TCW Technologies


USW-1 Universal Switch- Airspeed kit



Universal switch airspeed kit (USW-1)  includes an ASW-1 airspeed switch and a Universal Switch-SPDT controller.    This combination of components allows for the switching of electrical loads up to 10 amps and up to 30 volts based on aircraft speed.  The airspeed set point is factory calibrated to 100 knots, however, it may be field adjusted to switch at any speed between 55 and140 knots.  The Universal Switch-SPDT controller provides both a normally open and a normally closed contact for controlling any electrical load up to 10 amps.   This allows electrical loads to either be on or off, above or below the airspeed set point.      The system works with aircraft power systems from 10-30 volts.


(click on picture for a larger view)


Features & Benefits

1) Allows control of electrical loads based on airspeed

2) Controls load either below or above an airspeed set-point

3) Adjustable from 55- 140 knots, factory calibrated to 100 knots

4) Operates from 10-30 Volts, controls up to 10 Amps

5) Provides "squat switch" function for transponder or retracts

6) Sealed design, rated for firewall forward use



Learn more about USW-1 (details, wiring, specifications)


Installation Manuals

We are proud of our products and our installation manuals,  we would like you to take a close look.  Our actual product installation manuals are available here for you to download.   We want you to understand how our products work and how to install them properly.   We are trying to raise the bar on the quality of instruction manuals provided for homebuilt aircraft accessories.

Download the actual product installation manuals :

    Installation Instructions for Universal Switch-Airspeed kit

On-line Ordering: 


 Universal Switch- Airspeed kit

 (includes USW-1 SPDT controller & ASW-1 airspeed switch)    $95     


: A paypal account is not required to order, just  a credit card.



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Copyright © 2007-2017 TCW Technologies, LLC.
Last modified 1-18-2017

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