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Current Sensor
Precision,Performance, Price
What is an Current Sensor？
A Current Sensor is a device used to detect and measure the amount of electrical current flowing through a circuit. It converts the physical phenomenon of electrical current into a readable signal, typically a voltage or digital output, that can be used for monitoring or controlling electrical systems.
Current sensors are essential components in industrial automation, renewable energy systems, electric vehicles (EVs), and many other applications. They provide critical data for overcurrent protection, energy management, and system performance monitoring.
There are different types of current sensors, including magnetic flux gate (iFluxgate®) sensors, hall effect sensors, and shunt-based sensors, each suited to specific needs based on the application and environment.
iFluxgate® vs. Hall Effect
In the world of current sensing, two leading technologies dominate: iFluxgate® and Hall Effect. Each has its own strengths, and selecting the right one depends on the specific requirements of your application.
iFluxgate® Technology
iFluxgate® sensors are based on the principle of magnetic flux measurement, providing high-precision current sensing in both AC and DC systems. These sensors are renowned for their accuracy and low offset drift, making them ideal for applications that require high-precision measurement over long periods of time.
- High Precision: Offers superior accuracy, especially in low current measurements.
- Low Offset Drift: Ideal for long-term stability, with minimal signal drift over time.
- AC & DC Measurement: Can detect both alternating current (AC) and direct current (DC), making them versatile in various applications.
- Low Power Consumption: Consumes less power compared to some other technologies, making it efficient for embedded systems.
Hall Effect Technology
Hall Effect sensors work by measuring the magnetic field generated by an electrical current passing through a conductor. These sensors are highly effective for measuring AC and DC currents and are widely used due to their simplicity and cost-effectiveness.
- Non-Contact Measurement: Measures current without direct electrical connection, reducing risk and wear.
- Wide Range: Can measure both AC and DC currents, making them versatile.
- Cost-Effective: Typically more affordable than iFluxgate® sensors while still offering reliable performance.
application
Applications in Detail
Current Sensors play a critical role in energy storage systems, particularly for monitoring the charging and discharging of batteries. By accurately measuring the current flowing into and out of storage units, these sensors help in battery management, ensuring safe and efficient energy storage.
- Battery Health Monitoring
- System Efficiency
- Overcurrent Protection
In industrial automation, current sensors are integral to the monitoring and protection of electrical systems, such as motors, drives, and actuators. They are used to detect any overcurrent conditions, ensuring the protection of sensitive equipment and maintaining smooth operation in automated systems.
- Real-time Monitoring
- Overcurrent Protection and Fault Detection
- Energy Efficiency
In solar power systems, current sensors are essential for ensuring efficient energy production and monitoring the performance of solar panels and inverters. These sensors help track the current generated by the solar panels and provide real-time feedback, which is crucial for system optimization and fault detection.
- Solar Panel Performance Monitoring
- Battery and Inverter Protection
- Efficiency and Fault Detection
application
Applications in Detail
Current Sensors play a critical role in energy storage systems, particularly for monitoring the charging and discharging of batteries. By accurately measuring the current flowing into and out of storage units, these sensors help in battery management, ensuring safe and efficient energy storage.
- Battery Health Monitoring
- System Efficiency
- Overcurrent Protection
In industrial automation, current sensors are integral to the monitoring and protection of electrical systems, such as motors, drives, and actuators. They are used to detect any overcurrent conditions, ensuring the protection of sensitive equipment and maintaining smooth operation in automated systems.
- Real-time Monitoring
- Overcurrent Protection and Fault Detection
- Energy Efficiency
In solar power systems, current sensors are essential for ensuring efficient energy production and monitoring the performance of solar panels and inverters. These sensors help track the current generated by the solar panels and provide real-time feedback, which is crucial for system optimization and fault detection.
- Solar Panel Performance Monitoring
- Battery and Inverter Protection
- Efficiency and Fault Detection
application
Applications in Detail
Current Sensors play a critical role in energy storage systems, particularly for monitoring the charging and discharging of batteries. By accurately measuring the current flowing into and out of storage units, these sensors help in battery management, ensuring safe and efficient energy storage.
- Battery Health Monitoring
- System Efficiency
- Overcurrent Protection
In industrial automation, current sensors are integral to the monitoring and protection of electrical systems, such as motors, drives, and actuators. They are used to detect any overcurrent conditions, ensuring the protection of sensitive equipment and maintaining smooth operation in automated systems.
