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Our best lightning detection package. Dual lightning sensors provide almost complete protection against false lightning alerts. Three programmable alert level relay output module kit designed for use with the EFM-100 and the LD-250 for high accuracy short range detection, along with coincidence mode for virtually eliminating all false alerts. This kit includes the ERL-10, EFM-100 and LD-250 pre-wired in a waterproof enclosure. Status monitor display software is also provided.

ERL10-KIT2 Dual Sensor Lightning Detection Package



• Coincidence Mode virtually eliminates all false alerts
• Pre-wired connector plugs into optional Alert Cabinet
• 1, 2 or 3 alert levels (Red, Red/Yellow, Red/Orange/Yellow)
• All Clear output (Green)
• Fully configurable alert distances, durations and high electric field levels
• 20 miles / 32 km range, extendable up to 40 miles/64km
• High electric field alert warns of conditions where first strike is more likely to occur
• Fault output indicates status of the system
• Status Monitor software shows current alert state and minutes:seconds until All Clear
• USB port for configuration and/or Status Monitor software
• Optional fiber optic connection between sensor and ERL-10 for remote mounted EFM-100 sensor


The ERL-10 receives data from the EFM-100 Electric Field Mill short-range sensor (<20 miles/32 km) and a LD-250 long range lightning detector. It constantly monitors for lightning and activates its timed relay outputs when lightning is detected. Up to three alerts can be configured, referred to as Red, Orange, and Yellow Alert levels. The green All Clear state is entered when no lightning has been detected within the configured time period.

When the ERL-10 is first turned on, it enters Survey Mode where it looks for lightning. After several minutes without lightning (configurable but typically 10-20 minutes) the system enters the All Clear state. The green All Clear light on the ERL-10 illuminates and the All Clear relay output activates.


Dual Sensor Coincidence Mode
With Coincidence Mode enabled, a lightning strike must be detected by both the EFM-100 and the LD-250 in order for an alert to activate. This virtually eliminates false alerts that could be caused by persons, animals, insects, etc. near the EFM-100 sensor. Coincidence Mode is only applicable within the range of the EFM-100 (0-20miles/0-32km).


Status Monitor
The ERL-10 Status Monitor software (included) allows the system status and countdown timers to be displayed. Countdown timers clearly indicate the number of minutes until All Clear. Alert activations are timestamped and logged to disk. Graphical log file viewing software is also included.

Parts Included

    ERL-10 Parts:

Pre-wired waterproof enclosure
ERL-10 Output Relay Module
A/B USB Cable
RS485 Cable (3 Wire)
120/220V AC Power Adapter
DIN Rail Clip
Status Monitor software for Windows

    EFM-100C Parts:

EFM-100 Short Range Detector
EFA-21 Power/Data Module
6 x Attenuator Plugs
100 Foot (30m) Cat6 Power/Data Cable
A/B USB Cable
120/220V AC Power Adapter
Grounding Wire
DIN rail clip for EFA-21
EFM-100 Display software for Windows

    LD-250 Parts:

LD-250 Long Range Detector
ANT-2 Lightning Sensor
Pole Mount Hardware for ANT-2
100 Foot (30m) Cat6 Antenna Cable
120/220V AC Power Adapter
DB9 Serial Cable**
NexStorm Lite Display software for Windows


Pre-Wired LD-250/ERL-10/EFA-21 with fault buzzer

Mounting Hardware included:
Inverted mounting mast*, shroud, Inverted EFM-100 cover, Junction box, Silicone grease, and a Pole Mount Bracket or Tripod

Optional fiber optic package includes fiber optic cable, EFA-20 with USB cable, and EFA-10 with DB9 serial cable

* Custom mounting masts available
** Optional DB9 Y-Splitter with additional DB9 cable to view Long Range Display software alongside ERL-10


*Select Power Supply
*Select Cable Length
*Select Mounting Kit
Optional LEDs for Pre-wired IP67 Enclosure
Fiber Optic Cable Package (Optional)

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