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SJ2-C Start Judge

The Start Judge SJ2 is a false start system for track & field to monitor the start of running competitions up to 400 m.


The SJ2 consists of the Start Judge transport cart SJT2 with integrated controller and battery. The transport cart can store the complete system. The sensors SJS2 are mounted on each starting block. The integrated loud speaker system enables the starter to give commands to the athletes. The start tone (simulated start shot) is released through the speaker integrated in the start sensor and the BANG. By this, all runners can hear the start tone at the same time. With a radio push button WTN-PB one can move around and still trigger a false start at any time.

Sports Categories



Control Software for the Start Judge 2 System.

Minimum Display resolution 1280x1024.

Available languages:

English, German, French, Italian, Spanish, Russian, Polish

Available for:

Windows 7, Windows 8, Windows 10, Windows 11 See changes


This is the firmware for the SJS2. This are the sensors of the SJ2 system. Use the SJC2 Software for update the SJS2. The Firmware must be extracted to the data folder (documents\SJC2)

Available languages:


V23.31 See changes

TimeManager USB to Serial

USB driver for TimeManager. Install this driver first, then connect the device.

Available for:

Windows 7, Windows 8, Windows 10, Windows 11

Select language