- Real-time Monitoring
- Overcurrent Protection and Fault Detection
- Energy Efficiency
In solar power systems, current sensors are essential for ensuring efficient energy production and monitoring the performance of solar panels and inverters. These sensors help track the current generated by the solar panels and provide real-time feedback, which is crucial for system optimization and fault detection.
- Solar Panel Performance Monitoring
- Battery and Inverter Protection
- Efficiency and Fault Detection
Technical Specifications
| Series | Model | Package style | Certification/ | Rated current [A] | Maximum | Supply voltage (V) | Frequency bandwidth | Operating | Linearity (25℃) | Accuracy % (25℃) | Application scenario |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Flux Gate Current Sensor | MCSA-6S/P |  | CE/UL | 6A | 20A | +5V | 200kHz | -40℃~+105℃ | 0.1% | 0.7% | Photovoltaic inverter/industrial equipment |
| MCSA-25S/P |  | CE/UL | 25A | 85A | +5V | 200kHz | -40℃~+105℃ | 0.1% | 0.7% | Photovoltaic inverter/industrial equipment | |
| MCSA-50S/P | | CE/UL | 50A | 150A | +5V | 200kHz | -40℃~+105℃ | 0.1% | 0.7% | Photovoltaic inverter/industrial equipment | |
| MCSB-100S/P |  | CE/UL | 100A | 200A | +5V | 100kHz | -40℃~+85℃ | 0.1% | 0.7% | Photovoltaic inverter/industrial equipment | |
| MCSC-200S/NP-D |  | CE/UL | 200A | 370A | +5V | 100kHz | -40℃~+85℃ | 0.1% | 0.5% | Photovoltaic inverter/industrial equipment | |
| MCSC-200S/P |  | CE/UL | 200A | 450A | +5V | 200kHz | -40℃~+85℃ | 0.1% | 0.7% | Photovoltaic inverter/industrial equipment | |
| MCSE-75S/P3 |  | CE/UL | 75A | 180A | +5V | 300kHz | -40℃~+105℃ | 0.1% | 0.8% | Photovoltaic inverter/industrial equipment | |
| MCSE-50S/P2 |  | CE/UL | 50A | 150A | +5V | 300kHz | -40℃~+105℃ | 0.1% | 0.8% | Photovoltaic inverter/industrial equipment | |
| MCSE-25S/P1 |  | CE/UL | 25A | 85A | +5V | 300kHz | -40℃~+105℃ | 0.1% | 0.8% | Photovoltaic inverter/industrial equipment | |
| MCSE-25S/P2 | | CE/UL | 25A | 85A | +5V | 300kHz | -40℃~+105℃ | 0.1% | 0.8% | Photovoltaic inverter/industrial equipment | |
| MCSE-50S/P1 | | CE/UL | 50A | 150A | +5V | 300kHz | -40℃~+105℃ | 0.1% | 0.8% | Photovoltaic inverter/industrial equipment | |
| MCSC-200S/NP |  | CE/UL | 200A | 450A | +5V | 200kHz | -40℃~+85℃ | 0.1% | 0.7% | Photovoltaic inverter/industrial equipment |
| Series | Model | Package style | Rated current [A] | Maximum | Supply voltage (V) | Frequency bandwidth | Operating | Linearity (25℃) | Accuracy % (25℃) | Application |
|---|---|---|---|---|---|---|---|---|---|---|
| Hall Closed Loop Current Sensor | MCSC-100 S/NP-H | | 100A | 300A | +5V | 200kHz | -40℃~+85℃ | 0.2% | 0.8% | Photovoltaic inverter/industrial equipment |
| MCSC-150 S/NP-H | | 150A | 450A | +5V | 200kHz | -40℃~+85℃ | 0.2% | 0.8% | Photovoltaic inverter/industrial equipment | |
| MCSC-200 S/NP-H | | 200A | 600A | +5V | 200kHz | -40℃~+85℃ | 0.2% | 0.8% | Photovoltaic inverter/industrial equipment | |
| MCSC-250 S/NP-H | | 250A | 600A | +5V | 200kHz | -40℃~+85℃ | 0.2% | 0.8% | Photovoltaic inverter/industrial equipment | |
| MCSC-300 S/NP-H | | 300A | 600A | +5V | 200kHz | -40℃~+85℃ | 0.2% | 0.8% | Photovoltaic inverter/industrial equipment | |
