TQ KTX2 – Aircraft transponder Better safe than sorry - with the innovative KTX2

The transponder from the successful KTX2 series from TQ.

The newly developed and certified Mode-S KTX2 aircraft transponder is light, compact and suitable for ADS-B, has low power consumption, an integrated height encoder and a high-quality TFT colour display. As a Class 1 transponder with an operating range of up to 30,000 ft and 250 kt, it is ideal for GA aircrafts and gliders, UL and experimental aircraft, as well as balloons.


ktx2-s v2

As a surveillance radar, the KTX2 transponder code offers the highest possible flight safety for the pilot because it does not only transmit the Squawk and flight level, but also a 24-bit identifier which is uniquely assigned to each aircraft. In addition, the air traffic control unit can specifically interrogate certain transponders and is able to request the altitude information, speed and flight direction. The KTX2 does, hence, contribute significantly to flight safety.  


  • Minimum weight (Standard: approx. 380 g / Stack: approx. 580 g)
  • Compact design (Standard: 63 x 62 x 149 mm / Stack: 158,4 x 41 x 155,8 mm)
  • Mode S, Class 1
  • Intuitive operation
  • High-contrast TFT color display for brilliant legibility
  • Minimal power consumption
  • Integrated height encoder
  • Simplest installation
  • Max. operating height 30,000 ft

The advantages at a glance


  • Intuitive operation - developed by pilots for pilots
  • Better visibility under bright sunlight thanks to transflective display on the stack model
  • For use in multiple aircraft different setups can be saved.
  • Integrated altitude encoder
  • Antenna loop-through - no extra antenna required for any ADS-B In hardware
  • Minimal power consumption
  • Excellent price/performance ratio - made in Germany


Simple, flexible installation


The KTX2 transponder is available in two versions: The standard version for installation in a 57 mm / 2¼” round cut out and the 160 mm / 6¼” stack version. A housing length of only 146.2 mm for Standard format means that the transponder can even be installed quite easily in cockpits with difficult space restrictions. For mobile use, such as during balloon flights, the KTX2 is also available as a portable station - ideally in combination with a KRT2 radio transceiver.


Extras – for all situations


Optional available: Compatible GPS sources in different Certification levels for ADS-B OUT.


Product Selection for KTX2 Transponders


Transponder KTX2-F

Mode-S Transponder KTX2-F 160mm Stack Format


Transponder KTX2-S.V2

Mode-S Transponder KTX2-S.V2 57mm Ø


Transponder KTX2-Basic

Mode-S Transponder 57mm


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