Current Sense / Shunts
Our official sales partner: Shivalik Bimetal Controls Ltd.
Shivalik Bimetal Controls Ltd. specializes in bonding materials through processes such as diffusion bonding, cladding, electron beam bonding, soldering and resistance welding and offers a wide range of products for various industries.
Through this partnership, we can offer our customers access to a wide range of state-of-the-art technologies and products - from current sense resistors (also known as shunt resistors) for efficient energy measurement to customized solutions for industrial applications and consumer electronics.
Through this partnership, we can offer our customers access to a wide range of state-of-the-art technologies and products - from current sense resistors (also known as shunt resistors) for efficient energy measurement to customized solutions for industrial applications and consumer electronics.
Applications of current measuring resistors
Current measuring resistors (also known as shunt resistors ) are essential components for the precise measurement of electrical currents. Due to their low resistance value, they make it possible to determine the current based on the voltage drop according to Ohm's law
These resistors are used in numerous areas, including industry, medical technology and automotive engineering. They are used for current monitoring in batteries, power supply units and motor controls as well as for energy and power monitoring in intelligent measuring systems.
Depending on the area of application, a distinction is made between on-board and off-board current measuring resistors. On-board resistors are integrated directly into electronic systems, while off-board resistors are mounted externally to safely measure higher currents and efficiently dissipate heat.
These resistors are used in numerous areas, including industry, medical technology and automotive engineering. They are used for current monitoring in batteries, power supply units and motor controls as well as for energy and power monitoring in intelligent measuring systems.
Depending on the area of application, a distinction is made between on-board and off-board current measuring resistors. On-board resistors are integrated directly into electronic systems, while off-board resistors are mounted externally to safely measure higher currents and efficiently dissipate heat.
Current measuring resistors directly from the distributor
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- Precise measurement, minimal tolerances
- Customized solutions for every application
- Wide range of applications - current monitoring in electronics and industry
- Reliable - Quality from Rotima & Shivalik
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Function and use of current measuring resistors in measurement technology
A current measuring resistor is a special resistor that is used to precisely measure electrical currents. It works according to a simple principle: when current flows through it, a small voltage drop occurs that is directly proportional to the current. This voltage can be measured and used to determine the current. It is crucial that the resistance is very low in order to keep the energy loss low.
In many applications such as battery management systems, power electronics or industrial control systems, a high-quality current measuring resistor ensures accurate and reliable measurement. Rotima AG offers solutions that are perfectly tailored to your requirements. By using high-quality materials and precise manufacturing techniques, we guarantee exact values and long-term stability.
A current measuring resistor is therefore more than just a component - it is a crucial component for efficient energy monitoring and process control.
In many applications such as battery management systems, power electronics or industrial control systems, a high-quality current measuring resistor ensures accurate and reliable measurement. Rotima AG offers solutions that are perfectly tailored to your requirements. By using high-quality materials and precise manufacturing techniques, we guarantee exact values and long-term stability.
A current measuring resistor is therefore more than just a component - it is a crucial component for efficient energy monitoring and process control.
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Current Sense / Shunts
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Further information on shunts
How can the accuracy of current measurements with shunt resistors be improved?
The accuracy of current measurements with shunt resistors can be optimized by several measures:
- Select precise resistance values - shunts with narrow tolerances minimize measurement errors. Resistors with ±0.1 % or better increase the accuracy.
- Low temperature coefficient of resistance (TCR) - Materials with low TCR prevent resistance changes due to temperature fluctuations and ensure stable measured values.
- Four-wire measurement (Kelvin connection) - Separate measurement and current paths reduce voltage losses on the traces, leading to more accurate results.
- Optimal placement on the board - Short traces and a thermally stable environment reduce interference and resistance changes.
- Use low-noise measurement amplifiers - High-quality differential amplifiers with low offset drift improve signal quality and reduce measurement errors.
- Calibration and temperature compensation - Regular calibration and software corrections compensate for environmental influences and improve measurement accuracy.
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How do pulse loads affect the service life of current measuring resistors?
Pulse loads can have a considerable effect on the service life of current measuring resistors, particularly due to thermal and mechanical loads.
