24 or 72 Hours? That Is the Question…

Product Update: The Rapid RH® 4.0 shown in this video has been replaced by the Rapid RH L6.

Jason Spangler, Vice President of Sales for Wagner Meters, walks through key findings from a laboratory study of RH sensor performance. He covers:

  • How closely Rapid RH sensors equilibrate within the first hour
  • How that reflects Wagner’s design principles
  • How the 24, 48, and 72-hour readings compare
  • What the data shows on inspection
  • What the results imply for the equilibration period specified in ASTM F2170

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Last updated on August 18th, 2026

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