| MCSC-100 S/P-H |  | 100A | 300A | +5V | 200kHz | -40℃~+85℃ | 0.2% | 0.8% | Photovoltaic inverter/industrial equipment | |
| MCSC-150 S/P-H | | 150A | 450A | +5V | 200kHz | -40℃~+85℃ | 0.2% | 0.8% | Photovoltaic inverter/industrial equipment | |
| MCSC-200 S/P-H | | 200A | 450A | +5V | 200kHz | -40℃~+85℃ | 0.2% | 0.8% | Photovoltaic inverter/industrial equipment | |
| MCSC-250 S/P-H | | 250A | 450A | +5V | 200kHz | -40℃~+85℃ | 0.2% | 0.8% | Photovoltaic inverter/industrial equipment | |
| MCSC-300 S/P-H | | 300A | 450A | +5V | 200kHz | -40℃~+85℃ | 0.2% | 0.8% | Photovoltaic inverter/industrial equipment |
| Series | Model | Package style | Rated current [A] | Maximum | Supply voltage (V) | Frequency bandwidth | Operating | Linearity (25℃) | Accuracy % (25℃) | Application |
|---|---|---|---|---|---|---|---|---|---|---|
| Hall Open Loop Current Sensor | MG20RAG |  | 20A | 50A | +5V | 200kHz | -40℃~+105℃ | 0.5% | 1% | Combiner box/inverter |
| MG32RAG |  | 32A | 80A | +5V | 200kHz | -40℃~+105℃ | 0.5% | 1% | Combiner box/inverter | |
| MG50RAG | | 50A | 125A | +5V | 200kHz | -40℃~+105℃ | 0.5% | 1% | Combiner box/inverter | |
| MG80RAG |  | 80A | 200A | +5V | 150kHz | -40℃~+105℃ | 0.5% | 1% | Combiner box/inverter | |
| MG100RAG | | 100A | 250A | +5V | 150kHz | -40℃~+105℃ | 0.5% | 1% | Combiner box/inverter | |
| MG120RAG | | 120A | 300A | +5V | 150kHz | -40℃~+105℃ | 0.5% | 1% | Combiner box/inverter | |
| MG150RAG | | 150A | 375A | +5V | 150kHz | -40℃~+105℃ | 0.5% | 1% | Combiner box/inverter | |
| MG180RAG | | 180A | 450A | +5V | 150kHz | -40℃~+105℃ | 0.5% | 1.5% | Combiner box/inverter | |
| MC20 |  | 10A | 20A | +5V | 80kHz | -40℃~+85℃ | 0.4% | 1% | Combiner box/industrial equipment | |
| MC25 |  | 12.5A | 25A | +5V | 80kHz | -40℃~+85℃ | 0.4% | 1% | Combiner box/industrial equipment | |
| MC45 | | 22.5A | 45A | +5V | 80kHz | -40℃~+85℃ | 0.4% | 1% | Combiner box/industrial equipment | |
| ME2-20 |  | 10A | 20A | +5V | 80kHz | -40℃~+85℃ | 0.4% | 1% | Combiner box/industrial equipment | |
| ME2-25 |  | 12.5A | 25A | +5V | 80kHz | -40℃~+85℃ | 0.4% | 1% | Combiner box/industrial equipment | |
| ME2-40 | | 20A | 40A | +5V | 80kHz | -40℃~+85℃ | 0.4% | 1% | Combiner box/industrial equipment |
How to Choose Your Sensor？
Determine the Application Type
The first step in choosing a current sensor is understanding your system’s application. Different applications require different sensor characteristics based on accuracy, response time, and current range. Magtron sensors are tailored for various industries, offering specialized features that meet unique requirements.
Industrial Automation: For motor control and actuator monitoring, where high precision is needed for performance optimization, select closed-loop fluxgate sensors for high-precision current measurements.
Electric Vehicles (EVs): In EV applications, choose Hall Effect sensors or iFluxgate® sensors for battery management and charging systems, where accurate DC current measurements are vital.
Energy Storage: For battery charge/discharge cycles, select sensors with high accuracy and low offset drift to ensure efficient battery health monitoring.
