Application Note

Industrial Controls

Industrial ControlDesigners of pressure sensing equipment are now turning to PPTC Resettable Fuses to help protect the control electronics of their sensors. PPTC Resettable Fuses are low-resistance, resettable overcurrent protectors which may be placed in series with the input and output lines of a pressure sensor to protect the electronics. This is especially important for sensors which need to work in gaseous environments and must be explosion protected.

Many of the more advanced pressure sensors integrate complex combinations of resistors and data processing components to digitally compensate for the non-linearity and temperature dependence of the membrane used to sense pressure. For sensors which must operate in a gaseous environment, it must be ensured that the sense circuit components do not over-heat as a result of a short circuit. Multifuse® Resettable Fuses can be used to reduce potentially damaging overcurrents to safe levels, preventing such component overheating situations.

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