trustme.bro/r/…
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the claim
A whirling hygrometer measures relative humidity using the psychrometric difference between wet and dry bulb thermometers.
the verdict
COMMON KNOWLEDGE
no citation needed for this one
refutedsupported
the weight of evidence
no sources on either side

This is a statement of basic meteorological and thermodynamic fact, defining how a psychrometer (wet-and-dry bulb thermometer) measures relative humidity, and requires no citation.

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The analysis

The claim describes the standard operating principle of a psychrometer (whirling hygrometer), which uses the psychrometric difference between wet and dry bulb thermometers to determine relative humidity. This is a foundational scientific definition found in basic physics and meteorology textbooks, making it common knowledge that does not require empirical citation.

Everything we examined (12)
We also searched for evidence AGAINST this claim, not only for it.
  1. Occupational heat stress assessment and protective strategies in the context of climate change.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  2. Indicators to assess physiological heat strain - Part 1: Systematic review.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  3. Validation of a Mechanistic Model for Non-Invasive Study of Ecological Energetics in an Endangered Wading Bird with Counter-Current Heat Exchange in its Legs.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  4. Exploration of the effects of classroom humidity levels on teachers' respiratory symptoms.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  5. Wavelength-encoded optical psychrometer for relative humidity measurementpeer-reviewedno side takennot shown: read and judged not to bear on this claim
  6. Effect of microclimate alteration on milk production and composition in Murrah buffaloes.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  7. Spatio-Temporal Optimization of Perishable Goods' Shelf Life by a Pro-Active WSN-Based Architecture.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  8. Simultaneous Temperature and Relative Humidity Measurement Using Machine Learning in Rayleigh-Based Optical Frequency Domain Reflectometrypeer-reviewedno side takennot shown: read and judged not to bear on this claim
  9. The effects of building-related factors on classroom relative humidity among North Carolina schools participating in the 'Free to Breathe, Free to Teach' study.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  10. What's the relative humidity in tropical caves?peer-reviewedno side takennot shown: read and judged not to bear on this claim
  11. Diel patterns of stem CO<sub>2</sub> efflux vary among cycads, arborescent monocots, and woody eudicots and gymnosperms.peer-reviewedno side takennot shown: read and judged not to bear on this claim
  12. An Inexpensive, Stable, and Accurate Relative Humidity Measurement Method for Challenging Environments.peer-reviewedno side takennot shown: read and judged not to bear on this claim
The paper trail · every fact has a biography
first checked05 Aug 2026
judged → COMMON KNOWLEDGE · 9505 Aug 2026
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