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This sling psychrometer has a reservoir for automatic wick wetting and a built-in slide rule for calculating humidity based on dry and wet bulb readings. Farenheit (25 to 120F) and Celcius (-5 to 50C) models available.
Become a SciStarter Ambassador!
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Applications to join the final cohort in this inaugural class of SciStarter Ambassadors due May 2nd

Libraries and community organizations need your help to spark excitement for citizen science and keep the momentum going!

The SciStarter Ambassador Program offers FREE training to volunteers ready to make an impact in their communities.

Ready to make a difference? Complete your application by May 2nd to join the movement!