“Radar Contact Established”
20 gram 20W Mode S Transponder


ping20Si is the world’s smallest, lightest, most affordable Mode S ADS-B transponder. At just 20 grams, it allows drone aircraft to respond to Mode S radar interrogations by ATC and TCAS. ping20Si also transmits ADS-B on 1090MHz.  No deviations from the Minimum Performance Standards of DO-181E and DO-260B at 20W nominal output power.  GPS and pressure altitude data are provided by the onboard FYXnav position source and integrated barometer.  No autopilot integration is required.  Simply apply power and program via the ping wireless application.  If autopilot integration is preferred, ping20Si is compatible with many popular autopilots.

ping20Si is NOT approved for use in the United States.
For U.S. applications, see ping200Sr and ping200X


  • Replies to Mode S radar interrogations from ATC and aircraft anti-collision systems

  • Transmits ADS-B on 1090MHz Extended Squitter

  • Meets the performance requirements of TSO-C166b
    Class B1S and TSO-C122e Class 1 Level 2els @ 20W

  • Meets the minimum performance requirements of
    the following RTCA specifications:
    DO-181E Class 1 Level 1els @ 20W
    DO-260B Class B1S @ 20W
  • DO-160G environmental Cat B2

  • Integrated SBAS GPS receiver and antenna

  • Integrated barometer provides pressure altitude

  • SMA Antenna Connector
  • US Patents Pending

ping20Si Documentation:


Specification Value
Input Power 11-28V
1W Ave On/Alt.
0.5W Standby
Size 50x25x17mm
Weight 20 grams
Operating Temperature -45° to 80°C


Specification Value
MTL 1030MHz -61dBm
Dynamic Range -59 to 0dBm


Specification Value
1090MHz 20W Nominal

Supported Interfaces

Specification Value
Host Serial 57600bps (programmable)
Nav Serial 115200bps

HOST Protocol