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