LT2005-S/SP19，LT 2005-S/SP19

LT2005-S/SP19 Closed-Loop Hall-Effect Current Sensor – Defining Precision and Reliability in Industrial Current Measurement with LEM Core Technology

Why the LT2005-S/SP19 is Your Best Choice for Current Monitoring?

In industrial automation and power electronics, the accuracy and real-time performance of current measurement directly determine the reliability and safety of system control. As the core component of current monitoring, the performance of Hall-effect sensors is critical. However, you may be struggling with issues such as accuracy drift, insufficient anti-interference capability, and overload risks in current measurement, or even facing production accidents caused by the performance deficiencies of monitoring equipment.

The LT2005-S/SP19 is a high-precision closed-loop Hall-effect current sensor designed specifically to solve these problems.

LT2005-S/SP19 Core Technology and Product Positioning

The LT2005-S/SP19 uses closed-loop magnetic balance Hall-effect technology (i.e., compensated Hall current sensor), with core technology provided by the globally renowned industrial measurement expert LEM (Switzerland), and is widely used as a key sensor module in ABB’s industrial automation field.

This technology is not ordinary open-loop measurement. Closed-loop Hall-effect technology actively compensates for magnetic flux, effectively eliminating errors caused by temperature changes, non-linearity, and magnetic core saturation in traditional Hall elements. It brings you extremely low temperature drift, excellent linearity, very fast response speed, and strong resistance to external interference. Based on this core technology, the LT2005-S/SP19 can accurately measure DC, AC, and pulse currents, with electrical isolation between the primary and secondary circuits, effectively ensuring the electrical safety of the system.

LT2005-S/SP19 Core Advantages: Four Dimensions, Surpassing Traditional Sensors 

Accurate Measurement, Reliable Data, Precise Control

High Accuracy: Typical accuracy across the full temperature range is ±0.3% to ±0.8%, providing you with extremely precise current feedback – a solid foundation for precision current control and protection.

No Insertion Loss: With closed-loop Hall technology, the sensor consumes almost no energy from the measured circuit, does not affect the original system performance, and avoids the failure of traditional CTs (current transformers) under low-frequency or DC conditions.

Stable Performance: Uses high-quality Hall elements, with temperature drift coefficient as low as ±0.015%/K. Whether in high-temperature equipment rooms in summer or cold outdoor environments in winter, it delivers consistent measurement output, solving the temperature drift problems that have long concerned you.

Safe and Reliable, Protecting Your System

Ultra-High Isolation Voltage: Dielectric isolation strength up to 4.0 kV, effectively isolating high-voltage and low-voltage systems, ensuring safety of the measurement end and control loop, allowing worry-free current monitoring in high-voltage environments.

Strong Anti-Interference Design: Built-in three-layer magnetic shielding and EMI filter, with electromagnetic interference attenuation up to >60 dB. Whether in inverters, motor start/stop, or high-noise environments of high-power switching power supplies, it always delivers a clean measurement signal.

Overcurrent Protection and Self-Diagnosis: Equipped with overcurrent protection and self-diagnosis function, real-time feedback of hardware status, effectively reducing system failure risks, enabling early warning and precise troubleshooting.

Wide Temperature Stable Operation: Supports -40℃ to +125℃ wide operating temperature range, suitable for industrial and infrastructure environments worldwide.

Flexible Configuration, Suitable for Various Industrial Scenarios

High Current Measurement Capability: Rated current 2000 A RMS, peak up to 3000 A, with extended measurement up to 5000 A. Whether for large motor loads or power systems, it handles them with ease.

Rich Interface Options: Provides multiple output interfaces such as RS-485 (supports Modbus protocol), analog (0-10V/4-20mA), which can be seamlessly integrated with mainstream industrial control systems like PLC and DCS without additional conversion modules.

Robust Structure and Compact Dimensions: Flame-retardant plastic housing compliant with UL 94-V0, preventing fire and leakage. Panel mount design, compact structure, easy to integrate into various electrical cabinets.

High Overload Capability: Excellent current overload capacity, maintaining superior measurement performance even when faced with instantaneous large surge currents, ensuring stable system operation.

Longer Lifetime, Lower Cost

AEC-Q100 automotive grade certified, using high-reliability components and materials, offering long-term reliability exceeding industry standards. By choosing the LT2005-S/SP19, you will enjoy years of stable measurement, minimizing downtime and maintenance costs caused by equipment failure.

LT2005-S/SP19 Technical Specifications Overview

LT2005-S/SP19 Typical Applications

Industrial Drives and Servo Drives: Precisely monitor and feedback inverter output current to achieve high-performance motor closed-loop vector control and overcurrent/overload protection.

Power Monitoring and Distribution Protection: Real-time monitoring of current load on primary/secondary side of distribution cabinets and transformers, providing accurate harmonic analysis and power factor calculation, enabling smart energy management and reliable protection.

Renewable Energy and Charging Facilities: Used for DC/AC side current monitoring in photovoltaic inverters, current detection in charging piles, and charge/discharge management in energy storage systems, helping build green power systems.

Uninterruptible Power Supplies (UPS) and Switch Mode Power Supplies (SMPS): Real-time monitoring of input and output current, ensuring stable output of the power system, and providing fast protection against abnormal conditions such as overload and short circuit.

Railway Traction and Locomotive Control: Suitable for real-time current monitoring of auxiliary converters in electric locomotives and subways, ensuring safe and efficient operation of rail transit.

Welding Equipment and Electroplating Power Supplies: Maintains stable and accurate measurement in high-frequency, highly dynamic current environments, improving welding quality and process consistency.

Why Choose LT2005-S/SP19? – Real Feedback from Industry Users

*“The LEM LT2005 series sensors perform excellently in accuracy and long-term stability. Used in our inverters, there have been no false alarms or failures in more than two years across several units, greatly reducing our system troubleshooting time.”*
– Chief Engineer, a large industrial automation equipment manufacturer

“From selection, procurement to technical support, the response is very fast. Our power monitoring system now uses LEM sensors exclusively. Problems encountered during the warranty period are directly replaced with new units, saving us a lot of communication and downtime costs.”
– Project Manager, a smart energy solution provider

LT2005-S/SP19 Core Highlights Summary