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£1,920.00 Incl VAT £1,600.00 Excl VAT
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Offering a simple, affordable replacement for standard Mode C transponder units in aircraft that don’t fly in ADS-B mandated airspace — or that will be equipped with a separate UAT ADS-B transceiver solution — the GTX 325 transponder is a reliable, TSO-certified problem solver. Its solid-state design works to maximize service life and assure dependable ATC traffic surveillance.
Featuring an easy-to-read LCD display designed for optimal viewing in all lighting conditions, GTX 325 offers a number of useful timing and display functions. Timers include trip time, flight time, count-up and count-down, while display functions include readouts for density and pressure altitude as well as static (outside) air temperature. In addition, the altitude monitor function displays the current deviation from the chosen altitude, as well as provides a “leaving altitude” alert when the deviation exceeds the preset limit. Dedicated push buttons numbered 0 through 9 make for quick and easy squawk code entry, while a dedicated VFR button pulls up the VFR code with a single keystroke. Compatibility with the GTN 750 and GTN 650 series of integrated GPS/Nav/Comm systems also enables transponder code selection and control from your navigator’s touchscreen display.
The GTX 325 transponder can also be paired with an optional Garmin altitude encoder to satisfy Mode C data transmission requirements for IFR. The external Garmin altitude encoder mounts separately on the install rack. So, if the transponder ever requires removal, there’s no need for the static line to be disconnected. In turn, that eliminates the need for a follow-on leak check — and thus helps minimize ongoing service costs.
No matter how your aircraft is currently equipped, our GTX 325 offers a simple, all-bases-covered transponder upgrade solution. The standard size and form factor of the 1.65” high unit assures a straightforward replacement for most existing stack-mount transponders — preventing extra avionics rework and installation downtime. See your authorized Garmin installation center for more details on the GTX 325 upgrade for your aircraft.
Physical dimensions (unit, rack, connectors); depth is measured from face of instrument panel: 1.68” x 6.30” x 10.07” (42 x 160 x 256 mm) Display type: Digital Weight (unit, rack, connectors) 2.9 lbs (1.32 kg) Voltage range: 14/28 VDC (14 W max) Transmit power: 200 W minimum Temperature: -40° C to +70° C Operating altitude: To 55,000 ft (16,800 m) Cooling input: Not required Environmental compliance (TSO Approved): DO-160G Software compliance (TSO Approved): DO-178 Levels B, C, D Hardware compliance (TSO Approved): DO-254 Level C; TSO compliance (Approved): TSO-C88b (w/opt. alt. encoder); TSO-C74d Mount type: Panel Transponder type: Mode A/C Squawk code selection: Push-button
Solid state transmitter (more efficient, longer life): yes Aural alerts: yes Total air temperature (TAT): yes Pressure altitude readout: yes Altitude monitor function: yes Density altitude readout: yes Built-in timers: yes Automatic ALT/GND mode: yes Pressure altitude encoder module (mounts to connector backplate): Optional
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