magnetic system design and current measurement solutions

IoT Current and Voltage Sensor

IoT Current and Voltage Sensor with WiFi Interface and Cloud Connection.


  • Multisensor system: DC and AC Current (Hall, shunt, CT), voltage, temperature
  • WiFi interface with cloud connectivity
  • Transceiver extensible (LoRa, ZigBee, CAN)
  • Galvanically isolated split-core design
  • Contactless Melexis 91208 Hall sensor


  • Internet of Things (IoT), Internet of Everything (IoE)
  • Monitoring of battery driven equipment
  • Workplace safety, factory monitoring
  • Energy efficiency / cost monitoring
  • Solar power
  • Prototyping, development, test platform


The IoT Current and Voltage Sensor consists of four sensors: (i) contactless Hall or CT current sensor, (ii) shunt resistor based current sensor (iii) battery voltage sensor, and (iv) temperature sensor. The four sensor signals are read by analog-to-digital converters (ADCs), processed by a programmable state-of-the-art microcontroller, and uploaded to the cloud via WiFi interface. The connectivity of the module is extensible to CAN, LoRa, GSM, Zigbee, Bluetooth, and Ethernet interfaces.

A particular feature of the product is its easy and safe installation without interrupting the primary current wire by using contactless galvanically isolated Hall sensor technology. This additionally allows the module to be used for hassle-free retrofit application.

The device is supplied directly with 5V…60V DC from the primary battery and optionally can be operated with a secondary 9V battery for autonomous use.


Parameter Typical Value Unit
Primary input current range (DC and AC) ±5…±2000 A
Voltage measurement range (DC and AC) ±1…±1000 V
Measurement accuracy 1.0 %
Operation temperature range -40…85 °C
Supply voltage 12 (5…60) VDC
Battery supply for autonomous use 9 VDC
Output refresh time 10.01



1 wired connection
2 wireless connection





The IoT Current and Voltage Sensor module is available in several variants:

  • Single-channel sensor frontend
  • Multi-channel sensor frontend, e.g., 4-channel solution for the solar applications
  • Interface options include WiFi, CAN, LoRa, GSM, Zigbee, Bluetooth, Ethernet
  • Power supply directly from your 12V..48V batteries
  • Autonomous supply with separate 9V battery
  • Hall, CT, or shunt current sensor technologies available






Battery-Driven Fleet and Tools


Workplace Safety / Energy Efficiency


Renewable Energy, Solar Power, and Smart Grid

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