Appareo Stratus ESGi Transponder And Stratus 3I ADS-B Receiver

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Note: Unit can only be sold for experimental aircraft.

The Stratus ESGi provides a simplified all-in-one box solution for 2020 compliance with a Stratus ESG transponder, as well as a non-certified ADS-B receiver.

Stratus ESG (ADS-B OUT)
  • 1090ES transponder
  • Built-in WAAS GPS
  • GPS Antenna Included
Stratus 3i (ADS-B IN)
  • Non-certified receiver made only for Stratus ESG
  • Backup AHRS
  • Integrated with ForeFlight on iPad
  • Requires connection to Stratus ESG
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WARNING: Cancer and Reproductive Harm -


  • 1090ES (Mode S extended squitter)
  • Built-in WAAS GPS
  • Meets global mandates for ADS-B Out
  • Push-button operation
  • Easy-to-use interface
  • Pressure altitude monitor


  • Bezel Height: 1.69 in. (43 mm)
  • Bezel Width: 6.38 in. (162 mm)
  • Depth: 10.75 in. (273 mm) front of panel to connector backshell
  • Weight: 3.29 lbs. (1.49 kg) including rack and connectors
  • Operating Temperature: -20C to 55C
  • Storage Temperature: -55C to 85C
  • Power Input: 9.0 to 36.0 VDC, 15 W typical
  • Cooling Input: No fan required
  • Environmental Compliance: DO-160G
  • Software Compliance: DO-178B Level C
  • Hardware Compliance: DO-254 Level C
  • Display: OLED
  • Transmitter Power: 310 W

In The Box

  • ESG transponder
  • WAAS GPS antenna
  • Stratus 3I kit
  • Wiring harness.
  • Accessories
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Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Do I still need an altitude encoder with this application? Are all the connectors included? Can you use the existing antenna cable? Is the stratus receiver wireless? Do I need additional accessory to connect to my iPad?

Yes, you still need an altitude encoder. These units come with all the required connector kits. The existing antenna cable should be compatible, but you will want to confirm that it is BNC male to BNC male. The Stratus 2S pairs wirelessly via Bluetooth so no other accessories are required.

Q: Would this pair via Bluetooth with an Avidyne IFD540 or even interface with one to allow the weather to overlay on the display?

No, per Appareo the ESGi unit is not compatible with the Avidyne 540 unit.

Q: I already have the ESG transponder. Can I buy just the Stratus 2i and the cables to convert my ESG to an ESGi?

Yes, part number 11-14857 will provide you with the 2i module, interface cable, power/data cable, and connectors.

Q: Does the Appareo Stratus ESGi transponder have to be installed by an approved dealer or can my A&P do it?

For certified aircraft installations, the unit will need to be purchased and installed by a certified avionics installer. We can only sell this unit for experimental aircraft installations at this time.

Q: Is there any difference between a certified and an experimental unit?

No, but, due to contractual arrangements with the manufacturer, we can only offer the ESGi unit to experimental aircraft operators.

Q: I've read that the Stratus ESG was designed to fit in the same panel opening as the classic KT76A transponder. Does it fit in the same tray as the KT76A or will the tray need to be replaced during installation?

The Stratus needs to be mounted using its own rack. The bezel dimensions are 6.38" wide, by 1.69" in height. The rack to be installed is 6.32" wide, and 1.65" tall.

Q: Can you specify which altitude encoder can be paired with this unit? Does the antennae/cables need to be purchased separate as this will be a whole new unit install to the aircraft? No pre existing transponder. Thank you

We recommend the ACK or Trans-Cal encoders for this set up. This unit will accept either a parallel or RS232 altitude encoder input. A transponder antenna will be required such as a TED (pn: 11-17995) or RAMI (pn: av-22). Coax cables will be required to interface the transponder to your gps antenna (included with esgi) and transponder antennas, and a wiring harness to connect the unit to your aircraft power.

Q: Does the Stratus 2I provide any ADS-B IN data to a Garmin Aera 660? Either hardwired or via Bluetooth?

No, the Stratus 2i is designed for use with the Stratus ESG transponder.

Q: Does the 2i receive dual band IN- to show both traffic and weather?

Yes, it will show both weather and traffic.

Q: Is the ADS-B Out functionality compatible with Fltplan go?

At this time Appareo is not on the list of compatible ADS-B products.

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