 x 3.5 x 1.5″ (120.7 x 88.9 x 38.1mm)
Weight 5.7oz (163g)