Pressure transmitters

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Pressure transducer

Pressure transmitters are essential components in technical systems that perform a variety of direct and indirect tasks. Their main purpose is to convert pressure into an electrical output signal that can be recorded and evaluated in both analog and digital form. This signal is processed by other components in the system.

Tasks and function of pressure transmitters

Pressure transmitters, which you will find at FILCOM in various designs, are used in many sectors, including the automotive and aviation industries as well as in pump systems and in the HVAC segment. Pressure measurements are critical in these applications to monitor the integrity of equipment and control other functions according to pressure.

The pressure transmitter uses a pressure-sensitive element to detect changes in pressure. These are often diaphragms that deform when pressure is applied. This deformation interacts with a built-in transducer element that converts the changes into an electrical signal. The signal indicates both increases and decreases in pressure. The intensity of the pressure changes is measured by the transducer element and the pressure-sensitive element.

A continuous power supply is required to generate the electrical signal correctly.

Differences between pressure transmitters

Pressure transmitters are available in different designs, depending on the measurement technology used. Their correct function depends on the adaptation to the specific system and the media used. Possible media include water, gases, compressed air, hydraulic oil and gasoline. Temperature and pressure limits must also be taken into account when selecting, as these factors influence the choice of seal and housing material.

Other important aspects are the reproducibility of the results and the hysteresis. The latter is important if the pressure rises or falls repeatedly. Reproducibility describes the ability of the device to deliver consistent results at identical pressure. High-quality pressure transmitters normally demonstrate reproducibility with a deviation of around 0.05 % to 0.5 %.