Wireless Current Loop Sensor / ZIO-20

EpiSensor Wireless Switch

  • Product Code: ZIO-20
Data Sheet


  • Easy to install and commission
  • Accuracy of +/- 2%
  • Current range: 4mA – 20mA
  • Voltage range: 0 – 3V
  • Low power consumption: ~ 1.1W
  • On-board data logging of up to 10,000 data points
  • Maximum, minimum, average and instantaneous sensors
  • Waterproof polycarbonate enclosure
  • Fully wireless communications
  • Wireless range up to 300m (LoS)
  • Dimensions (LxWxH): 144mm x 112mm x 35mm
  • Self-healing mesh network
  • 2.4GHz ISM band ZigBee® wireless radio
  • Fully secure communications: 128-bit AES encryption
  • Over-the-air software upgrade capability

Photo Stream


The EpiSensor ZIO-20, a rugged, mains-powered Wireless Analog Current Loop Sensor, monitors flow rates, pressures, levels, pH or any other energy related output which uses the industry standard 4-20mA current loop.

The ZIO-20 has a reliable on-board mains power supply and secure wireless ZigBee® mesh communications for easy installation and minimum disruption to normal operations. The unit is housed in a waterproof polycarbonate enclosure and has a wireless range of up to 300m outdoors.


The ZIO-20 can be used to monitor a wide range of analog parameters that relate either directly or indirectly to energy usage in commercial and industrial buildings.

An example of indirect energy usage would be to monitor flow rates in a compressed air line; a high flow rate is maintained outside of production hours could indicate a leak in the system, or incorrect configuration of the control system. An example of direct energy monitoring via analog current loop would be tracking the level of fuel oil in a tank.