What to Look for in a Differential Pressure Transmitter

When looking for a differential transmitter and liquid leak detection, one of the things that have to be specified is the minimum voltage that is required. However, take note that if there is a load resistance, this will cause a reduction in the voltage across the pressure transmitter. You will need to determine the voltage drop across the load resistance and subtract this from the voltage that you get from your power source. On the other hand, it is also essential to make sure that the actual voltage applied across the pressure transmitter will not surpass the maximum allowable value to prevent damage to the device. Even a small overvoltage can cause certain parts of the transmitter to overheat and degrade its performance.

When looking for a differential pressure transmitter sensor, it is essential to check the manufacturer's technical data. With regards to the specified voltage, it is important to note that some manufacturers will indicate the voltage for the mains circuit while others will point out the needed voltage across the pressure transmitter itself. Other manufacturers will provide in their product data sheets a load diagram that will specify the allowable region of operation for a certain load and the voltage of the power source. Still another vital factor to look into when choosing your transmitter is the pressure reference. A common configuration is the vented gauge pressure transmitter, which permits the external atmospheric pressure to be applied on the negative side of the sensing diaphragm through vented hole or cable. Thus, the pressure measured is always in reference to the ambient air pressure. One example of a pressure transmitter is the Rosemont transmitter, which has been found to remain stable even after installation for five years.

Read more about a differential pressure transmitter. Visit Pressure Sensors Review.

Article Source: http://EzineArticles.com/?expert=Gavin_Cruise

By Gavin Cruise

Electromagnetic Flow Meters - Mass Flow Meters, Liquid Leak Detection

Have you ever needed to test the flow rate of a fluid, but there was no flow meter installed? At times like that, a portable flow meter is extremely useful. A portable flow meter can still measure the flow rate of a fluid with accuracy, but is portable, so one can move it around and test multiple locations. They are made portable because the transducers small and light enough to hold in one hand. Ultrasonic signals in gas flow meters are used because they are non-invasive, that is they do not touch the fluid being measured. They are created to be able to measure many types of fluids, such as oxygen, steam, or diesel. This article will explain the usefulness of a portable ultrasonic gas flow meter.
Portable ultrasonic gas flow meters are usually light enough for someone to hold in one hand. This allows for easy transportation, and easy measurements of multiple locations. The main reason why they are light weight is because the transducers are made to be as light and small as possible. Even though they are portable, that does not mean that quality is lost in measurement. A portable Mass Flow Meters can be as accurate as it is portable.
All portable flow meters are non-invasive. This is because it would need to work with multiple fluids, otherwise being portable would not do any good. Typically a portable flow meter will use ultrasonic because it does not interfere with most fluids. Ultrasonic is also a very useful because it is easy to produce and to measure with, and it works on simple echolocation or Doppler principles.
Because ultrasonic waves do not interfere with many fluids, it can be used with multiple types of fluids. Examples include oxygen, steam, diesel, or just plain normal or compressed air. As long as the fluid is within the technical specifications, a portable ultrasonic gas flow meter can be used for it.
Portable Electromagnetic Flow Meters are very useful for people who use machinery that use a type of fluid for normal operation. Even if a person forgot to buy a non-portable flow meter, a portable flow meter is a suitable substitute until he or she can get a non-portable one. Most portable flow meters use ultrasonic signals, though some can use electromagnetic signals. Ultrasonic waves typically do not cause interference in the fluid's rate of flow and can provide very accurate readings. A portable ultrasonic flow meter is usually small enough to carry around with one hand, so they are easy to transport as well as use. If you do not have a portable ultrasonic flow meter, and use machinery that uses fluids, then get one today!

Gottlieb Wendehals owns and operates http://www.gasflow-meters.com/ Gasflow Meters Article Source: http://ezinearticles.com/?expert=Gottlieb_Wendehals

By Gottlieb Wendehals