Easy to use coil current probes for AC or fast pulse current measurements

Saelig Company offers the Teledyne Test Tools T3RC Rogowski Current Probes that provide broad current measurement ranges and a wide frequency span which offer easy to use in difficult-to-reach parts of circuits. Five models are available, giving measurement capabilities up to 6,000A and with the ability to connect around the leg of a small T0-220 device. The probes connect to any standard oscilloscope through a conventional BNC connection.

The flexibility of the probe sense coil indicates that measurements can normally be made with no modification to the circuit under test, providing more accurate electrically-isolated results with a very low insertion load (a few pH). Being created for either battery power or wall plug operation, these probes are both suited to field work or benchtop measurements.

The T3RC0300-UM version offers the smallest cross-section sense coil at only 1.7mm to enable probing around the leg of small power components such as inductors, capacitors or switching devices as small as a TO-220 MOSFET. The T3RC0600-HF and T3RC3000-HF models satisfy applications up to 600A and 3000A, respectively. With extended high-frequency coverage, 5kV peak insulation and a wide operating temperature range from -40C to +125C, these probes are excellent for both industrial temperature and general environments. The T3RC3000-LF and T3RC6000-LF versions provide an extended low-frequency performance down to less than 1Hz. The low-frequency performance signifies that the maximum droop on low-frequency pulses is typically 0.1%/ms or less while providing the highest level of peak insulation of 10kV and an operating temperature range of -20C to +100C.