IT Series Current Transducer
The IT series are high-accuracy, closed-loop (zero-flux) sensors designed for precision AC and DC current measurement in demanding power electronics and power analysis applications. Their compensated fluxgate measurement principle provides excellent linearity, very low offset, and high long-term stability, supporting repeatable results across wide bandwidths and high-current operating conditions.
The IT series current transducers are designed to deliver precision AC and DC current measurements using closed-loop, zero-flux technology across a wide range of current ratings. By actively compensating the magnetic flux in the core, the IT architecture achieves excellent linearity, extremely low electrical offset, and strong long-term stability, making the series well suited for laboratory-grade power analysis, calibration environments, and high-performance power electronics testing.
Built for demanding test conditions, the IT series features robust mechanical construction and optimized EMC performance to ensure reliable operation in electrically noisy environments. Large apertures allow direct measurement of cables and busbars without interrupting the circuit, while flexible output options support straightforward integration with precision power analyzers and data acquisition systems. Together, these characteristics enable accurate, repeatable measurements under both steady-state and dynamic operating conditions.
IT 60-S ULTRASTAB
| Parameter | Specification |
|---|---|
| Nominal current (AC) | 42 A rms (continuous) |
| Nominal current (DC) | ±60 A (continuous) |
| Measuring range (continuous) | ±60 A |
| Measuring range (peak) | ±300 A (100 ms pulse) |
| Primary / secondary ratio | 600:1 (60 A → 100 mA) |
| Bandwidth | 500 kHz (±1 dB), 800 kHz (±3 dB) |
| Total accuracy | ±3 ppm linearity, 250 ppm offset (25 °C) |
| RMS noise (0–10 Hz) | 1 ppm (referred to primary) |
| Offset temperature coefficient | 2.5 ppm/K (referred to primary) |
| Aperture diameter | ≤ 26 mm |
| Supply voltage | ±15 V DC (±14.25 to ±15.75 V) |
| Output interface | Current output (D-Sub 9 male); status output; LED indicator |
| Manufacturer | LEM |
*These Current Transformers are manufactured by LEM Instruments and sold by Yokogawa Corporation of America. All data is in accordance with manufacturers specifications and is subject to change and correction.
IT 200-S ULTRASTAB
| Parameter | Specification |
|---|---|
| Nominal current (AC) | 141 A rms (continuous) |
| Nominal current (DC) | ±200 A (continuous) |
| Measuring range (continuous) | ±200 A |
| Measuring range (peak) | ±1000 A (100 ms pulse) |
| Primary / secondary ratio | 1000:1 (200 A → 200 mA) |
| Bandwidth | 150 kHz (±1 dB), 500 kHz (±3 dB) |
| Total accuracy | ±3 ppm linearity, 80 ppm offset (25 °C) |
| RMS noise (0–10 Hz) | 0.1 ppm (referred to primary) |
| Offset temperature coefficient | 2 ppm/K (referred to primary) |
| Aperture diameter | ≤ 26 mm |
| Supply voltage | ±15 V DC (±14.25 to ±15.75 V) |
| Output interface | Current output (D-Sub 9 male); status output; LED indicator |
| Manufacturer | LEM |
*These Current Transformers are manufactured by LEM Instruments and sold by Yokogawa Corporation of America. All data is in accordance with manufacturers specifications and is subject to change and correction.
IT 400-S ULTRASTAB
| Parameter | Specification |
|---|---|
| Nominal current (AC) | 282 A rms (continuous) |
| Nominal current (DC) | ±400 A (continuous) |
| Measuring range (continuous) | ±400 A |
| Measuring range (peak) | ±2000 A (100 ms pulse) |
| Primary / secondary ratio | 2000:1 (400 A → 200 mA) |
| Bandwidth | 150 kHz (±1 dB), 500 kHz (±3 dB) |
| Total accuracy | ±3 ppm linearity, 40 ppm offset (25 °C) |
| RMS noise (0–10 Hz) | 0.05 ppm (referred to primary) |
| Offset temperature coefficient | 1 ppm/K (referred to primary) |
| Aperture diameter | ≤ 26 mm |
| Supply voltage | ±15 V DC (±14.25 to ±15.75 V) |
| Output interface | Current output (D-Sub 9 male); status output; LED indicator |
| Manufacturer | LEM |
*These Current Transformers are manufactured by LEM Instruments and sold by Yokogawa Corporation of America. All data is in accordance with manufacturers specifications and is subject to change and correction.
IT 700-S ULTRASTAB
| Parameter | Specification |
|---|---|
| Nominal current (AC) | 495 A rms (continuous) |
| Nominal current (DC) | ±700 A (continuous) |
| Measuring range (continuous) | ±700 A |
| Measuring range (peak) | ±3.5 kA (100 ms pulse) |
| Primary / secondary ratio | 1750:1 (700 A → 400 mA) |
| Bandwidth | 50 kHz (±1 dB), 100 kHz (±3 dB) |
| Total accuracy | ±3 ppm linearity, ±50 ppm offset (25 °C) |
| RMS noise (0–10 Hz) | 0.05 ppm (referred to primary) |
| Offset temperature coefficient | ±0.5 ppm/K (referred to primary) |
| Aperture diameter | ≤ 30 mm |
| Supply voltage | ±15 V DC (±14.25 to ±15.75 V) |
| Output interface | Current output (D-Sub 9 male); status output; LED indicator |
| Manufacturer | LEM |
*These Current Transformers are manufactured by LEM Instruments and sold by Yokogawa Corporation of America. All data is in accordance with manufacturers specifications and is subject to change and correction.
IT 1000-S ULTRASTAB
| Parameter | Specification |
|---|---|
| Nominal current (AC) | 707 A rms (continuous) |
| Nominal current (DC) | ±1000 A (continuous) |
| Measuring range (continuous) | ±1000 A |
| Measuring range (peak) | ±4 kA (100 ms pulse) |
| Primary / secondary ratio | 1000:1 (1000 A → 1000 mA) |
| Bandwidth | 500 kHz (±3 dB) |
| Total accuracy | 3 ppm linearity, ±50 ppm offset (25 °C) |
| RMS noise (0–10 Hz) | 0.05 ppm (referred to primary) |
| Offset temperature coefficient | 0.5 ppm/K (referred to primary) |
| Aperture diameter | ≤ 30 mm |
| Supply voltage | ±15 V DC (±14.25 to ±15.75 V) |
| Output interface | Current output (D-Sub 9 male); status output; LED indicator |
| Manufacturer | LEM |
*These Current Transformers are manufactured by LEM Instruments and sold by Yokogawa Corporation of America. All data is in accordance with manufacturers specifications and is subject to change and correction.
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