In this episode, we discuss the pros and cons of three of the most common technologies used to measure humidity.Thin film polymerChilled mirrorAluminum oxideSteve will share some examples of each where the technology is a good fit and a few examples of where the technology is not a good fit. The goal of this episode is to help people make the correct choice up front and avoid the high cost of replacing a faulty solution.A podcast by Bruce McDuffee and Steven Santoro of Vaisala

In this episode of Humidity Matters, Steve and I discuss the measurement parameter of wet bulb and the technology itself. Wet bulb is a convenient and fundamental measurement, but it does have drawbacks. Tune in and learn a bit of history, some interesting applications, and how the measurement works.We mentioned the psychrometric chart, which is a great visual aid to learn more about the interrelations of wet bulb and other humidity parameters. If you'd like a copy, just email me at [email protected], and I'll send you a copy of the chart.A podcast by Bruce McDuffee and Steven Santoro of Vaisala

In this episode, we discuss the absolute parameters used to quantify the absolute amount of water vapor present in a gas. Mixing ratio, parts per million, and dewpoint are defined as absolute measures. Steve shares a few real applications where these parameters make sense and one where it would not make sense to use.As promised, feel free to access and use these resources to optimize your humidity measurement process:Humidity calculatorHumidity conversion formulasA podcast by Bruce McDuffee and Steven Santoro of Vaisala

Dalton's Law of Partial pressures is the basic principle for measuring water vapor or humidity. When you understand how we arrive at the basic measurement of the amount of water vapor in the air, you will have a better understanding of how to make a better measurement.We discuss how the partial pressure of water vapor and the saturation vapor pressure work together to define relative humidity. When you can picture this concept, you can start to put together the pieces of each parameter you wish to measure.Humidity Conversion Formulas from VaisalaA podcast by Bruce McDuffee and Steven Santoro of Vaisala

We discuss a bit of history around how people measured humidity 700 years ago and the Vaisala technology that revolutionized the way humidity is measured in the modern age. Bruce and Steve discuss:How humidity was measured with wool and a scaleMeasuring with a lyre string or horse hairGoldbeater's skin as a measurement mediumSolid state technology invented by VaisalaA podcast by Bruce McDuffee and Steven Santoro of Vaisala

This is our pilot episode and we start with the most basic question, what is humidity? We'll discuss the definition of humidity which is not as simple as it may seem. Is there a difference between humidity and relative humidity? We discuss how temperature can affect the measurement. Drawing on more than 35 years of experience, Steve discusses some typical applications where humidity is a critical parameter for quality and energy efficiency.A podcast by Bruce McDuffee and Steven Santoro of Vaisala

In this episode, we'll discuss dewpoint. Dewpoint is a measure of the amount of water vapor in the air or in any gas. It is a temperature expressed in degrees F or degrees C. Steve will share a few examples of applications where dewpoint is used to maintain product quality and energy efficiency. Learn how changes in pressure can affect the accuracy of the measurement.A podcast by Bruce McDuffee and Steven Santoro of Vaisala