High performance, cost effective, contactless current transducers for DC, AC and pulse currents measurements

HO Digital - Pulse Density Modulation Sensor

The HO DIGITAL current transducers have been meticulously optimized for the electronic measurement of DC, AC, and pulse currents while maintaining galvanic isolation between the primary and secondary circuits. The HO Digital family encompasses sensors from the HO-PW, HO-NPW, and HO-SW Series.

What sets these sensors apart from the standard HO sensors is their digital characteristic, which is achieved through a bitstream output from an onboard Sigma Delta Modulator, utilizing Pulse Density Modulation (PDM) technology. 

The HO Digital sensors can be employed within a current measurement range spanning from 20 ARMS to 250 ARMS, accommodating a wide array of current measurement needs.

While the HO-PW and HO-NPW electronic parts are designed exclusively for PCB mounting and feature a 15 x 8 mm aperture for the primary conductor, the HO-SW Series is tailored for panel mounting.

Regardless of the specific series, the entire HO Digital family offers various digital output options, including 2 wire CMOS, 2 wire RS422 Manchester, 2 wires LVDS Manchester, 4 wire LVDS, or 4 wire RS422, ensuring compatibility with diverse industrial systems.

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

HO DIGITAL – Features and benefits



  • Open loop multi-range current transducer
  • Bitstream output from second order Sigma-Delta modulator, Pulse Density Modulation (PDM)
  • Single supply +5 V
  • Overcurrent detect 2.97 x Ipn (peak value)
  • EEPROM Control
  • Galvanic separation between primary and secondary circuit
  • Low power consumption
  • Compact design tor THT PCB mounting and for Panel mounting
  • Aperture: 15 x 8 mm for HO-SW and HO-PW Series
  • Factory calibrated

HO-SW Digital current sensors come with additional features:

  • Connection mating with HARWIN:
    • Housing M30-1100800
    • Contact M30-1060046
  • Repositionable mounting foot

Main characteristics

  • Low offset drift
  • Creepage / clearance 8 mm
  • Fast response

Typical applications

The HO DIGITAL sensor family is meticulously designed for industrial applications and can be effectively utilized in a range of 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 (SPMS)
  • Power supplies for welding applications
  • Combiner box
  • Solar inverter on DC side of the inverter (MPPT)

LEM HO DIGITAL – Download & Technical Characteristic

ProductDocumentPrimary nominal RMS voltageMountingOp. Temperature
HO 80-NPW-0000Datasheet
200 APCB-40 to 105 °C
HO 120-NPW-0000Datasheet350 APCB-40 to 105 °C
HO 150-NPW-0000Datasheet350 APCB-40 to 105 °C


Looking to receive samples or a quotation? Please click on the contact button below and provide us with the information you need on this product series. Our sales team will get back to you shortly.

Contact Us