Key Features:
Wide Bandwidth: 0.001Hz to 6.5MHz, ensuring comprehensive current measurement.
Flexible Clip-on Design: A clip-around, flexible sense coil for non-intrusive measurement, making it easy to install without interrupting active power systems.
Insulation: Standard insulation up to 10kVrms, with options for increased insulation levels.
Accurate Current Measurement: Can measure a broad range of current, from small to large (1A to 600kA), with ±0.2% accuracy and low phase shift (0.1-0.2 degrees).
Power Supply Options: Powered by 4 AA batteries or a 12V adapter, with an option for rechargeable batteries and an internal charger.
Technical Specifications:
| Model | Sensitivity (mV/A) | Peak Current (kA) | Peak di/dt (kA/µs) | Noise max (mV pk-pk) | LF Bandwidth (Hz) | HF Bandwidth (MHz) | Coil Length (mm) |
| CWT03LF | 100 | 0.06 | 0.4 | 15 | 5.1 | 6.5 | 300, 700 |
| CWT06LF | 50 | 0.12 | 0.8 | 15 | 2.6 | 6.5 | 300, 700 |
| CWT1LF | 20 | 0.3 | 2 | 15 | 1 | 6.5 | 300, 700 |
| CWT3LF | 10 | 0.6 | 4 | 15 | 0.55 | 6.5 | 300, 700 |
| CWT6LF | 5 | 1.2 | 8 | 15 | 0.27 | 6.5 | 300, 700 |
| CWT15LF | 2 | 3 | 11 | 15 | 0.11 | 6.5 | 300, 700 |
| CWT30LF | 1 | 6 | 11 | 15 | 0.055 | 6.5 | 300, 700 |
| CWT60LF | 0.5 | 12 | 11 | 15 | 0.022 | 6.5 | 300, 700 |
| CWT150LF | 0.2 | 30 | 11 | 15 | 0.008 | 6.5 | 300, 700 |
| CWT300LF | 0.1 | 60 | 11 | 10 | 0.008 | 6.5 | 300, 700 |
| CWT600LF | 0.05 | 120 | 11 | 5 | 0.008 | 6.5 | 300, 700 |
| CWT1500LF | 0.02 | 300 | 11 | 4 | 0.008 | 10 | 300, 700 |
For miniature coils with 3.5mm and 4.5mm diameters:
| Model | Sensitivity (mV/A) | Peak Current (kA) | Peak di/dt (kA/µs) | Noise max (mV pk-pk) | LF Bandwidth (Hz) | HF Bandwidth (MHz) | Coil Length (mm) |
| CWT03LF | 100 | 0.06 | 0.4 | 16 | 11 | 5 | 100, 200 |
| CWT06LF | 50 | 0.12 | 0.8 | 16 | 5.6 | 12 | 100, 200 |
| CWT1LF | 20 | 0.3 | 2 | 15 | 2.3 | 12 | 100, 200 |
| CWT3LF | 10 | 0.6 | 4 | 15 | 1.1 | 12 | 100, 200 |
| CWT6LF | 5 | 1.2 | 8 | 15 | 0.55 | 12 | 100, 200 |
| CWT15LF | 2 | 3 | 14 | 15 | 0.22 | 12 | 100, 200 |
| CWT30LF | 1 | 6 | 14 | 15 | 0.11 | 12 | 100, 200 |
| CWT60LF | 0.5 | 12 | 14 | 15 | 0.055 | 12 | 100, 200 |
| CWT150LF | 0.2 | 30 | 14 | 15 | 0.022 | 12 | 100, 200 |
| CWT300LF | 0.1 | 60 | 14 | 15 | 0.011 | 12 | 100, 200 |
Applications:
Power Analyzers: Expand the current and power measurement range with low-frequency performance (down to 0.5Hz) without bandwidth loss.
Motor Drives & Power Converters: Measure IGBT switching times and peak currents in motor drives and converters.
Induction Heating: Monitor high currents and frequencies, capturing harmonic effects.
Semiconductor Applications: Ideal for monitoring pulsed current in semiconductor devices such as IGBT, power MOSFETs, and for capacitor discharge and circuit breaker research.
Lightning Strike Research: Accurate measurement of peak currents in capacitor discharge and lightning-related experiments.
Accessories:
All CWT LF models come with:
BNC-BNC cable
12-24V DC input
4 AA batteries
Universal power adapter (110V/230V)
Calibration certificate
Carry case