PEM RCT AC Current Probe

The PEM AC Current Probes utilize a Rogowski Coil and Matched Analog Integrator to provide accurate non-contact, measurement of AC currents over a very broad frequency range. These flexible “clip-around” Current Probes have very low insertion impedance compared to Current Transformers, (CT), or Hall Current Transducers, are easy to insert in confined spaces and are not damaged by over-current surges. They can be used for measuring ac, pulse or transient current waveforms. Since the PEM Current Probes have no magnetic core they can be used to measure ac current on a conductor with high dc current or in the presence of a high dc magnetic field.

RCTAC Rogowski Coils have a DIN Rail Mounted Integrator for permanent or semi-permanent installation on equipment. They are exceptionally simple to retrofit into existing plant.

For all RCT AC Current Probes the nominal primary current rating is the rms current for a sine wave. The peak current rating is 1.41x the rms current rating.


  • Peak Current ratings from 30A to 300kA
  • Robust, flexible, clip-around coils
  • Integrator included with Rogowski Coil to provide an analog signal accurately proportional to primary current in amplitude and phase
  • High voltage isolation and common mode rejection
  • Measure ac current even in the presence of a high dc current
  • Not influenced by high dc magnetic fields
  • Bandwidth from 0.1Hz to 30MHz
  • No I*t limitation as with CT
  • Both battery (4xAA) and external DC power supply
  • CE marked
  • Special cryogenic versions
  • Special long coil versions


  • Monitoring current waveforms in semiconductor switches
  • Development, test and servicing of power electronic equipment.
  • Pulsed Power capacitor discharge and magnetic accelerator current measurements
  • Welding, motor drive, generator, currents
  • Ground currents in rotating machine shafts
  • Induction heating and plasma current measurements
  • Measuring AC currents in the presence of large DC currents
  • Fault monitoring, circuit breaker interuption and lightening strike currents
  • Monitor Battery and Capacitor Ripple Current


Product Configurator:

Select product options from drop-down menus to quote standard products not normally in stock. For fully custom products, fill in the message box below.

Order Code for all except RCTrms3ph: Type / Current Range / Cable Length / Coil Length
For example: RCTi/250/1/300

Order Code for RCTrms3ph: Type / Output / Current Range / Cable Length / Coil Length
For example: RCTrms3ph/420/2000/1/700

For descriptions of the possible selections, please see the Specifications above.

RCTi AC Current Probe

Part No.DescriptionPriceIn Stock

RCTi 3 Phase AC Current Probe

Part No.DescriptionPriceIn Stock

3 Phase AC Current Probe, 250A, 0.6 Hz-1MHz, 2.5m cable, 300mm coil circumference


3-phase AC Current Probe, 5kArms, 0.2Hz-620kHz, 4m cable, 500mm coil circumference

Quantity Price
1 - 9 $760.00
10+ $722.00

RCTrms AC Current Probe

Part No.DescriptionPriceIn Stock

AC Current Probe, 20Arms, 10V out, 12/24vdc, 11Hz-100kHz, 300mm coil circumference.

Note: This is a custom model coil for monitoring ac ripple current superposed on high dc current.

Quantity Price
1 - 9 $470.00
10+ $446.50

AC Current Probe, 250Arms, 4-20mA Output, 2Hz-100kHz, 1m cable, 300mm coil circumference

Quantity Price
1 - 9 $470.00
10+ $446.50

RCTrms 3 Phase AC Current Probe

Part No.DescriptionPriceIn Stock

RCT1A AC Current Probe

Part No.DescriptionPriceIn Stock

Terms and Conditions

Quantity Discount Schedule:

Quantity 1 – 9 10 – 24
Discount 0% 5%

Terms and Conditions:

Prices above are for domestic deliveries to Canada, USA and Mexico only.
Prices are expressed in U.S. Dollars, FCA San Carlos, California.
Prices are subject to change without notice.
Higher quantity and OEM discounts are available.


Visa, MasterCard, Amex, Prepayment before shipment, or Net 30 days (subject to credit


Items in stock shipped next business day. All other items up to 6 weeks.