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Connector Type
USB Connectors
Sensor Type
Temperature / Freeze
Tool Type
Temperature Measurement
Auto-Shut Off
Battery Operated
LCD Display
LED Feedback
Visual Indicator
Ease of Installation
Beginner (Installs < 10 minutes)
Extech Instruments
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Record Humidity, Temperature and Atmospheric Pressure Samples
Extech Instruments RHT50 Humidity/Temperature/Pressure Datalogger
Extech Instruments RHT50 Humidity/Temperature/Pressure Datalogger
Extech Instruments RHT50 Humidity/Temperature/Pressure Datalogger
Item# 90217
Price: Normally $159.99 
Hot Deal $134.93
Free shipping on orders over $50 - See Details


  • Datalogs readings with a user programmable sample rate
  • USB interface for easy set-up and data download
  • Selectable Atmospheric Pressure Units: psi, hPa, kPa, and bar
  • Selectable data sampling rate from 1 minute to 18 hours

Essential Info

The Extech Instruments Relative Humidity/Temperature/Atmospheric Pressure Datalogger measures and stores up to 10,000 readings. The user can easily configure the logging rate, high/low alarm and start-mode. It also downloads the stored data by plugging the module into a PC USB port and running the supplied PC software. Data can then be graphed, printed and exported to other applications. The data logger is supplied with a 3.6V ½ AA lithium battery with a very long battery life. This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable service.

  • Datalogger Memory stores 10,000 temperature, humidity and pressure readings
  • Selectable data sampling rate: 1 second to 18 hours
  • Manual and automatic datalogger start
  • Status Indication via Red/Yellow LED and Green LED
  • USB Interface for Set-up and Data Download
  • User-Programmable Alarm Thresholds
  • Long battery life

  • Manuals/Software

    What's Included

    1x - Humidity/Temperature/Pressure Datalogger
    1x - 3.6V Lithium Battery
    1x - Mounting Bracket
    1x - Analysis Software
    1x - Instruction Manual


    ManufacturerExtech Instruments
    Manufacturer Product NoRHT50
    Resolution0.1%RH, 0.1°C/F, 0.1hPa
    Data storage10,000 measurements
    Logging rateFrom 1 second up to 18 hours
    Operating Temperature -31 to 176°F (-35 to 80°C)
    Battery type3.6V (1/2 AA) Included
    Battery life1 Year Typical
    Dimensions4" x 1" x .9" (101 x 25 x 23mm)
    Weight6oz (172g)
    Relative Humidity0 to 20 and 80 to 100%
    20 to 80%
    Temperature -40 to 32°F and 104°F to 158°F
    -40 to 0°C and +40 to +70°C
    Pressure950 to 1050hPaAccuracy: ±0.25%FSO @ (25°C)

    Important notes:
    Only defective exchanges for identical item within 30 days of purchase. No other returns allowed on this item. For defective returns after 30 days, please contact the manufacturer.
    Manufacturer contact information: Extech Instruments Corp, Tel: (781) 890-7440 Ext 200


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