• RH550
  • Manufacturer has 11 in stock
    This stock is typically available to ship in 3 - 5 working days.



  • Measuring ranges:
    • RH: 10% to 95% RH
    • Temp (cable): 14 to 104°F (-10 to 40°C)
    • Temp (tablet): -4 to 176°F (-20 to 80°C)
    • Dew point: -4 to 176°F (-20 to 80°C)
  • 16 GB internal memory storage
  • 1 sec to 24 hrs sample rate
  • Connect up to 3 cables

What's in the Box

  • Built-in stand
  • Wall mount bracket
  • Detachable probe (RH550-P)
  • Probe cable (RH550-C)
  • USB cable
  • Universal adaptor with multi-plugs
  • Internal rechargeable Lithium Polymer battery


The Extech RH550 Humidity/Temperature Chart Recorder simultaneously datalogs and monitors relative humidity, temperature, and calculated dew point on the Extech RH550. It features live or user-scheduled recording time and programmable Min/Max alarm set points. A built-in stand is included for desktop use, as well as a bracket for wall-mounting. The RH550 also features a field-replaceable probe that can be attached to the monitor or on a 6.5 ft (2 m) cable. This recorder is useful in office buildings, conference rooms, labs, hospitals, cleanrooms, greenhouses, food storage facilities, and more.