
Perhaps you are familiar with this scenario: there is a digital decoder sitting on your workbench and you want to test it prior to a perhaps complex installation. But how to do this?
The Profi Decoder tester makes it easy for you: simply connect the tester to your command station or the LokProgrammer. It enables you to test any decoder without exposing it to any external factors caused by the locomotive that may influence its performance.
In order to make things as easy as possible for you, the Profi Decoder Tester is equipped with some useful features. It has all commonly used interface sockets for connecting a decoder for the smaller scale models:
Besides a 6-pole NEM 651 socket and the 8-pole NEM 652 socket, it also has an 21MTC interface as per NEM 660, a PluX22 socket as well as a Next18 interface: No matter which type of decoder you have: Simply plug it in – it will fit! And that’s all there is to it!
Decoders without any interface can be contacted with individual terminals.
A quality coreless motor with flywheel serves in conjunction with LEDs indicating the direction for checking the motor output: Thus it is quite easy to check on the low speed performance and the even speed of the decoder. An LED monitor informs you about the functioning of the headlights and back-up lights as well as the function outputs AUX1 through AUX6.
For testing LokSound decoders we have integrated a 20 mm speaker. You may choose if the integral speaker should be switched off or if it should have 100 Ohm respectively 16 Ohm – thus the Decoder Tester is perfectly suitable for any ESU decoder generation!
Two SUSI plugs facilitate the direct test of optional SUSI modules as well as the connection to another circuit board.
The electrical connection to either the command station or the LokProgrammer is facilitated by a removable, 2-pole terminal block (same system as used on the LokProgrammer and the ECoS) or via two solder points.
The dimensions of the ESU Decoder Tester are 99 x 74 x 34mm.
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Returns | We accept domestic returns within 30 days per Ebay policies, the item must be returned in the condition it was purchased and received. New items purchased must be returned un-opened and un-used condition for new resale. We do not accept product returns from international purchases. |
We can be contacted at any time through eBay messages if you have any questions, comments or product requests. We will respond to you within 24 hours and do our best to help you out! We encourage our customers to contact us with any questions or concerns! We'd like to be sure you are completely satisfied with your purchase.

It also has helped us get through rough times while dealing with being diagnosed on the autism spectrum. Trains and creativity have always helped calm our daily lives while also becoming self-taught on making designs and artwork.
With this our family activity that grew into a really big hobby! We realized local train stores were barely available and we also wanted to start offering other model railroading fans our self-made creations for their enjoyment. We want to help the community around us by providing model railroad supplies and continue the legend of the greatest hobby on earth, model trains and railroading!
Our Squeaky’s Trains designs are handcrafted and custom made by our family. We offer a large variety of items from model train objects to household goods. Most in-house models are 3D printed and custom designed in Blender. We also offer custom features for premade model railroad objects, for example train cabin seating and light holders.
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