IN 100-S

Current Sensors Overview

The LEM IN 100-S is a high-precision current sensor utilizing closed-loop fluxgate technology. It features a rated measurement current of 100A and a maximum capacity of 150A for both AC and DC signals. The device operates on a ±15V dual-polarity power supply and provides signal output via a DB9 interface with an integrated status LED indicator. It offers exceptional accuracy up to 0.0018% with linear error in the ppm range, covering a bandwidth from DC to 2MHz. The unit functions within a temperature range of -40°C to +85°C.

Current Sensors Feature Summary

• Employs closed-loop fluxgate zero-flux detection principle to maintain near-zero magnetic flux inside the core.
• Provides superior immunity against temperature drift and external stray magnetic fields compared to standard Hall sensors.
• Features a robust metal housing structure designed for excellent electromagnetic compatibility (EMC) performance.
• Delivers high-precision isolated measurement capabilities suitable for metrology and calibration-grade testing applications.

Current Sensors Applications

• Power supply testing and analysis
• Battery research and development
• Calibration units and energy measurement systems
• High-performance gradient amplifiers for MRI equipment

Current Sensors Procurement Notes

Verify the specific part number designation against official LEM documentation to ensure correct model identification. Confirm that the required ±15V dual-polarity power supply matches the sensor's operational specifications. Ensure proper alignment of the primary conductor with the sensor's directional arrow to prevent measurement anomalies. Check for any specific interface cable requirements associated with the DB9 connector.

Current Sensors Selection Notes

Select this component when ultra-high precision and wide bandwidth are critical requirements. The fluxgate technology is preferred over Hall effect sensors for applications demanding minimal zero drift and ppm-level linearity. Consider the physical dimensions and DB9 interface compatibility during system integration planning. Evaluate the thermal environment to ensure operation remains within the specified -40°C to +85°C range.

Current Sensors Part Context

The IN 100-S belongs to the LEM IN series, recognized as a classic product line for high-accuracy current sensing. It represents a significant advancement in measurement reliability by leveraging fluxgate technology to overcome limitations found in conventional open-loop or basic closed-loop Hall sensors. This series is engineered for rigorous industrial and laboratory environments where data integrity is paramount.

Current Sensors Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.

Current Sensors FAQ

How does the IN 100-S achieve higher accuracy than standard Hall sensors?

It uses a closed-loop fluxgate zero-flux detection principle that keeps the magnetic flux in the core near zero, significantly reducing temperature drift and interference from external magnetic fields.

What is the impact of incorrect wiring direction?

Reversing the current direction relative to the sensor's arrow marker will not damage the device but will cause measurement data anomalies.