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Setra Blog

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Jan 9, 2017 5:48:00 AM

How To Measure Velocity And Flow

In HVAC/R applications it is helpful to understand the methods used to determine air velocity. Air velocity (distance traveled per unit of time) is most often expressed in feet per minute (FPM).  Multiplying air velocity by the area of a duct allows you to determine the air volume flowing past a point in the duct per unit of time. Volume flow is generally measured in cubic feet per minute (CFM).

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Jan 5, 2017 7:02:00 AM

What is the difference between Unidirectional vs. Bidirectional Differential Pressure Ranges?

Nowadays, there are many applications that require positive and negative differential pressures between a reference room and a room of concern. Isolation rooms, respirators, ventilation and air exhaust systems, overshooting and shooting a given liquid level inhalation, and exhalation setups, are a few applications where these pressures are monitored. It is important to understand the difference between unidirectional and bidirectional differential pressure transducers to make sure you choose the best unit for your application.

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Jan 3, 2017 6:50:00 AM

How to Troubleshoot a Pressure Transducer

Pressure transducers today are more rugged and reliable than ever. Made of stainless steel construction, they provide abundant overpressure protection, improved total error band, and offer negligible orientation and vibration effects. They are ideal for long-term use even in harsh environments of extreme temperature, humidity, and vibration.

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Dec 30, 2016 7:03:00 AM

Happy New Year from Setra Systems

From all of us here at Setra, we wish you a very happy New Year!  We hope you have a wonderful time ringing in the new year with family and friends!

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Dec 29, 2016 7:13:00 AM

Can A Room Pressure Monitor Help Me Save Energy?

Monitoring and controlling room pressure in laboratory and healthcare settings can do more than just ensure directional airflow (positive or negative pressure rooms). Proper room pressure also contributes to saving energy. Overpressure or under-pressure scenarios mean that airflow, or even temperature control, are not optimal.

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Dec 26, 2016 6:16:00 AM

Why is Pressure Sensor Accuracy Important?

The accuracy of differential pressure transducers has greatly improved to provide better solutions for demanding applications. This article discusses why accuracy is an important consideration when selecting a pressure transducer for low-differential, critical pressure applications.

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Dec 22, 2016 5:30:00 AM

Happy Holidays from Setra Systems

From all of us here at Setra, we wish you a very happy holiday!  We hope you enjoy the time wtih your family and friends!

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Dec 19, 2016 5:41:00 AM

Energy Savings Strategies For Operating Rooms

Operating Rooms consume a great deal of energy, considering the high airflow requirements needed, bright lighting, and significant plug load from patient care equipment. There are, however, strategies to conserve energy and still meet the stringent safety requirements of maintaining positive room pressure. Two conditions need to be met to enable OR energy savings. The first is a method to trigger occupied and unoccupied states. And the second is to act on that state change to setback both temperature and airflow.

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Dec 15, 2016 5:54:00 AM

What is overpressure and how can it be prevented?

Can’t handle the pressure?

Can you believe that pressure transducers are not always able to handle high pressure? Overpressure, or proof pressure, is a major concern for engineers and OEM designers when assembling machinery and selecting a pressure transducer. Overpressure refers to the maximum pressure value a transducer can withstand without affecting performance; it can also refer to a situation where the pressure value exceeds the limits. Although it is not ideal, pressure transducers can withstand occasional pressures up to their overpressure rating, eventually returning to their natural state. However, pressures that reach burst pressure, the maximum pressure that may be applied to the positive pressure port without physically damaging the internal sensing component, can rupture the diaphragm and cause leakage. Pressures above overpressure but below burst pressure can result in permanent diaphragm deformation, causing an output shift affecting operational performance or accuracy readings.

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Dec 8, 2016 5:47:00 AM

Explosion Proof & Intrinsically Safe Defined

Below are terms that are associated with use of transducers and electrical equipment in areas which are defined as hazardous by national rating agencies.

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