- Heating and material fatigue - High current peaks cause short-term temperature increases in the resistor material. Repeated heating and cooling cycles lead to thermal fatigue, which can change the resistance value in the long term.
- Overload and microstructure damage - Extreme pulse applications can lead to microcracks in the resistor material or at the solder joints. These can change the resistance value in an uncontrolled manner and, in the worst case, lead to failure.
- Electromigration and contact wear - In high-current applications, material migration can occur, which deteriorates the electrical contact. This reduces the long-term stability of the resistor.
- Optimization through proper selection - Resistors with high pulse loading capacity, low temperature coefficient (TCR) and robust construction are better suited for applications with repeated load peaks.
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What role does the temperature coefficient play in current measuring resistors?
The temperature coefficient (TCR) plays a decisive role in the measuring accuracy and long-term stability of current measuring resistors, as their resistance value changes with temperature.
- Influence on measurement accuracy - A high temperature coefficient causes the resistance to change with temperature changes, which leads to measurement errors. This can be particularly problematic in high current applications or environments with strongly fluctuating temperatures.
- Material selection and stability - Resistors made from low-resistance metal alloys such as manganese or tin-silver have an extremely low TCR and remain stable even with temperature fluctuations. This ensures precise and reproducible current measurement.
- Optimization through targeted selection - Applications with high demands on long-term stability and precision require shunts with a low TCR (e.g. ±5 ppm/°C to ±50 ppm/°C). This minimizes deviations and guarantees precise measurement results over long periods of time.
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What are the advantages of current measuring resistors compared to other current measuring methods?
Current sensing resistors offer several key advantages over other current measurement methods, particularly in terms of accuracy, efficiency and cost.
- High measurement accuracy - Shunt resistors enable direct and precise current measurement, as the voltage drop is exactly proportional to the current. Other methods, such as Hall sensors, can be influenced by magnetic fields or temperature fluctuations.
- Low losses and high efficiency - Low resistance values (<1 mΩ) keep energy losses to a minimum, making shunts particularly suitable for high-performance applications. Optical or inductive sensors often have a higher power consumption.
- Cost-effective solution - Compared to current sensors or converters, current sensing resistors are an inexpensive and robust solution that can be easily integrated into existing circuits.
- Wide range of applications - They are suitable for direct and alternating current measurements in a wide range of areas, from battery management systems (BMS) to industrial electronics and power electronics.
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Current measuring resistors from Rotima?
Where can I buy current measuring resistors in Switzerland? - At Rotima AG, you can obtain high-quality current measuring resistors in Switzerland - delivered precisely, reliably and quickly.
Where can I find electronics for renewable energies? - We offer specialized solutions for renewable energy, optimized for maximum efficiency and sustainable performance.
Does Rotima offer electronics for Industry 4.0? - Yes, our range includes modern electronics for Industry 4.0, ideal for smart, networked applications in automation technology.
Can I source industrial electronics in Germany? - Rotima AG supplies reliable electronics solutions for industrial applications in Germany - with the highest quality standards and proven technology.
Does Rotima cooperate with electronic component manufacturers in Switzerland? - Yes, we cooperate with leading manufacturers to offer you high-quality and innovative electronic components.
Where can I find cheap electronic components in Germany? - Our customers benefit from high-quality but cost-effective electronic components that we offer in Germany.
Where can I find electronics for renewable energies? - We offer specialized solutions for renewable energy, optimized for maximum efficiency and sustainable performance.
Does Rotima offer electronics for Industry 4.0? - Yes, our range includes modern electronics for Industry 4.0, ideal for smart, networked applications in automation technology.
Can I source industrial electronics in Germany? - Rotima AG supplies reliable electronics solutions for industrial applications in Germany - with the highest quality standards and proven technology.
Does Rotima cooperate with electronic component manufacturers in Switzerland? - Yes, we cooperate with leading manufacturers to offer you high-quality and innovative electronic components.
Where can I find cheap electronic components in Germany? - Our customers benefit from high-quality but cost-effective electronic components that we offer in Germany.
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