Lightning Electric Field Sensor - Field Mill

Lightning Electric Field Sensor Mounted onto Building

Pictured is an instrument called a Field Mill. This atmospheric monitoring device is designed to measure the strength of electric fields between the ground and the upper layers of the atmosphere, typically at cloud heights.

Lightning is the product of the difference in the potential voltage between the ground and the clouds, and if there is not enough difference in the potential voltages, then there can be no lightning in the area.

A typical electric field on a calm day would be around no more than 50 to 80 v/m.  However for lightning to occur you would need to see this potential build to around 1500v/m or higher.  Therefore by monitoring this change in the electric fields, you are measuring the potential for lightning to occur in your location.

Field Mills are used in working environments where early warning is crucial, so, as to avoid injury to personnel operating in the immediate area. The consequences of a lightning strike can be catastrophic!

While this sensor does not detect lightning strikes, Environdata can supply a quality Lightning Strike sensor for connection to your safety weather station, please just ask us!

Features at a Glance

  • Reduces the risk to personnel and equipment
  • Built to survive harsh environments
  • Provides 24 hour monitoring
  • Determines weather conditions likely to cause lightning
  • Compact and reliable design
  • Easy to install
  • Reliable and accurate
  • Fast response time
  • Includes mounting hardware
  • Lightweight
  • Long operating life

Parameters measured

  • Electric field

Industry Applications

  • Factories
  • Power Plants
  • Petrochemical Plants
  • Mining and Construction Sites
  • Hazardous Materials Management
  • Crane and Heavy Equipment Operations

Compatible with

  • Weather Maestro

Features In Detail

Details & Advantages

When the Field Mill is interfaced to our Weather Maestro weather station, the solution provides 24-hour monitoring. Our WeatherMation LIVE Service sends alerts and notifications via text message and email, this allows operators to take immediate action.

The Field Mill is a solution which is reliable, has a compact design and easy to install.


The stainless steel and aluminum construction includes paint and powder coating finishing to provide added protection against corrosion.

Weather Maestro with 5 metre mast installed at industrial complex