In the design of CT scanners, MRI systems, patient monitoring equipment, and portable medical devices, current measurement accuracy directly impacts diagnostic reliability, device safety, and battery life.
Traditional current-sensing technologies-including current transformers and Hall-effect sensors-often exhibit significant limitations in medical applications. Common challenges include saturation under high-current conditions, difficult installation, relatively high power consumption, and susceptibility to external magnetic fields. These shortcomings can contribute to EMC compliance failures, reduced battery runtime, and even measurement errors that may affect diagnostic accuracy.
A Rogowski Coil Current Sensor is a flexible, open-loop current sensor that contains no magnetic core. Consequently, it is immune to magnetic saturation, can be installed without disconnecting conductors, consumes no system power, and offers excellent immunity to external magnetic-field interference.
Rogowski coils vs traditional solutions
| Design Challenge |
Rogowski Coil Current Sensor |
|---|---|
| High-current saturation | Coreless design with a linear measurement range from 1 A to 100 kA, eliminating saturation risk |
| Difficult installation | Flexible split-core structure allows installation without disconnecting cables |
| Low-power requirements | Passive sensing technology consumes no system power, making it ideal for portable devices |
| External magnetic-field interference | Insensitive to external magnetic fields and suitable for operation in strong magnetic environments such as MRI systems |
Key Medical Applications
Patient Monitoring Systems(ECG monitors Patient monitors Ventilators)
Requirements
- Continuous long-term operation
- High reliability without signal interruption caused by sensor failures
- Low power consumption to minimize heat generation
Rogowski Coil Advantages
- No open-circuit risk associated with conventional current transformers
High operational reliability
- Zero power consumption, reducing thermal management requirements
Portable Medical Devices(Insulin pumps, Defibrillators Portable, diagnostic instruments)
Requirements
- Compact size
- Lightweight construction
- Extended battery life
Rogowski Coil Advantages
- Coil weight of only a few grams
- Flexible structure that can conform to confined spaces
- No external power supply required, helping maximize battery operating time
Advanced Medical Imaging Systems(CT scanners,MRI systems,X-ray equipment)
Requirements
- Measurement of high-current pulses ranging from tens to thousands of amperes
- Reliable operation in environments with strong magnetic fields
Rogowski Coil Advantages
- Coreless design eliminates saturation effects
- Insensitivity to static external magnetic fields
- Reliable operation inside MRI facilities and other high-field environments
Why Choose Shinhom Rogowski Coils?
Shinhom provides comprehensive Rogowski coil design, manufacturing, and integration services optimized specifically for medical and high-reliability applications.
Flexible Coil Configurations
- Coil diameters from 10 mm to 300 mm
- Fully flexible construction for easy installation around conductors of various sizes
Integrated Integrator Options
- Available with:
- DIN-rail mounting modules
- Panel-mounted meter configurations
This eliminates the need for customers to design signal-conditioning circuits independently.
Multiple Output Options
- Voltage output: 0–5 V or 0–10 V
- Current output: 4–20 mA
- Direct RJ45 network connection
Typical Electrical Specifications
| Parameter | Specification |
| Accuracy | ±0.5% of rated range |
| Dynamic Range | 1 A – 100 kA |
| Frequency Response | 0.5 Hz – 1 MHz |
| Operating Temperature | -40°C to +85°C |
| Insulation Voltage | >3 kV (between coil and primary conductor) |
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