Cost effective, compact unique design sensor

HLSR DIGITAL - Pulse Density Modulation sensor

The HLSR DIGITAL current transducers are meticulously optimized for the electronic measurement of DC, AC, and pulse currents while maintaining galvanic isolation between the primary and secondary circuits.

Compared to the standard HLSR family these sensors are distinguished by their digital characteristic, which is achieved through a bitstream output from an onboard Sigma Delta Modulator, utilizing Pulse Density Modulation (PDM) technology. This digital output enhances precision and flexibility in various applications.

The HLSR Digital sensors can be employed within a current measurement range spanning from 16 ARMS to 50 ARMS, accommodating a wide array of current measurement needs.

HLSR Digital electronic parts are exclusively designed for PCB mounting, offering ease of integration into electronic systems.

The HLSR Digital family provides various digital output options, including 2 wire CMOS, 2 wire RS422 Manchester, or 2 wires LVDS Manchester, ensuring compatibility with diverse industrial systems.

HLSR Digital sensors operate based on open-loop Hall effect sensor technology, making them well-suited for industrial applications where accurate and reliable current measurements are essential.

HLSR DIGITAL – Features and benefits

HO & HLSR digital output


  • Open loop hall effect multi-range current transducer
  • Bitstream output from 2nd order Sigma-Delta modulator, (PDM) Pulse Density Modulation
  • Single supply +5 V
  • Galvanic separation between primary and secondary circuit
  • Low power consumption
  • Compact design for through-hole PCB mounting
  • Factory calibrated
  • High bandwidth, very low loss magnetic core

Main characteristics

  • Extremely low profil: h = 12 mm
  • Low offset drift
  • Low footprint

Typical applications

The HLSR DIGITAL sensor family, with its precise design and digital capabilities, finds effective use in a variety of industrial systems, including:

  • AC variable speed drives and servo motor drives
  • Static converters for DC motor drives
  • Battery supplied applications 
  • Uninterruptible Power Supplies (UPS)
  • Switched Mode Power Supplies (SMPS)
  • Power supplies for welding applications
  • Combiner box
  • Solar inverter on DC side of the inverter (MPPT)

LEM HLSR DIGITAL – Download & Technical Characteristic

Product Document Primary nominal RMS voltage Supply Voltage range Op. Temperature
HLSR 16-PW-000 Datasheet 16 A 5 to 5 -40 to 105 °C
HLSR 16-PW-010 Datasheet 16 A 5 to 5 -40 to 105 °C
HLSR 32-PW-000 Datasheet 32 A 5 to 5 -40 to 105 °C
HLSR 32-PW-010 Datasheet 32 A 5 to 5 -40 to 105 °C
HLSR 40-PW-000 Datasheet 40 A 5 to 5 -40 to 105 °C
HLSR 40-PW-010 Datasheet 40 A 5 to 5 -40 to 105 °C
HLSR 50-PW-000 Datasheet
50 A 5 to 5 -40 to 105 °C
HLSR 50-PW-010 Datasheet 50 A 5 to 5 -40 to 105 °C
HLSR 50-PW-080 Datasheet 50 A 5 to 5 -40 to 105 °C


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