Optical-probe-Electric-Current-Sensor　OpECS IWATSU ELECTRIC

Semiconductor Devices, Power Devices, Wire Bonding, Busbars, Coils

■ Ultra-small sensor head (Minimum Φ0.45mm)
■ Supports isolation current measurement
■ Wide Bandwidth DC ～ 150MHz
■ Measurable current ±140A
■ Available on oscilloscopes with 50Ω BNC input

OpECS Working Principle
When a magnetic field exists at the sensor head, the linearly polarized light is affected by the magnetic field and its oscillation direction changes. The direction of oscillation follows an elliptical orbit according to the direction of the magnetic field, and the change in direction is proportional to the magnitude of the magnetic field. The elliptically polarized light information is sent to the main unit (control unit) at the latter stage, where it is converted from an optical signal to an electrical signal. This signal can be input to an oscilloscope or other device equipped with a 50Ω-terminated BNC connector to measure the current.