RenAn Precision Technology (HaiNan) Co., Ltd

RAPT Series High Precision Current Sensor

In medical equipment (MRI, Heavy Ion Accelerator), power analyzing, electrical calibration, and power metering industries, high precision current sensor is critical to secure the high performance of the equipment.

Thanks to the Multi point zero flux gate technology and close-looped excitation control technology, RenAn high performance current transducer products have high accuracy, linearity & stability, and low temperature drift and zero drift features, and are providing services to our customers with the top performance and effective cost.

Key Features of RAPT High Precision Current Sensor

Top Accuracy

Up to 1ppm, and 10ppm, 20ppm & 50ppm products available.

Low Zero Drift

Zero Drift: 2ppm

AC / DC Measurement

Can measure AC, DC, and Pulse currents.

Low Temperature Drift

Temperature Drift: 1ppm/ 10 ℃

Full Scale Accuracy

0.01% accuracy achievable from 1A to 1000A, leading in the industry.

Self Protection Integrated

Can start with load; Overload protection & auto-recovery; Leading in the industry

Catagories of RenAn High Precision Current Sensor

RenAn high precision fluxgate current sensor products were developed on the basis of Multi-Point Zero Flux Gate technology, which can be applied for both AC and DC current measurement application, with analogical current, digital signal via RS232/485 & 0-10V voltage output options available. All RenAn high precision current transducer / sensor products are CE EMC & RoHS compliant.

RAPT series high precision current sensor , which was originally developed, then RADT series digital high precision transducer the signal of RAPT can be transmitted kilometers. RAPT-S was developed for high current measurement up to 20,000A. 

Measuring range: from 100A to 1000A
Output signal: analogical current output
Accuracy: max 10ppm
Linearity: max 2ppm;
Time stability: 0.2ppm/month;
Temperature stability: 0.1ppm/K;
Frequency Bandwidth (-3dB): 300kHz;

Measuring range: from 1000A to 5000A
Output signal: analogical current output
Accuracy: 10ppm (Parts Per Million)
Linearity: max 2ppm;
Time stability: 0.5ppm/month;
Temperature stability: 0.5ppm/K;
Frequency Bandwidth (-3dB): 500kHz;
Dynamic response time: di/dt=1.5V/us;

Measuring range: from 1000A to 25000A
Output signal: analogical current output
Accuracy: 10ppm (Parts Per Million)
Linearity: max 2ppm;
Time stability: 0.5ppm/month;
Temperature stability: 0.5ppm/K;
Frequency Bandwidth (-3dB): 500kHz;
Dynamic response time: di/dt=1.5V/us;

Typical Applications of RAPT High Precision Current Transducer

RAPT high precision current sensor & MRI

In the MRI system, the gradient amplifier unit refers to all circuit units related to the gradient magnetic field.

Its function is that the system provides linearity that meets the requirements and can quickly switch the gradient field to determine the slice position and imaging slice degree; the linearity of the gradient coil is an index to measure the stability of the gradient field. The better the linearity, the more accurate the gradient field, and the better the image quality. The current linearity inside the gradient coil highly depends on the current controller and current measurement which is done by high precision current transducer.

RAPT series high precision fluxgate current sensor have been integrated into various electrical testing benches for AC or DC current measurement purpose, such as convertor/invertor and transformer testing benches.

RAPT output high precision current transducer are compatible with most power analyzers, such as:

YOKOGAWA: WT3000 & WT1800 series power analyzer;
Newtons4th: PPA3500 series;
HIOKI: PW3390/PW6001 series;
Tektronix: PA4000 series;
Keysight Integravision: PA2200 series;
Fluke: Norma 4000/5000 series;
GMC: LMG450/610/640/670;
ZLG: PA series;