Photovoltaic Systems: Choose sensors for solar power systems that support both AC and DC measurements, ensuring you monitor solar panel output and inverter performance accurately.
Each application has specific requirements that dictate the type of current sensor you need. For example, EVs require sensors capable of measuring DC current, while industrial systems may require sensors with higher accuracy for motor control and automation.
Select the Appropriate Measurement Range
The measurement range of the sensor is critical for ensuring that the sensor can handle the current expected in your system. The sensor must be able to measure the peak current while staying within its operational range.
Common Measurement Ranges:
For residential or light commercial systems, sensors in the range of 10A to 100A are often sufficient.
For industrial applications, current sensors may be required in ranges from 100A to 1500A, depending on the size and power requirements of the machinery.
Overcurrent Protection:
Ensure that the sensor can detect and respond to overcurrent situations, which could lead to system failures or damage to components.
The right sensor for your application should have a current range that not only covers typical operating conditions but also accounts for possible peak currents or fault conditions.
Accuracy and Precision
The accuracy and precision of your current sensor directly impact the quality of your measurements. Magtron’s sensors provide a wide range of accuracy levels, with some offering sub-1% accuracy, essential for applications that demand high precision.
High-Precision Requirements:
For applications like battery management systems (BMS) in electric vehicles, high-precision sensors like iFluxgate® provide very accurate readings and are able to detect small fluctuations in current that can affect battery performance.General Accuracy:
For more general applications like solar systems or industrial automation, Hall Effect sensors offer a balance of accuracy and cost-effectiveness, ensuring sufficient precision without the need for high-end technology.
Selecting the right accuracy ensures that your measurements are reliable and stable, providing accurate feedback for control and monitoring systems.
Choose the Right Sensor Technology
Magtron offers multiple sensor technologies, each suited to specific needs based on measurement accuracy, range, and application requirements. Understanding the strengths of each technology is key to making the right choice.
iFluxgate® Sensors:
Ideal for high-precision applications requiring low drift and stable performance. These sensors can measure both AC and DC currents, making them suitable for applications like industrial motor control, solar inverters, and EV battery monitoring.Hall Effect Sensors:
Hall Effect sensors are versatile and widely used for both AC and DC current measurements. These sensors are typically used in energy storage systems, solar panels, and electric vehicle charging. They are more cost-effective than iFluxgate® sensors and offer sufficient accuracy for many commercial applications.Shunt-based Sensors:
These sensors measure the voltage drop across a known resistor to calculate current. While they are very cost-effective, they require precise calibration and are typically used for low-current applications or energy metering.
Consider Environmental Conditions
The environmental conditions in which the current sensor operates are crucial to its performance and longevity. Ensure that the selected sensor can handle the environmental factors such as temperature, humidity, and potential exposure to contaminants.
Operating Temperature:
Choose sensors with a suitable temperature range to handle the extremes of your system’s environment. Many Magtron sensors are rated for -40°C to 85°C, which is sufficient for most industrial and outdoor applications.Protection Against Moisture and Dust:
If the sensor will be exposed to harsh environments, such as outdoor installations or industrial settings, choose sensors with higher IP ratings, like IP65 or IP67, to ensure protection from dust and water ingress.
Pre-Certified Solution
Choosing pre-certified current sensors offers numerous benefits, particularly in terms of safety compliance and reducing time-to-market. Magtron’s current sensors come with pre-calibrated certifications, ensuring they meet international standards such as IEC 61851 for EV charging, UL 2231-2 for residual current protection, and CE for compliance within the European market.
Global Certification:
Pre-certified sensors save you the time and resources required to test and certify your product. These sensors are already tested to meet global safety standards, ensuring they will work seamlessly in your application without any additional compliance hurdles.Faster Time-to-Market:
By choosing a pre-certified sensor, you eliminate the need for lengthy safety approval processes, which significantly reduces the time required to bring your product to market. This is especially beneficial for applications such as electric vehicle charging stations, solar inverters, or energy storage systems, where time-sensitive regulations and market demands exist.Trust and Reliability:
Using pre-certified solutions ensures you are working with a reliable, industry-tested product. These certifications guarantee that your sensor has undergone rigorous testing and complies with all relevant safety, electromagnetic compatibility (EMC), and environmental standards.Simplified Approval Process:
For customers or end users looking to integrate your product, the pre-certification of the current sensors simplifies their approval process as well, ensuring a smoother deployment. This is particularly useful when you are dealing with large-scale installations, such as in industrial or grid systems.
