LV100/SP38 Closed-Loop Hall Effect Precision Voltage Sensor

LV100/SP38 Precision Drives the Future, Stability Powers High-End Applications!

In new energy, rail transit, industrial drives and other high-end applications, the accuracy of voltage signal monitoring faces extremely demanding requirements.

The LV100/SP38 from LEM, a world leader in precision sensors, is specifically designed for harsh industrial environments. As a high-performance representative of the LV100 series, it inherits LEM's core closed-loop Hall effect technology and offers excellent linearity and a wide voltage measurement range, making it the first choice of top power electronics engineers worldwide.

LV100/SP38 Core Performance Breakthroughs: 0.7% Accuracy & Wide Voltage Range

To ensure absolute system stability and efficient power conversion, even the slightest voltage error can trigger chain reactions. With the following hard-core specifications, the LV100/SP38 delivers the confidence your system needs:

1. ClosedLoop Hall Effect Technology – Eliminate Signal Drift

Compared with open-loop sensors, the advanced closed-loop Hall effect technology provides galvanic isolation between primary and secondary, fast response, no magnetic saturation, and excellent linearity across the full range.

2. ±0.7% High Accuracy Class

With accuracy as high as 0.7%, it supplies reliable voltage feedback for critical equipment such as inverters, SVG and UPS, enabling higher precision closed-loop control.

3. Wide Voltage Measurement Range: 100V to 2500V

Simply match the appropriate external resistor to measure nominal voltages from 100V up to 2500V. Whether for low-voltage test benches or 2500V high-voltage power lines, the LV100/SP38 handles it with ease.

LV100/SP38 More than Accuracy – Built for Reliability

While pursuing ultimate performance, the LV100/SP38 also sets the benchmark in industrial safety and reliability:

Panel Mount, Rugged Package

The standard panel mount housing easily fits into control cabinets and power modules. The compact mechanical design ensures adequate creepage distance between high and low voltages, while enabling smaller equipment layouts.

Wide Temperature Operation

With an operating temperature range of -25℃ ~ 70℃, it works reliably from outdoor charging piles in freezing regions to enclosed, hot electric control systems in mining machinery. The output signal remains stable even under harsh conditions.

High Insulation & Noise Immunity

Strong galvanic isolation between primary and secondary withstands severe electromagnetic interference in industrial environments. The current output is ideal for longdistance transmission, offering far better noise immunity than voltage-output devices.

Premium Global Supply Chain – LEM

Choosing the LV100/SP38 means choosing a world-renowned brand trusted for over 50 years in industrial sensing. This model is available in bulk packaging, with a minimum order quantity of 4 pieces. It is Active (in production).
The device is widely available on the market. In addition to industrial-grade stock for immediate delivery, some qualified distributors offer tiered pricing for larger volumes (e.g. recent market pricing: around USD 291.51 each for 4 pieces, dropping to about USD 242.93 each at 112 pieces), making high-volume procurement very costeffective.

LV100/SP38 Extensive Application Scenarios

Railway traction converters – Real-time monitoring of DC-link voltage to ensure smooth train acceleration and braking.

PV / wind inverters – Efficient voltage tracking to maximise renewable energy conversion (MPPT).

Medium/high voltage variable frequency drives – Robust galvanic isolation to prevent high-voltage side interference with controllers.

Electric vehicle power distribution units (PDU) – Precise monitoring of traction battery voltage to protect the three-electric system.

Laboratory high-precision power supplies – For high-accuracy output regulation and readback.

Why Choose LV100/SP38 Now?

Hardcore performance – Closed-loop Hall principle with 0.7% accuracy makes voltage measurement flawless.

Brand power – LEM quality ensures extremely low long-term ageing rates, reducing recalibration frequency.

Flexible adaptation – Simply select the appropriate external resistor to measure from 100V to 2500V.

Available from stock – A widely used model with ample inventory, shortening your development and production lead time.