What is not a measuring element?

In the context of this question, weight is considered a measurable property, but it does not align with the typical measuring elements used in piping and fluid systems, which are often related to the state or condition of a gas or liquid. Measuring elements like temperature, pressure, and humidity specifically pertain to the characteristics of fluids that can significantly impact system performance and design in piping applications. These factors can be essential in determining flow rates, designing for thermal expansion, and ensuring material compatibility.

Weight, while an important physical property, is more commonly used in structural applications rather than as an operational measurement in systems involving fluids. Therefore, when discussing measuring elements in a piping context, temperature, pressure, and humidity are the primary focus, making weight the outlier in this list.