D-DOT: Flat-Plate Electric Field Sensor


The downward leader process and return stroke of cloud-to-ground lightning produce strong, transient electric fields at ground level that induce large voltages in nearby infrastructure, potentially leading to catastrophic consequences when unintended arcing and dielectric breakdown occurs.

Lightning protection, bonding, and shielding measures are implemented at critical facilities to minimize potential differences resulting from electric field excitation from nearby lightning. Are these measures sufficient? Are strong lightning-radiated electric fields causing damage to critical systems? Are bonded lightning protection systems and overhead catenary wire systems sufficiently reducing electric field gradients to eliminate arcing and upward leader generation from critical protected infrastructure?

D-Dot Sensor


Real-Time Measurements

Accurately determine the strength and location of lightning-radiated electric field sources that impact critical assets.


Continuous deployment in harsh outdoor environments.


Precisely capture fast lightning-generated electric field impulses.

Mounting Configurations

Sensor mounting to poles, beams, or flat surfaces in vertical or horizontal configuration.

Signal Conditioners

Add optional analog integrators to produce sensor outputs proportional to the electric field strength.

Ground-Truth Data

Capture ground-truth electric field waveforms for validation of threshold exceedance, verification of lightning protection and bonding performance/integrity, and inputs for electromagnetic and transient system models.

SLS’ sleek, weather-proof electric field derivative (D-dot) sensor accurately senses lightning-radiated electric field changes. The sensor detects preliminary breakdown and intracloud electric field impulses during lightning initiation, strong transient electric field signals related to downward leader propagation, and the extraordinarily large electric field change associated with the ground attachment and return stroke of close cloud-to-ground discharges. The dominant lightning electric field at ground level is in the vertical direction. However, SLS’ D-dot sensors can be mounted either vertically or horizontally to sense the different field components.  SLS’ D-dot sensor is constructed from aircraft-grade 6061 aluminum or stainless steel with a UV-resistant fiberglass protective dome. 

SLS’ D-dot sensors are currently being used to measure electric fields near NASA’s Artemis launch vehicle, are frequently deployed for NASA science missions, and are used to capture ground-truth data to verify the performance of large-scale lightning location networks.  Networks of SLS’ D-dot sensors are utilized to form time-of-arrival (TOA) systems to precisely locate lightning-related electric field changes in 2D and 3D. 


Part # SR-DDT-105-GP-04
Insulator Material PVC
Sensing Element Material 353 Brass
Ground Plate Material 6061 Aluminum or 316 Stainless Steel
Protective Dome Material UV-resistance Fiberglass
Mounting Horizontal, Vertical, Pole, Beam, Flat-Surface


Sensing Plate Diameter 0.1651 m
Sensitivity 105.5 kV/m/µs/V
Connectors Female N-type (1x), 50 Ω
Bandwidth > 25 MHz (-3 dB)
Output Single-Ended
Analog Integration Optional


Oil & Gas

Our sensors meticulously detect electric and magnetic anomalies caused by lightning, preserving the integrity of Oil & Gas operations and equipment.

Power Generation

Stay ahead of nature's unpredictability. Our sensors actively monitor lightning-induced electric and magnetic fields, ensuring Power Generation facilities run seamlessly.

Research Labs & Testing Facilities

Precision is paramount. Our sensors keenly identify electric and magnetic disturbances from lightning, ensuring research and testing processes remain accurate and undisrupted.

Automated Warehouse & Distribution Facilities

Keep automated logistics unhampered. Our sensors identify lightning-generated electric and magnetic disturbances, safeguarding both warehouses and the vital trucking activities around them.

Military & Defense

Every second counts in defense. Our sensors rapidly sense lightning-produced electric and magnetic fields, fortifying mission-critical military operations and assets.

Space Launch Ports

In the critical moments leading up to a launch, our sensors offer an extra layer of security, detecting electric and magnetic signatures from lightning events to safeguard Space Launch Ports.




B Dot Sensor

Detect the horizontal and vertical components of lightning-radiated magnetic fields.

Jupiter OLS

Jupiter OLS

Jupiter Optical Lightning Surveillance provides lightning-fast images and pinpoint strike location accuracy for 100% of strikes within the field of view.

Jupiter TMS

Jupiter TMS

Jupiter Transient Monitoring System delivers real-time reports of lightning-related transients with 0 dead time recording.

Dustin Hill

Meet Dr. Dustin Hill


For more information about Jupiter Optical Lightning Surveillance or related products, contact Dr. Hill by email or call his direct line.

Why Scientific Lightning Solutions

We offer unmatched expertise and innovation in lightning science and engineering. As a recognized global leader, we provide advanced lightning and transient monitoring solutions, sophisticated lightning protection system designs, and customized risk assessments. We collaborate with our customers to deliver solutions that meet each client’s unique needs and strike the right balance between cost and risk. Our team of scientists and engineers is at the forefront of lightning problem-solving and has a track record of providing solutions where others have fallen short. So, while we understand that we may not be the first company you contact about your lightning problems, we are confident we will undoubtedly be the last.

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