RAPT high precision current transducer & Electrical testing bench

RAPT High Precision Current Sensor Naming Principle


RAPT High Precision Current Sensor Catalog

- precision current sensor with Small Aperture Products

Model NumberNominal Range (A)Maximum Range (A)RationSecondary Output (mA)Bandwidth (kHz)Accuracy (ppm)Linearity (ppm)Power Supply (V)Aperture (mm)Housing TypeDatasheet
RAPT100-D28I±100±150500:1±200800202±12~±1528IntegratedRequest Datasheet & Quote
RAPT200-D28I±200±2401000:1±200300102±12~±1528IntegratedRequest Datasheet & Quote
RAPT400-D28I±400±4801000:1±400300102±15~±1828IntegratedRequest Datasheet & Quote
RAPT600-D28I±600±7201000:1±600300102±15~±1828IntegratedRequest Datasheet & Quote
RAPT800-D30I±800±9601500:1±533.3250102±18~±2430IntegratedRequest Datasheet & Quote
RAPT1000-D30I±1000±12002000:1±500200102±2430IntegratedRequest Datasheet & Quote

- precision current transducer with Big Aperture Products

Model NumberNominal Range (A)Maximum Range (A)RationSecondary Output (A)Bandwidth (kHz)Accuracy (ppm)Linearity (ppm)Power Supply (V)Aperture (mm)Housing TypeDatasheet
RAPT1000-D90I±1000±12001000:1±1.0100102±1890IntegratedRequest Datasheet & Quote
RAPT2000-D90I±2000±24002000:1±1.050102±2890IntegratedRequest Datasheet & Quote
RAPT3000-D90I±3000±36003000:1±1.030102±2890IntegratedRequest Datasheet & Quote
RAPT3000-D120I±3000±36003000:1±1.030102±42120IntegratedRequest Datasheet & Quote
RAPT4000-D90I±4000±48004000:1±1.020102±4290IntegratedRequest Datasheet & Quote
RAPT4000-D120I±4000±48004000:1±1.020102±42120IntegratedRequest Datasheet & Quote
RAPT5000-D90I±5000±60005000:1±1.020102±4890IntegratedRequest Datasheet & Quote
RAPT5000-D120I±5000±60005000:1±1.020102±48120IntegratedRequest Datasheet & Quote

