As its name suggests, a current sensor measures the flow of current in a conductor.
It can be used in a wide variety of applications, to control the electrical parameters of a locomotive engine for example, or the state of charge of an electric car battery.
For more than 50 years, LEM has grown its expertise and current sensor portfolio to answer the growing demand for current measurement solutions. With its broad portfolio of current sensors and voltage sensors, LEM can address many different applications and meet the various electrical measurement specifications of its customers, be it for accuracy, bandwidth, creepage.
This broad offer in current measurement solutions is the direct results of our many years of experience and expertise.
Current can be measured by a current transducer relying on different technologies.
A Hall Effect current sensor (open loop or closed loop) will provide an extended measuring range, good global accuracy while preventing from insertion losses.
The specificity of an air-core sensor is that it is working without a magnetic circuit. Also known as Rogowski current sensors, this technology is easy to use and allows for non-contact measurement of AC & pulsed signal.
The Fluxgate current sensor technology will bring the highest accuracy and a strong performance of the current measurement.
HLSR is our best seller in the solar industry. It brings a lot of benefits along with a small footprint.
HAH3DR is our 3 phase current sensor for automotive motor control
CAB is the best in class current transducer family for state of charge estimation in EV battery management systems
LAH family are closed loop current sensors dedicated to industrial applications
CTSR is a closed loop current sensor with high accuracy and very low offset drift over temperature to ensure electrical safety in industrial applications
The selection of a current sensor is the result of a technical and economic trade-off, considering the sensor as well as the whole associated system.
Prior to selecting a current transducer, it is mandatory to consider all aspects of the intended application first.
The following parameters will need specific attention:
Performing tests in the specific application environment is also strongly recommended to make sure that the current sensor is the right fit for it.
Current sensors are used in every area where electricity is used. And there are lots of domains complying to this: