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LEM | Global Leader in Current Measurement Solutions

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LEM | Global Leader in Current Measurement Solutions Skip to main content EN JP CN EN JP CN Check Stock Career Investors Contact Products Applications Support About Lem Search Current Sensors 45-90 A 90-180 A 187.5-375 A 375-750 A 750-1500 A 1500-3000 A 3000-6000 A 6000-12000 A 12000-24000 A Other value All Current Sensors Voltage Sensors 25-50 V 50-100 V 100-200 V 200-400 V 400-800 V 800-1600 V 1600-3200 V 3200-6400 V All Voltage Sensors Integrated Current Sensors GO Series HMSR Series GXS Series GXN Series GXM Series All Integrated Current Sensors Rogowski Coil ART Series ARU Series ARH Series INTEGRATORS FOR ROGOWSKI COILS Energy Meters DCES DCBM 400 & 600 DCBM 100 TEMA4G EM4T II All Energy Meters Automotive Battery Management EV Chargers Automotive Motor Control Smart Grid Welding Automation Drives High Precision Power Supplies Renewable Energies Trackside Traction After Sales & RMA Merchandize authorization RMA Categories All after sales and RMA Downloads Application Notes Brochures Certificates All Downloads Technical FAQs General All Technical FAQs Company Information History Board of Directors & Committees Organization Values Compliance Sustainability Our locations All Company Information Quality & Environment Quality Environment All Quality & Environment Our partners Become a LEM Supplier Our general terms & conditions Our distributors News & Events All News & Events What do you need ? Product information Check Stock Global information GO EN JP CN EN JP CN Products Current Sensors Voltage Sensors Integrated Current Sensors Rogowski Coil Energy Meters Applications Automotive Battery Management EV Chargers Automotive Motor Control Smart Grid Welding Automation Drives High Precision Power Supplies Renewable Energies Trackside Traction Support After sales and RMA Downloads Technical FAQs About Lem Company Information Quality & Environment Suppliers News & Events Check Stock Career Investors Contact What do you need ? Product information Check Stock Global information GO How LEM Reduces Its Carbon Footprint on the Path to Net Zero 2040 Read more How LEM Drives the Electrification of Long-Haul Transport Read more LEM Achieves IATF Compliance at Bulgaria and Malaysia Sites Read more Our solutions for Smart Grid Applications Read more Your trusted partner for Electrical measurement solutions PRESENTATION LEM at a glance Through its innovative electrical measurement solutions, LEM is helping customers and society accelerate the transition to a sustainable future. With 1,700 people in over 17 countries transforming technology potential into powerful answers, LEM develops and recruits the best global talent, working at the forefront of mega trends such as renewable energy, mobility, automation and digitization. LEM Live WHAT'S NEW AT LEM? Products DCES Series – DC Meter Direct Current Energy Sensor – LEM’s new generation of DC metering solutions Products HSU Series Hybrid battery current sensor combining Shunt and Hall technologies Products IN Series Ultra-accurate and low noise level current sensors ranging from 200 to 2,000 A. Products SMU Series The new Single Monitoring Unit (SMU) for accurate SOC estimation across all EV technologies Products FRS & FL Series Our new Open Loop Coreless Integral sensors (OLCI) for the electronic measurement of current up to 42kA Products CDT series CDT is an automotive grade leakage current sensor family also called Residual Current Monitoring (RCM) or Residual Current Detection (RCD) class B View more KEY FACTS Why choose LEM? Quality Certifications & Warranty Innovation Continuous R&D Environment Nature & human health protection More about LEM Applications Discover LEM sensors and system's applications Drives Without being aware of it, people probably walk by and even use several LEM transducers each day. Transducers are present in... Read more Renewable Energies LEM transducers, specifically designed for renewable power systems, control the flow and waveform of energy... Read more Power Supplies Power supply based applications using devices made up of power electronics (chargers, DC links, batteries, inverters and/or rectifiers)... Read more Traction Modes of public transport such as high-speed trains, city transit systems and freight trains provide the ideal solution to meet the increased demand... Read more High Precision In many industrial applications, highly-precise current measurement is key to equipment performance. Minor inaccuracies can cause... Read more Welding For a welding process to be successful, the 2 parts to be welded must be exposed to an intense heating source usually created with an electrical... Read more Trackside The rail industry is constantly evolving. Privatization of rail networks brought new requirements such as rail maintenance... Read more Automation Electrical signals are the power source for all manufacturing processes, machines and systems. In addition, they enable the fast... Read more Automotive Battery Management LEM works with all the major car manufacturers and Tier-1 suppliers in the world, and supplies galvanically-isolated... Read more Automotive Motor Control LEM Automotive is specialized in developing and manufacturing electronics transducers... Read more Smart Grid The intelligent electricity network (Smart Grid) is the backbone of the energy system. Our energy system is amidst a radical transition... Read more EV Chargers One of the biggest challenge of the 21st century will be to decarbonized the traditional transportation accountable for over 25% of global... Read more Leading the world in electrical measurement LEM engineers the best current and voltage measurement solutions for energy and mobility, ensuring that our customers’ systems are optimized, reliable and safe.

Over our 50 years of history, we have been building a unique expertise and know-how in ASIC design, embedded software, product development, manufacturing and testing and we are proud to provide our customers with the broadest portfolio in the electrical parameters measurement industry. 

LEM sensors, transducers and ICS cover all your current and voltage measurement needs from 10 to 2,000 A, and from 10 to 4,200 V.

We manufacture thousands of current sensors, voltage sensors, ic sensors, rogowski coil solutions and energy meters.

The trend for electrification has an impact on all markets and sectors. It increases the need for electrical measurement not only in existing systems but also in new emerging applications. Our solutions to measure and monitor current and voltage play a key role in 6 application areas: motor control, power conversion, electrical safety, battery management, energy monitoring and energy metering. 

At LEM we help our customers and society accelerate the transition to a sustainable future. Our current and voltage sensors, our current billing meter and current monitoring solutions (or smart grid sensors) help provide continuous power supply, control energy consumption, and promote renewable energy and contribute to the reduction of electrical consumption within our customers’ systems.

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