Question: Can the Flotect® Vane-Operated Flow Switch, Series V4, be installed in a vertical pipe run?
Continue reading “Ask the Expert – Flow Switch Installation in a Vertical Pipe”
Ask the Expert – Flow Switch Installation in a Vertical Pipe
What is parallax error and how can I avoid it?
What is parallax error?
Parallax error is when the pointer of a device looks like it’s at a different reading when read to the side compared to when read face-on. This is caused by the distance between the scale and the pointer. Because they’re not on the same plane, readings may not appear accurate when viewed at an angle. Continue reading “What is parallax error and how can I avoid it?”
Ask the Expert – Monitoring Air Filters with the Magnehelic® Gage
Question: Is there a kit I can buy with the Magnehelic® Differential Pressure Gage for monitoring air filters, so that I don’t have to buy all the tubing, static pressure tips, and a bracket separately?
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Non-Dispersive Infrared (NDIR) Carbon Dioxide Sensors
Dwyer offers several carbon dioxide measuring products that use non-dispersive infrared sensors as the sensing element. Carbon dioxide sensors are commonly used in building automation systems to monitor air quality. The level of carbon dioxide is indirectly proportional to the amount of people in a space and can be used to adjust ventilation for the space.
There are two basic types of gas sensing technologies: chemical reaction and infrared spectroscopic. Most chemical reaction sensors are electrochemical sensors, which are not as reliable as they can interact with multiple gases and wear from interaction with the gas. Continue reading “Non-Dispersive Infrared (NDIR) Carbon Dioxide Sensors”
Why Choose a 38R Self-Acting Control Valve?
There are several reasons why a 38R is a great choice in your heating or cooling applications, with the most obvious being that there is no power required. The 38R temperature regulator is a fully self-contained unit, requiring no external power source. This could mean substantial savings over the operation of other types of valves.
Regulation takes place when the sensing bulb is exposed to changes in temperature. The thermal system is charged with a predetermined amount of vapor fill, which, when heated, will cause a bellows within the unit’s actuator housing to expand. As the bellows expands, it compresses a return spring while simultaneously moving the valve stem downward to stroke the valve.
When the process temperature decreases or in the event of thermal system failure, the return spring will move the valve stem upward to the “out” position. Continue reading “Why Choose a 38R Self-Acting Control Valve?”