An indicator which signals the difference in pressure between any two points of a system of a component. It is very important to use such indicators with a signal output for external monitoring for each filter element in the compressed air system – whether it is the compressor suction filter, its oil filter or separator, or the line filters in the line after the compressor. This is necessary to know in advance when to replace the filter inserts, because replacing them too late can result in compressor failure or a significant increase in energy consumption or contamination of the compressed air network.
