pressure transmitters

What affects the accuracy of pressure transmitters? 7 factors that can reduce the precision of measurements

The accuracy of pressure sensors is affected by many parameters that can reduce the precision of measurements in industrial processes. These measurement errors can result in compromised product quality on production lines. What does this mean for you? More waste, the need for additional quality checks and potential downtime, all of which generate additional costs and reduce production efficiency. It's important that you know these variables and take action to reduce them. Understanding what specifically affects the precision of your measurements allows you to better manage your production process and choose the right technologies and equipment to minimize the impact of these factors. But what exactly is causing your measurements to be inaccurate? What steps do you need to take to reduce their impact on pressure transducers? Find the answers to these questions in our blog post. Read on and avoid costly mistakes!

1. Ambient temperature and fluid temperature

Why are ambient temperature and fluid temperature key factors affecting the accuracy of pressure sensors? Each sensor has its own specific temperature tolerances, and temperature changes can lead to measurement errors. As the ambient or process temperature increases, the accuracy of the sensor can decrease. Therefore, it is important when selecting a pressure sensor to make sure that its temperature range is suitable for the conditions in which it will be used.

Some pressure sensors are equipped with temperature compensation technology that allows them to maintain high accuracy even under varying temperature conditions. When looking for a pressure sensor supplier, it is worth looking at devices that offer this feature, as they provide more reliable and precise measurements.

Pressure transmitter for high or variable temperature media JUMO dTRANS p31 (402050)

Pressure transmitter for high or variable temperature media JUMO dTRANS p31 (402050)

2. Static Pressure

This section pertains to differential pressure transmitters. Unlike a relative pressure transmitter, which measures pressure relative to the atmosphere, and an absolute pressure transmitter, which determines pressure relative to a vacuum, a differential pressure transmitter operates by measuring the pressure difference between two points.

Static pressure refers to the pressure within a pipe or process. For differential pressure sensors, this pressure is applied to both ports of the sensor.

Impact of Static Pressure on Measurement Accuracy

When both ports of the differential pressure sensor are exposed to atmospheric pressure, the measured pressure is zero. Theoretically, if higher pressure is applied to both ports, the measured pressure should also be zero. However, in practice, static pressure can affect the accuracy of differential pressure sensors.

Line pressure can negatively impact measurement accuracy and repeatability. It can shift the zero point of the transmitter and alter its measurement range. On-site calibration of sensors can help mitigate the influence of static pressure on the measurement process.

Static Pressure Compensation

JUMO differential pressure sensors are designed with static pressure compensation during manufacturing to avoid errors that could affect measurement accuracy. When selecting a supplier for differential pressure sensors, it is important to seek devices with static pressure compensation features.

Maximum Static Pressure

When choosing a differential pressure transmitter, it is important to consider the maximum allowable static pressure that should not be exceeded. Adhering to this limit is crucial for ensuring accurate and reliable measurements.

MIDAS series relative pressure transmitters (401010)

MIDAS series relative pressure transmitters (401010)

3. Long-term stability of pressure transmitters

The long-term stability of pressure transmitters has a key impact on the accuracy of measurements over the long term. Over time, sensors can experience zero point drift and other changes that affect the precision of readings. To compensate for these changes, regular calibration (calibration) is essential. At JUMO, we offer comprehensive calibration services for pressure transmitters, allowing them to maintain their high accuracy for many years. Our pressure transmitters are designed for long-term stability, maintaining precision of ±0.1% for five years. This ensures reliable and accurate measurements, reducing costs associated with frequent calibration and maintenance

4. Mounting position of the pressure transducer

Does the mounting position of a pressure transducer affect the accuracy of measurements? Yes, because even if the transmitter has been precisely calibrated at the factory, mounting it in a different position can lead to small deviations in the readings. This is due to the effects of gravity on the medium filling the sensor and on the measuring elements themselves. To minimize these deviations, it is recommended that the transmitter be calibrated after it is installed in its target position. We understand the importance of precise installation, so our pressure transmitters are equipped with features for easy on-site calibration to correct any errors due to installation position and ensure accurate and reliable measurements.

Pressure transmitter

Mounting position of pressure transmitter affects measurement accuracy

5. Impact of industrial equipment vibrations

Did you know that vibration of industrial equipment can significantly affect the accuracy of pressure transducer measurements? They can cause micro-movement of the measuring elements in the transmitters, leading to interference and erroneous readings. In addition, prolonged exposure to strong vibration can accelerate the wear and degradation of these measuring devices, shortening their service life. JUMO pressure transmitters, especially those such as JUMO MIDAS S19 R for railroads and JUMO CANtrans p with CANopen output signal, are designed for use in harsh industrial environments and have high vibration and shock resistance.

Pressure transmitter for rail vehicles JUMO MIDAS S19 R with high vibration and shock resistance (401008)

6. Pressure transducer supply voltage

The supply voltage of a pressure transducer has a direct impact on the accuracy of its measurements. An unstable supply voltage can cause fluctuations in pressure readings, which leads to erroneous results and can disrupt industrial processes. Voltage that is too low can limit the transmitter's ability to operate properly, while surges can damage the device.

We make sure that our pressure transmitters are designed to operate over a wide range of supply voltages to minimize the risk of measurement errors caused by an unstable power supply. Our pressure transmitters are designed to operate reliably and accurately, providing stable measurement results even in the event of voltage fluctuations. This ensures not only accurate readings, but also longer equipment life and less risk of failure in industrial processes.

7. Calibration of pressure transmitters

Regular calibration of pressure transducers is key to maintaining their high accuracy. Over time, transmitters can experience drift or changes in characteristics, leading to erroneous pressure readings. These changes can result from natural wear and tear on materials, the effects of environmental conditions or aging components. Without proper and regular calibration, even the most accurate transmitters can begin to provide unreliable data, which can negatively affect production processes and the quality of final products. We offer professional calibration services to ensure that our pressure transmitters remain accurate and reliable throughout their lifetime. With regular calibration, any deviations can be detected and corrected early, ensuring continued accuracy and compliance with technical requirements.

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About the author

My name is Ewelina Szmit and I have been working in content marketing for several years, combining my professional skills with my passion for writing. I am convinced that even the most technical topics can be presented in an interesting and accessible way for everyone. Outside of work, I unleash my creativity by creating newspaper collages. I like to spend my free time being active, walking my dog or running.

Emil Szmit


Ewelina Szmit - Content specialist +48 71 339 32 94 +48 71 339 32 94

Katarzyna Tracz

Technical specialist

Katarzyna Tracz - Inside Sales Engineer +48 71 339 32 86 +48 71 339 32 86


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