- precision current sensors with Big Aperture with split hosing Products

Model NumberNominal Range (A)Maximum Range (A)RationSecondary Output (A)Bandwidth (kHz)Accuracy (ppm)Linearity (ppm)Power Supply (V)Aperture (mm)Housing TypeDatasheet
RAPT1000-D60S±1000±12001000:1±1.0100102AC220V60SplitRequest Datasheet & Quote
RAPT2000-D60S±2000±24002000:1±1.050102AC220V60SplitRequest Datasheet & Quote
RAPT2000-D90S±2000±24002000:1±1.050102AC220V90SplitRequest Datasheet & Quote
RAPT3000-D90S±3000±36003000:1±1.030102AC220V90SplitRequest Datasheet & Quote
RAPT3000-D120S±3000±36003000:1±1.030102AC220V120SplitRequest Datasheet & Quote
RAPT3000-D160S±3000±36003000:1±1.030102AC220V160SplitRequest Datasheet & Quote
RAPT4000-D90S±4000±48004000:1±1.020102AC220V90SplitRequest Datasheet & Quote
RAPT4000-D120S±4000±48004000:1±1.020102AC220V120SplitRequest Datasheet & Quote
RAPT4000-D160S±4000±48004000:1±1.020102AC220V160SplitRequest Datasheet & Quote
RAPT5000-D90S±5000±60005000:1±1.020102AC220V90SplitRequest Datasheet & Quote
RAPT5000-D120S±5000±60005000:1±1.020102AC220V120SplitRequest Datasheet & Quote
RAPT5000-D160S±5000±60005000:1±1.020102AC220V160SplitRequest Datasheet & Quote
RAPT6000-D90S±6000±72005000:1±1.220102AC220V90SplitRequest Datasheet & Quote
RAPT6000-D120S±6000±72005000:1±1.220102AC220V120SplitRequest Datasheet & Quote
RAPT6000-D160S±6000±72005000:1±1.220102AC220V160SplitRequest Datasheet & Quote
RAPT8000-D120S±8000±96005000:1±1.620102AC220V120SplitRequest Datasheet & Quote
RAPT8000-D160S±8000±96005000:1±1.620102AC220V160SplitRequest Datasheet & Quote
RAPT8000-D200S±8000±96005000:1±1.620102AC220V200SplitRequest Datasheet & Quote
RAPT10K-D120S±10000±120005000:1±2.010102AC220V120SplitRequest Datasheet & Quote
RAPT10K-D160S±10000±120005000:1±2.010102AC220V160SplitRequest Datasheet & Quote
RAPT10K-D200S±10000±120005000:1±2.010102AC220V200SplitRequest Datasheet & Quote
RAPT15K-D160S±15000±180005000:1±3.010102AC220V160SplitRequest Datasheet & Quote
RAPT15K-D160S±15000±180006400:1±2.3437510102AC220V160SplitRequest Datasheet & Quote
RAPT15K-D200S±15000±180006400:1±2.3437510102AC220V200SplitRequest Datasheet & Quote
RAPT20K-D200S±20000±240006400:1±3.1258102AC220V200SplitRequest Datasheet & Quote
RAPT20K-D250S±20000±240006400:1±3.1258102AC220V250SplitRequest Datasheet & Quote
RAPT20K-D250S±20000±240008000:1±2.55102AC220V250SplitRequest Datasheet & Quote
RAPT25K-D250S±25000±300008000:1±3.1255102AC220V250SplitRequest Datasheet & Quote

How to select high accuracy current sensors

Consideration of a number of factors is required when choosing a high-precision current sensor to guarantee optimum performance in your particular application. Here are some points to assist you in selecting the ideal current sensor:

Measurement range: Determine the minimum and maximum current levels that your programme requires. Select a current sensor with a measurement range that can accommodate these values.

Choose the type of sensor: Hall effect sensors, current shunts, Rogowski coils, and fluxgate current sensors are a few examples of the different kinds of current sensors. Each variety has distinct benefits and drawbacks. Choose the type that best satisfies the criteria of your application after researching the various types.

Linearity: consider the level of precision needed for your application. Higher linearity and fewer measurement errors are usual characteristics of high-precision current sensors. Choose a sensor whose accuracy rating satisfies or surpasses your requirements.

Resolutions:  the smallest change in current that a current sensor can sense is referred to as its resolution. More precise and thorough readings will be produced by a sensor with a higher resolution. Select a sensor whose sharpness satisfies the demands of your application.

Bandwidth: the frequency range that a current sensor can reliably measure current over is known as its bandwidth. Choose a gauge whose bandwidth includes the frequency range that is relevant to your application.

Temperature stability: Temperature variations may have an impact on the effectiveness and precision of current monitors. To guarantee accurate measurements over the operating temperature range of your application, choose a sensor with good temperature stability.

Response time: The amount of time it takes for a current sensor’s output to change in response to an input current shift. Select a sensor whose reaction time is adequate for the demands of your application.

Isolation: Depending on your application, a current gauge with galvanic isolation between the main current path and the sensor output may be necessary. This can lessen the likelihood that the sensor’s performance will be impacted by electrical noise and disruptions.

Secondary output types: Current sensors have a variety of output signal types, including analogue voltage, current, and digital signals. Select a sensor whose output form complies with the demands of your system.

Size and form: Take into account the current sensor’s dimensions and form factor, particularly if room is an issue in your application. Select a sensor that will fit into your device without creating any mechanical problems.

You can choose a high-precision current sensor that satisfies the requirements of your application and offers precise, dependable measurements by taking these aspects into account. And, you can also feel free to get in touch with our experts for assistance. 

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