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Humidor Hygrometer


  • Hygrometer battery replacement
  • How often does the hygrometer refresh?
  • Where to place the hygrometer?


A hygrometer is an instrument used to measure the specific humidity of the atmosphere it is in.

  • See Hygrometer Instructions for instructions.
  • The Sub-Zero hygrometer differs from others on the market, as it shows only relative humidity and is not programmable and will not show temperature.

The Sub-Zero Hygrometer has double-sided tape on the back, so it can attach to the inside lid of the humidor or it can be set inside the humidor without using the tape.

  • Place the hygrometer inside the humidor, as it cannot measure humidity inside the humidor from the outside.
  • The hygrometer refreshes every 35 seconds to prevent the humidity reading from changing as quickly as other hygrometers.

The hygrometer has a replaceable, flat, watch style battery with a life of 3 to 5 years. 

  • The hygrometer uses any of the following battery sizes: AG10, SR54, or LR54.
  • Remove the plastic tab on the back of the hygrometer to turn on the hygrometer.
  • If the display is blank after removing the tab, the battery may have shifted. Remove and reseat the battery. 
  • The hygrometer has a tolerance of +/- 2%, and is very accurate compared to others on the market.

Refer to the product Use and Care Guide for further information.


Need further assistance? Contact Customer Care at 800.222.7820 or provide your information below and request a Customer Care representative contact you.

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