You can automatically compute and record relative humidity from dry bulb temperature and wet bulb temperature.

• Temperature and humidity can be displayed simultaneously
  The µR10000/µR20000 can display in a variety of formats. For example, temperature and humidity can be shown together by setting up independent displays on the top and bottom rows.
• Computation expressions can be edited at will
  Because expressions and their constants can be set arbitrarily, you can enter various formulas (SPRUNG, PERNTER, etc.) and constants according to the conditions of your thermostatic chamber.
• Computed results can be recorded together with temperature and humidity (voltage and current)
  
• No humidity converter required
  No extra equipment such as a humidity converter is needed because you can automatically calculate relative humidity from the dry and wet bulb temperature sensor input by entering expressions for determining vapor pressure and saturated water vapor pressure on the µR's computation channels (M1 option).

- µR10000/µR20000 Intelligent Industrial Recorders