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Extech RHT20 Humidity and Temperature Datalogger, -40 to 70°C
Model: RHT20

Takes up to 16,000 readings for RH/Temp & user-programmable sample rate.

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$125.99 USD

was $139.99

Availability: 3 Days

Extech RHT20 Offers

The RHT20 is a Humidity Temperature Datalogger which records up to 16,000 Humidity and 16,000 Temperature readings with a user programmable sample rate. USB interface for easy setup and data download. Dew Point indication via the included Windows-compatible software. Selectable data sampling rates of 2s, 5s, 10s, 30s, 1m, 5m, 10m, 30m, 1hr, 2hr, 3hr, 6hr, 12hr, and 24hr. User-programmable alarm thresholds for RH and Temperature. LCD displays current temperature and humidity readings plus Min/Max and Alarm status. Long battery life. Datalogger records temperature and humidity at sample rate set by user. Connect the datalogger to your PC via the USB interface to retrieve readings. Datalogger displays the current Humidity and Temperature plus Min/Max and alarm status so it can viewed anytime during the recording process.


  • USB interface for easy setup and data download
  • Selectable data sampling rate: 1 second to 24 hours
  • User-programmable alarm thresholds for RH and Temperature
  • LCD displays current readings, Min/Max, and alarm status


  • Storage Bins
  • Cargo Hold
  • Freezers
  • Temperature Controlled Rooms

Extech RHT20 Specifications

Temperature Range -40 to 158°F / -40 to 70°C
Humidity Range 0 to 100%RHH
Datalogging Interval 1 second to 24 hours
Memory Temperature: 16,000 points; Relative Humidity: 16,000 points
Weight 0.8oz (24g)
Click here for complete specifications on the Extech RHT20

What's included with the Extech RHT20

  • Battery
  • Mounting Bracket
  • Windows Compatible Software for Analysis
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