LF2005-S/SP44，LF 2005-S/SP44

‌LF2005-S/SP44 Product Description — The Reliable Choice for High-Temperature Industrial Current Sensing

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LF2005-S/SP44 ‌Key Features‌
‌Stable Operation in Extreme Temperatures‌: Engineered for demanding thermal environments, the LF2005-S/SP44 delivers consistent accuracy across a wide operating range of ‌-40°C to +85°C‌, eliminating performance degradation in high-heat applications such as welding equipment, metallurgical furnaces, and densely packed VFD cabinets.
‌Closed-Loop Hall Technology‌: Leveraging LEM’s patented closed-loop compensation architecture, it achieves ‌±0.2%‌ measurement accuracy by automatically correcting zero drift and nonlinearity — factory-calibrated and maintenance-free for life.
‌Flexible Dual-Supply Operation‌: Compatible with ‌±15 V to ±24 V‌ DC power rails, enabling seamless integration into industrial DC bus systems, UPS units, and multi-voltage platforms without additional regulation circuitry.
‌Compact Panel Mount Design‌: Standard panel mount installation supports both vertical and horizontal orientations, minimizing space requirements in crowded control panels. Features industry-standard Molex and JST terminal connectors for rapid, secure wiring.
‌Superior Electromagnetic Immunity‌: Fully enclosed magnetic circuit with a metallic shielded housing effectively suppresses EMI from IGBT switching and VFD clusters, ensuring clean, noise-free output signals even in the most electrically noisy environments.
‌Global Five-Year Warranty with Local Support‌: Backed by LEM’s worldwide five-year warranty, with dedicated technical support and ‌48-hour spare parts response‌ from the LEM China Technical Center in Jining, Shandong — minimizing downtime and maximizing system uptime.

LF2005-S/SP44 ‌Technical Specifications‌

‌Current Range‌: ±3000 A (DC, AC, pulsed)

‌Output Type‌: Current output (typical 50 mA)

‌Supply Voltage‌: ±15 V to ±24 V (dual supply)

‌Accuracy‌: ±0.2%

‌Response Time‌: <1 µs

‌Isolation Voltage‌: >5 kV RMS

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

‌Mounting Style‌: Panel mount, terminal block connection

‌Connector Options‌: Molex, JST industrial-grade interfaces

‌Certifications‌: EN 50178, CE, RoHS compliant

‌Weight‌: ~100 g

‌Housing Material‌: Metal shielded enclosure for enhanced thermal dissipation and EMI protection

LF2005-S/SP44 ‌Applications‌
The LF2005-S/SP44 serves as a critical sensing element in high-temperature, high-noise industrial systems:

‌High-Power Industrial Equipment‌: Dynamic current feedback and overload protection in arc welders, induction heaters, injection molding machines, and metal smelting furnaces

‌Renewable Energy Systems‌: Precise charge/discharge monitoring in photovoltaic inverter cooling modules, battery energy storage systems (BESS), and high-power DC-DC converters

‌Industrial Automation‌: Real-time current feedback and fault diagnostics in dense VFD arrays, servo drives, and switch-mode power supplies (SMPS)

‌Rail Transportation‌: Stable current sampling in locomotive auxiliary power units, traction converter cooling ducts, and braking resistor monitoring

‌Electric Vehicle Charging‌: Current monitoring within high-power DC fast-charging station power modules to ensure safety, efficiency, and long-term reliability

‌Why Choose LF2005-S/SP44?‌
In the competitive landscape of current sensing, the LF2005-S/SP44 stands out through ‌thermal resilience‌ and ‌system-level dependability‌:

‌Full-Rated Performance at +85°C‌: Unlike competing sensors that derate above 70°C, the SP44 maintains full ±0.2% accuracy at its upper limit — the only closed-loop sensor in its class that operates at full capacity without thermal throttling.

‌Plug-and-Play Integration‌: Standard 50 mA current output connects directly to PLCs, DCS, or data acquisition systems — eliminating the need for external signal conditioning circuits and reducing commissioning time by over 30%.

‌Industry-Leading Noise Immunity‌: Optimized magnetic shielding reduces output noise by 30% compared to leading competitors in VFD-dense factories, preventing false tripping and improving control stability.

‌Localized Technical Support‌: With LEM’s China Technical Center located in Jining, Shandong, customers receive ‌48-hour spare parts delivery‌, free engineering consultation, and on-site installation guidance — no international delays.

‌Lower Total Cost of Ownership (TCO)‌: Five-year warranty and zero-maintenance design eliminate unplanned downtime costs. Compared to open-loop alternatives, the SP44 reduces lifecycle costs by over 40%, delivering true “install-and-forget” reliability.