Testing and Measurement Equipment

Rogowski Coil Current Sensor – Miniature High Frequency Probe

The CWT Miniature current probes utilize a thin Rogowski Coil sensor (typical cross section 3.5mm) designed to fit into confined spaces—often between the legs of semiconductor power switching devices. With high-frequency bandwidths up to 20MHz, these probes are ideal for measuring switching transients, pulsed currents, and high-frequency AC currents, starting at 300mA up to 300kA. The CWT Mini Rogowski probe is a flexible, clip-on current probe based on the Rogowski principle, offering high-bandwidth measurement and accurate conversion of current to voltage. It is designed for use with oscilloscopes, data loggers, power meters, and analyzers.

Available with 100mm or 200mm length clip-around coils, these current probes allow easy monitoring even where access is limited.

The CWT Mini 50 High Frequency Current Probe series is designed for high-performance current measurement in power electronics and switching devices, featuring a Rogowski Coil sensor that is slim enough (3.5mm cross-section) to fit in very confined spaces, such as between the legs of semiconductor devices. This series offers high-frequency bandwidths up to 50MHz, making it ideal for measuring switching transients or pulsed currents ranging from 300mA to 30kA. The flexible clip-around coil ensures easy current monitoring without system disruption and is compatible with oscilloscopes, data loggers, power meters, and power analyzers.

The CWTMiniHF – High Frequency Current Probe is a state-of-the-art, miniature Rogowski coil-based high-frequency current sensor designed for measuring switching transients or pulsed currents in power electronic devices. With a cross-sectional diameter of just 4.5mm, the flexible clip-around coil can be easily installed in confined spaces, making it ideal for applications such as measuring currents between semiconductor power switching devices. The CWTMiniHF offers a high-frequency bandwidth of up to 30MHz and can measure currents ranging from 300mA up to 300kA, with peak di/dt capabilities of up to 100kA/µs.

The PEM CWT Current Sensors are high-performance, clip-on, flexible Rogowski Coil-based wideband current probes designed for current measurement in various power electronic applications. These current sensors offer exceptional bandwidth and dynamic range, making them ideal for measuring both small and large currents across a range from 0.1A up to 1200kA, with frequencies ranging from 0.01Hz to 20MHz. Compatible with oscilloscopes, data loggers, transient recorders, and power analyzers, the CWT series delivers precise, reliable measurements without the need to break circuits during installation.

The CWT LF Current Probes are flexible, rugged current sensors designed using Rogowski Coil technology. They offer wide bandwidth measurement and faithful AC current-to-voltage conversion for use with oscilloscopes, data loggers, power analyzers, and power meters. These clip-on probes are ideal for power electronics applications, offering current sensing from 0.001Hz to 6.5MHz with accuracy and ease of use.