Voltage sensors for Industrial and Traction - for high and medium voltage measurements.

DVM - Voltage Sensors

The DVM product family comprises a compact range of voltage sensors designed for high and medium voltage measurements in industrial and traction applications. These sensors are crafted for the electronic measurement of voltages, including DC, AC, and pulsed voltages, with galvanic separation between the primary and secondary circuits.

Specifically tailored for medium and high voltage measurements ranging from 600 to 4200 VRMS, the DVM voltage sensors feature a unique compact design and deliver exceptional overall accuracy. 

Powered by our patented insulation digital technology, the DVM components seamlessly blend low consumption, very high accuracy, and minimal temperature drift.

Within the DVM family, various voltage sensors cater to specific needs, including DVM, DVM-B, and DVM-UI, each with its own set of features.


DVM Voltage

DVM Voltage


  • Bipolar and insulated measurement of voltage
  • Current output for DVM parts, Voltage output for DVM-B sensors
  • Primary input and output connections with M5 studs or threaded inserts
  • Compatible with LV 100 family
  • Built-in device. 

The DVM-B voltage sensors feature input connections with M5 studs and output connections with M5 threaded inserts.

In contrast, the DVM-UI electronic components come with their own set of features:

  • Unipolar and insulated measurement from 0 to UP N
  • 4-20 mA instantaneous output
  • Unipolar power supply
  • Primary input and output connections with M5 studs. 

Main characteristics

  • Compact design (30% smaller, 25% less volume)
  • A unique design to cover all measuring voltage ranges 600 to 4200 VRMS
  • High level of insulation test voltage: 12 KVRMS / 50 Hz / 1 min
  • High level of RMS voltage (5 kV) for partial discharges extinction @10 pC
  • Excellent overall accuracy:
    • +/- 0.5% of Vpn at + 25°C
    • +/- 1% of Vpn over the operating temperature range
  • High bandwidth (short response time): 13 KHz (-3 dB) (50 µs)
  • Low consumption and low losses
  • Very low sensitivity to common mode voltage variations
  • Fast delay time
  • Low temperature drift
  • High immunity to external interferences.

Typical applications of the DVM Series

DVM sensors are commonly used in both railway settings (including fixed installations and onboard trains) and industrial applications. It is typical to find DVM sensors in the following applications:

  • AC variable speed 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
  • Renewable Energy (Solar and Wind)
  • Single or three phase inverters
  • Propulsion and braking choppers
  • Propulsion converters
  • Auxiliary converters
  • High power drives
  • Substations

The DVM-UI components are specifically designed for particular application fields, showcasing optimal performance in substations and trackside applications.

LEM DVM – Download & Technical Characteristic

Product Document Primary nominal RMS voltage Supply Voltage range Op. Temperature
DVM 600


600 V 12 to 24 -40 to 85°C
DVM 1000


1000 V 12 to 24 -40 to 85 °C
DVM 2000 Datasheet
2000 V 12 to 24 -40 to 85 °C
DVM 2000-B Datasheet
2000 V 15 to 24 -40 to 85 °C
DVM 2000-UI Datasheet
2000 V 15 to 24 -40 to 85°C
DVM 3000 Datasheet
3000 V 12 to 24 -40 to 85°C
DVM 3600 Datasheet
3600 V 12 to 24 -40 to 85 °C
DVM 4000 Datasheet
4000 V 12 to 24 -40 to 85 °C
DVM 4000-B Datasheet
4000 V 15 to 24 -40 to 85 °C
DVM 4000-DT/SP1 Datasheet
4000 V 24 to 24 -40 to 70°C
DVM 4000-UI Datasheet
4000 V 15 to 24 -40 to 85 °C
DVM 4200 Datasheet
4200 V 12 to 24 -40 to 85 °C


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