ebc 502hm

Last updated April 17, 2023. Please call for pricing – 718-401-0288, Option 2

Cabin mounted ELT with 720 degree spherical automatic activation. Has an integral antenna. Painted flat black for night vision goggle compatibility. Transmits on 121.5 and 243.0MHz. Meets TS0-C91a.

Product Manual

The EBC 502HM is a modified version of the EBC 502H. This ELT has been enhanced to survive the special conditions faced by the military. The antenna has been “beefed up” for increased survivability. A shorting plug has been added to disable the automatic activation feature during maintenance. The ELT is painted with a flat black, non-infrared reflective finish so that the unit is compatible with night vision equipment.

This ELT uses our proven omnidirectional activation system. This system uses 2 omnidirectional switches mounted perpendicularly to
each other. Since each senses impact in 360˚ the total coverage is a true 360˚ multiaxis activation switch. The switches are connected to a timing circuit so that only a crash, not a hard landing or vibration, will activate the unit. False alarms are therefore eliminated.


  • Flat Black non-infrared reflective finish, aluminum case, night vision compatible.
  • Size: 2.5″W x 2″D x 8.5″H
  • Weight: 2.75 lbs. with battery pack installed
  • Flexible non-telescoping antenna extends 19″ above transmitter body


  • Intended for installation in cockpit or cabin area
  • Recessed 3 position toggle switch
  • 2 year parts and labor warranty
  • Comes complete with mounting bracket, battery pack and aural monitor
  • Uses one GS-52 alkaline battery pack
  • FAA TSO-C91a Approved
  • Shorting Plug on lanyard to disable G-switch
  • Audible Monitor alert when activated
  • Night Vision compatible
  • True 360˚ spherical G-Switch horizontally and vertically


Range Satellite: 1200+ miles
Range Search Aircraft: Line of Sight
Operating Life 120 hours or more @ 21˚C
Operating Temperature -20˚C to +55˚C
Transmit Frequency Both 121.5 MHz and 243.0 MHz
Frequency Stability +/- 0.005%
Shock Resistance Withstands up to 1000 Gs
Waterproof Complete submersion in salt water up to 24 hrs.
Modulation Swept tone 1600 Hz to 300 Hz, 2-4 times per second
Power 50mW PERP after 50 hours @ -20˚C


*Disclaimer: Distress signals on 121.5 or 243.0 Mhz are legal but in 2009 processing of the signals by Search and Rescue personnel was discontinued.