Thermal Dispersion Flow Switches

Thermal Dispersion Flow Switch, Series TDFS2

Dwyer Instruments, Inc. offers several flow measuring products that use a thermal sensing element.

Thermal dispersion flow sensors use a temperature element that is heated up beyond the media temperature. Based on calorimetry, the flow moving past the sensor will have a cooling effect that is directly proportional to the flow velocity. The heat is convected from the heated probe surface to the boundary layer of the fluid flowing over the heated surface. Continue reading “Thermal Dispersion Flow Switches”

Ask the Expert: How should I decide which flow meter would be best for my application?

Question: I need to decide on a flow meter for my application. I see that your Rate-Master® Polycarbonate Flowmeter, Series RM, and Visi-Float® Acrylic Flowmeter, Series VF, are the most popular series; how should I decide which would be best for my application? Continue reading “Ask the Expert: How should I decide which flow meter would be best for my application?”

Mechanical vs. Non-Mechanical Flowmeters

Insertion flowmeters provide a great alternative to inline flowmeters because they are typically less expensive and easier to install than inline meters. But how do you know which type of insertion meter to choose?

There are two primary types of insertion flowmeters: mechanical and non-mechanical. It’s vital to understand the application and benefits of each type of meter, to ensure the best instrumentation solution for your application. Continue reading “Mechanical vs. Non-Mechanical Flowmeters”