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APR Series Split-Core Sensors
LEM split-core current sensors provide flexible and precise AC current measurement across a wide adjustable range
LEM APR series split-core current sensors provide flexible and precise AC current measurement across a wide adjustable range from 10 A to 400 A, making them well suited for dynamic installation environments. Available in true RMS versions, they offer selectable output formats—including 4 mA to 20 mA, 0 V to 5 V, and 0 V to 10 V—to match diverse monitoring and control system requirements, all supported by a broad 30 Hz to 6,000 Hz bandwidth and an 18 mm aperture. The series also includes two electronic variants: the B10, designed for voltage output configurations, and the B420L, tailored for current output applications. Built on LEM PRiME (Planar Rogowski I Measurement) air core technology, APR sensors deliver reliable, accurate performance for energy and automation applications where dependable current measurement is critical.
- True RMS output
- Split-core type
- 0 VDC to 5 VDC and 0 VDC to 10 VDC switch selectable voltage output (APR-B10) or Loop powered 4 mA to 20 mA current output (APR-B420L)
- DIN rail or panel mounting
- Switch selectable measuring ranges
- Insulating plastic case recognized according to UL 94 V-0
- Equipped to measure VFD and SCR waveforms in current
- Large aperture for cable up to 18 mm
- High insulation between primary and secondary circuits
- Eliminates insertion loss
- Easy installation
- VFD controlled loads
- SCR controlled loads
- Switching power supplies and electronic ballasts
APR Series Split-Core Sensors
| Image | Manufacturer Part Number | Description | Sensor Type | Current - Sensing | Available Quantity | Price | View Details | |
|---|---|---|---|---|---|---|---|---|
 |  | APR 50 B10 | CURRENT SENSOR XFMR 10A,25A,50A | Transformer w/Conditioning | 10A, 25A, 50A (Selectable) | 26 - Immediate | $160.45 | View Details |
| | APR 50 B420L | CURRENT SENSOR XFMR 10A,25A,50A | Transformer w/Conditioning | 10A, 25A, 50A (Selectable) | 164 - Immediate | $182.64 | View Details |
| | APR 400 B10 | CURRENT SEN XFMR 200A,300A,400A | Transformer w/Conditioning | 200A, 300A, 400A (Selectable) | 23 - Immediate | $163.19 | View Details |
| | APR 400 B420L | CURRENT SEN XFMR 200A,300A,400A | Transformer w/Conditioning | 200A, 300A, 400A (Selectable) | 72 - Immediate | $184.84 | View Details |
| | APR 100 B10 | CURRENT SENSOR XFMR 50A,75A,100A | Transformer w/Conditioning | 50A, 75A, 100A (Selectable) | 13 - Immediate | $156.03 | View Details |
| | APR 200 B10 | CURRENT SEN XFMR 100A,150A,200A | Transformer w/Conditioning | 100A, 150A, 200A (Selectable) | 38 - Immediate | $167.44 | View Details |
|  | APR 200 B420L | CURRENT SENSOR TRANSDUCER | Current Transducer | 100A, 150A, 200A (Selectable) | 0 - Immediate | $151.96 | View Details |
| | APR 100 B420L | CURRENT SENSOR TRANSDUCER | Current Transducer | 50A, 75A, 100A (Selectable) | 0 - Immediate | $151.96 | View Details |
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