Extech Humidity and Temperature Datalogger (RHT20)

In stock

This humidity and temperature datalogger can hold 16000 humidity and 16000 temperature readings. With adjustable data sampling rates.

Extech Humidity and Temperature Datalogger (RHT20)


  • USB interface for easy setup and data download to a PC
  • Dew point indication via Windows compatible software (included)
  • Selectable data sampling rate: 2s, 5s, 10s, 30s, 1m, 5m, 10m, 30m, 1hr, 2hr, 3hr, 6hr, 12hr, 24hr
  • User-programmable alarm thresholds for RH and Temperature
  • LCD displays current readings, min/max and alarm status
  • Long battery life (approx. 1 year)
  • Complete with 3.6V Lithium battery, mounting bracket with combination lock, and windows 98, 2000, XP, and Vista compatible analysis software

This humidity and temperature datalogger can hold 16,000 humidity and 16,000 temperature readings. It easily connects to your computer for quick and easy analysis of your collected data. The selectable sampling rate lets you acquire data at exactly the rate you want with a consistent rate. With a wide range from -40 to 158 F (-40 to 70 C) and a humidity range from 0 to 100%. A great way to keep track of your temperature and humidity over a long period of time.


  • Temperature Range: -40 to 158 F, -40 to 70 C
  • Temperature Resolution: 0.1oF/C
  • Temperature Accuracy: +-1.8oF/+-1.0oC
  • Humidity Range: 0 to 100%
  • Humidity Resolution: 0.1%RH
  • Humidity Accuracy: +-3%RH
  • Datalogging Interval: 1 second to 24 hours
  • Memory: Temperature- 16,000 points; Relative Humidity- 16,000 points
  • Dimensions: 3.7 x 1.9 x 1.2" (94.4 x 48.9 x 31.2mm)
  • Weight: 3.2oz (90.7g)

Unit Ship Weight: 2 lbs

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