LEM IN 1200-S IN Series Ultra-Stab Closed Loop Fluxgate Current Transducer
LEM IN 1200-S Product Overview
The IN 1200-S is a closed-loop Fluxgate current transducer from LEM's IN Series, designed for the ultra-high precision measurement of DC, AC, and pulsed currents with galvanic isolation between the primary circuit and the secondary circuit. This panel-mount transducer features a large aperture for primary conductor installation and delivers exceptional accuracy for demanding calibration, medical, and industrial applications.
Rated for 1200 A nominal with a measuring range of ±1800 A, it outputs an instantaneous secondary current with 0.01% accuracy and excellent linearity. The Fluxgate principle offers extremely low offset drift, very low output noise, high immunity to external interference, and no insertion losses. The output interface is via a 9-pin D-Sub male connector, and an optically insulated status output with LED indicator confirms normal operation. The large aperture enables non-intrusive installation of primary conductors without disconnecting existing cables. The transducer is designed for panel mounting and features an insulating plastic case recognized according to UL 94-V0.
LEM IN 1200-S Key Specifications
|
Parameter |
Value |
|
Rated current (IPN) |
1200 A |
|
Measuring range (IPM) |
±1800 A |
|
Output signal |
Current (secondary) |
|
Supply voltage (VC) |
±15 V (±5%) |
|
Accuracy (X) |
0.01 % |
|
Aperture |
Large aperture |
|
Operating temp (TA) |
-10°C to +70°C |
|
Mounting |
Panel |
|
Secondary connection |
9-pin D-Sub male |
|
Technology |
Closed-loop Fluxgate |
LEM IN 1200-S Key Advantages
The IN 1200-S employs closed-loop Fluxgate technology, delivering 0.01% accuracy while providing galvanic isolation with an electrostatic shield between primary and secondary circuits. The Fluxgate principle offers excellent linearity, very low offset drift, low noise output, high immunity to external interference, and no insertion losses. The optically insulated status output with LED indicator confirms normal operation. The ±1800 A measuring range accommodates significant overload conditions up to three times the nominal value for short durations. The large aperture enables non-intrusive installation of primary conductors without disconnecting existing cables.
LEM IN 1200-S Typical Applications
Feedback element in high-performance gradient amplifiers for MRI
Feedback element in high-precision, high-stability power supplies
Calibration units and test benches in laboratories
Energy measurement and power analyzers
Medical equipment (X-ray imaging)
High-accuracy industrial metrology
Calibration of current sources
Differential current measurement applications
Why Choose the LEM IN 1200-S?
The IN 1200-S combines a 1200 A rated current and ±1800 A measuring range with 0.01% accuracy in a robust panel-mount package with a large aperture. Manufactured by LEM, it delivers stable, accurate, and safe current measurement for ultra-high precision applications. The closed-loop Fluxgate design provides exceptional accuracy, extremely low temperature drift, and excellent linearity, while the photocoupler status output and D-Sub connector offer flexible system integration. The wide -10°C to +70°C operating temperature range ensures reliable performance in demanding environments. This transducer is the ideal choice for MRI systems, calibration equipment, precision power supplies, and laboratory applications where absolute accuracy and long-term stability are critical.
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