The analog manometer, commonly referred to as a Magnehelic ®, is a test instrument that has been around the HVAC industry for decades. Among many technicians in the field, it is still the test ...

From generation to transmission and distribution, the power industry is changing. With distributed energy resources (DERs) increasingly participating in wholesale capacity, energy, and ancillary ...

Anyone who has attempted to measure the pressure drop of a filter mounted in a filter grille will admit it’s a challenge. Some installations have a significant amount of return duct between the filter ...

The flow of all fluids, whether liquid or gas, will have one of three states: laminar, turbulent, and transitional. This article discusses flow principles and pressure-based flow measurement. Laminar ...

ISA recently published the third edition of Calibration Handbook of Measuring Instruments by Alessandro Brunelli. In this Q&A feature, Brunelli highlights the focus, importance, and differentiating ...

The metrology revolution is gathering pace. Hot on the heels of an overhaul of the most fundamental ‘base’ units of measure in the International System of Units (SI) last month, some metrologists are ...

What’s the difference between a transmitter and a sensor? Nine different types of sensor transmitters. How does each type of transmitter work? What are the components of each transmitter type? Sensors ...

Test and measurement instruments evolve over time. The banner improvements come in performance, things like measurement bandwidth and dynamic range. These always make the trade press headlines, but ...