LF2005-S/SP20，LF 2005-S/SP20

‌LF2005-S/SP20 Product Description — The Industrial Workhorse for Uncompromised Current Monitoring

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LF2005-S/SP20 ‌Core Advantage: Precision Without Complexity‌
The LF2005-S/SP20 is the definitive choice for engineers demanding ‌±0.3% accuracy‌ in high-stress industrial environments — without the added cost or complexity of digital interfaces. As a foundational model in LEM’s closed-loop Hall current sensor family, it delivers the same proven performance as its SP21, SP24, and SP28 counterparts, but with a streamlined design focused on ‌reliability, compatibility, and long-term stability‌. It doesn’t just measure current — it ensures system integrity under the most demanding conditions.

LF2005-S/SP20 ‌Key Features: Engineered for Industrial Endurance‌

‌Closed-Loop Hall Technology‌: Active magnetic feedback eliminates drift and hysteresis, maintaining ‌±0.3% accuracy‌ even during rapid transients from VFDs, inverters, and PWM-driven loads — critical for dynamic control systems.

‌Split-Core Clamp Design‌: Enables safe, tool-free installation on live conductors — ideal for retrofitting existing systems, minimizing downtime, and supporting predictive maintenance without interrupting operations.

‌Wide Dual-Polarity Supply Range‌: Operates seamlessly across ‌±12 V to ±24 V‌, compatible with industrial DC buses, UPS systems, and mixed-voltage control panels — no external regulators required.

‌Industrial-Grade Construction‌: Housed in ‌UL 94-V0‌ flame-retardant material with ‌IP54‌ ingress protection — fully functional from ‌-40°C to +85°C‌, ensuring consistent performance in unheated enclosures, outdoor substations, and high-vibration manufacturing lines.

‌Galvanic Isolation‌: Provides ‌6 kV RMS‌ isolation, certified to ‌EN 50178‌, protecting sensitive control electronics and personnel in high-voltage applications such as traction systems, battery arrays, and DC distribution networks.

‌Direct 400 mA Current Output‌: Delivers a linear, noise-immune signal compatible with PLCs, DCS, and SCADA inputs — eliminating signal conditioning circuits, reducing wiring errors, and accelerating system commissioning.

LF2005-S/SP20 ‌Technical Specifications‌

‌Rated Current‌: 2000 A (RMS)

‌Measurement Range‌: ±3000 A (DC, AC, Pulse)

‌Output Type‌: Current output (400 mA nominal)

‌Supply Voltage‌: ±12 V to ±24 V (dual polarity)

‌Accuracy‌: ±0.3% at 25°C

‌Linearity‌: ±0.1%

‌Response Time‌: <1 µs

‌Isolation Voltage‌: 6 kV RMS

‌Operating Temperature‌: -40°C to +85°C

‌Installation‌: Split-core clamp, compatible with Molex and JST industrial connectors

‌Protection Rating‌: IP54

‌Certifications‌: CE, RoHS, EN 50178

‌Warranty‌: Global 5-year warranty

LF2005-S/SP20 ‌Applications: Enabling Precision Across Critical Systems‌

‌Rail Traction Control‌: Monitors DC link and motor currents in metro and locomotive drives — enabling real-time fault detection, regenerative braking optimization, and predictive maintenance without service interruption.

‌Battery Energy Storage (BESS)‌: Tracks charge/discharge currents in lithium-ion and flow battery stacks — supporting cell balancing, thermal runaway prevention, and grid compliance in utility-scale installations.

‌Industrial Automation & Robotics‌: Integrates into servo drives and motion controllers for closed-loop current regulation — improving positioning accuracy, reducing mechanical wear, and minimizing unplanned downtime in high-speed production lines.

‌Renewable Energy Inverters‌: Measures DC input and AC output in solar and wind systems — enabling maximum power point tracking (MPPT), grid synchronization, and fault isolation under fluctuating environmental loads.

‌High-Power Converters & Rectifiers‌: Used in electroplating, electrolysis, and heavy-duty motor drives — ensuring stable feedback for precise power delivery under continuous high-load conditions.

‌Uninterruptible Power Supplies (UPS)‌: Monitors DC bus and inverter output currents in data centers and telecom facilities — preventing cascading failures and ensuring seamless transition during grid disturbances.

‌Why Choose LF2005-S/SP20?‌

‌Seamless Interchangeability‌: Shares identical mechanical footprint, pinout, and documentation with SP21, SP24, and SP28 — enabling effortless replacement, simplified inventory management, and future-proofed upgrades without redesign or retraining.

‌Zero-Downtime Installation‌: Install or replace without de-energizing circuits — preserving production schedules and operational continuity in mission-critical environments.

‌Thermal Stability Without Derating‌: Maintains full accuracy across the entire -40°C to +85°C range — no performance loss in unconditioned enclosures, outdoor installations, or high-temperature industrial zones.

‌Cost-Optimized Reliability‌: Delivers the same precision, isolation, and durability as premium variants — but without the added cost of non-essential features like IO-Link or digital interfaces. It’s not the most advanced. It’s the most dependable.

‌Proven Legacy Performance‌: Backed by LEM’s 50+ years of closed-loop Hall technology — engineered for continuous operation under stress, delivering maximum service life and minimal field failures across global industrial deployments.