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A complete SMS alert package that sends text messages up to 16 phone numbers via a compatible GSM/GPRS/2G cellular service when lightning or high electric fields are detected within a range of up to 20 miles / 32km with the ERL-10 Kit 1, or up to 40 miles / 64km with the ERL-10 Kit 2. T-Mobile SIM required for USA residents.

ERL10-GSM1 Auto SMS Text Message Alert Package

GSM-1 / ERL-10 / EPM-1


2 alert levels (Red and Yellow)
All Clear alert (Green)
Fault alert
Store up to 16 numbers
Add or remove phone numbers by SMS command
Pre-wired and tested for simple one cable plug in from EFM-100 sensor



The GSM-1 SMS Text Message Dialer is pre-wired to the ERL-10 Programmable Relay Module so SMS text messages are automatically sent when local lightning is detected.   The GSM-1 allows up to 16 phone numbers and can be controlled with a cell phone sending it SMS commands to add and remove numbers.  A laptop USB connection can is needed to configure the ERL-10 alert parameters and count down timers using the provided software.

In the standard configuration, the ERL-10 receives data from the EFM-100C Electric Field Monitor sensor.  When lightning is detected, the relay module signals the GSM-1 to send text messages to the cell phone numbers programmed into the GSM-1. Once lightning is no longer detected another message will transmit indicating an all clear status.   Lightning alert distance thresholds, high electric field thresholds and time to All Clear are completely configurable. 

A valid GSM/GPRS micro SIM card with a text plan from a cell phone provider is required for operation.
USA: T-Mobile



Parts Included

Inverted EFM-100 (pre-assembled ready to mount on pole)
Pre-wired and tested DIN mounted GSM-1 / ERL-10 / EPM-1 (or EFA-21) modules
100 feet / 30 meters of sensor cable (up to 200 feet / 60 meters optional)
IP68 rated enclosure with transparent cover
120V US or 100-240V Universal Power Supply (12VDC operation is possible for solar installations)


Select Power Supply
Select Power Module
Select Cable Length
Select EFM-100 Mounting Kit

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