Integration and Size
Selecting the right sensor also involves considering the integration and physical size of the sensor to fit into your system. Depending on your application, the size and installation method may vary, and Magtron provides a wide range of form factors to accommodate your needs.
Space Constraints:
Many modern applications, especially embedded systems in consumer electronics, smart meters, and electric vehicles, require compact designs. Magtron offers miniature sensors that can easily fit into tight spaces without compromising performance. These compact designs are especially useful for applications that require small footprint or low-profile mounting.Mounting Flexibility:
Magtron’s current sensors are designed for easy integration into existing systems. Sensors come with different mounting options, including PCB mounting, DIN rail mounting, and screw-mounted configurations. Depending on your installation environment, you can select the appropriate mounting type:PCB Mounting: Ideal for embedded systems or applications that require high-density circuits.
DIN Rail Mounting: Common in industrial applications and control panels, where modules need to be securely installed within electrical cabinets.
Screw Mounting: Useful for systems that require flexible or custom installations, allowing for quick and easy integration into a variety of systems.
Modular Design for Future Expansion:
When designing for future scalability, it’s important to select sensors that can be easily expanded or upgraded. Magtron’s sensors offer modular designs that allow for easy replacement or integration with other components. This flexibility is ideal for energy management systems, smart grids, and other large-scale operations that might require future upgrades or modifications.Environmental Suitability:
The size and design of the sensor also need to suit the environmental conditions where it will be installed. For example, some systems might require IP65 or IP67 rated sensors to be fully dustproof and waterproof for outdoor or harsh conditions. Ensure the selected sensor is equipped to handle the physical demands of the application, such as exposure to extreme temperatures or moisture.Customizability:
If your application has specific size or mounting requirements, some of Magtron’s sensors offer customizable features to meet your unique needs. Whether it’s adjusting the sensor’s output range, voltage levels, or other parameters, Magtron offers solutions that are adaptable for a variety of use cases.
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Quality & Certifications
Magtron ensures that all our Current Sensors meet the highest quality standards for reliable and efficient performance.
Our Current Sensors are manufactured in compliance with ISO 9001 and IATF 16949, ensuring consistent quality control throughout production.
We provide CE, UL, and RoHS certifications, guaranteeing our sensors meet global safety, electromagnetic compatibility (EMC), and environmental standards.
Our products comply with IEC 62752 for EV charging, IEC 62955 for DC leakage detection, and UL 2231-2 for residual current protection.
These certifications reflect our commitment to delivering high-quality, safe, and reliable products for a wide range of applications.
Why Partner with Magtron?
One-Stop Shop
We provide a comprehensive range of current sensing technologies, enabling us to offer tailored solutions for diverse applications. This gives you the flexibility to choose the ideal sensor for your system, whether it’s for industrial automation, electric vehicles, or renewable energy.
Technology Expertise
With years of experience in the field, Magtron’s engineering team possesses deep knowledge of the strengths and weaknesses of each sensing technology. We can offer expert advice to help you select the best sensor for your application, taking into account factors like accuracy, response time, and cost.
Simplified Integration
By partnering with Magtron, you gain access to a reliable, proven technology portfolio that can be easily integrated into your designs. Our sensors are pre-calibrated and meet international standards, allowing you to reduce design complexity, accelerate time-to-market, and ensure compliance with global safety regulations.
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Most Popular Questions
iFluxgate® offers the highest accuracy and lowest temperature drift, ideal for precision control. Closed-Loop Hall provides a good balance of performance and cost with wide bandwidth. Open-Loop Hall is the most cost-effective solution, perfect for monitoring applications where high accuracy is not the primary concern.
Consider your primary requirement: for ultimate precision, choose iFluxgate®. For general-purpose industrial control (e.g., VFDs), choose Closed-Loop Hall. For cost-sensitive monitoring (e.g., battery current sensing), choose Open-Loop Hall. Our sales team can provide expert advice.
We offer various output types, including analog voltage (e.g., 0-5V, ±10V), analog current (e.g., 4-20mA), and digital formats like SPI or SENT for specific automotive-grade sensors.
Yes, we have a range of sensors designed for high-current applications, commonly found in energy storage systems, industrial welding, and railway traction. Please check our product catalog or contact us with your specific requirements.
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