“The tracker dog” VS3 is a unique combo instrument for troubleshooting and checking electrical installations. The instrument offers a all new and very precise indentification.

The transmitter communicates with the receiver by radio. It also emits current pulses via the mains that can be detected by the receiver’s current sensor. This enables the identification of the fuse for a specific wall socket. VS3 can be used to locate a voltage-conducting socket and also to distinguish between phase and neutral, even in the case of childproof and earthed sockets. With the transmitter connected to a socket, information is then also provided concerning the phase relationship of a second socket or an appliance relative to the socket to which the transmitter is connected. The phase for the socket to which the transmitter is connected is always “Phase 1”, and the socket or appliance being checked can thus be indicated as “Phase 1”, “Phase 2” or “Phase 3”.

It is also possible to test 30mA RCDs. VS3 shows the tripping time. VS3 can check the function of a 30mA RCD. Press the RCD button and VS3 generates a fault current of 30 mA. The RCD is tripped. The display shows how long the process took. If the RCD does not trip within 300ms, an error message is displayed.

The receiver also works without a transmitter, where it becomes a very sensitive analogue “Volt Stick”. The Sagab by Elma VS3 is supplied with batteries and carrying case.
– Socket tester
– Phase identifier
– Fuse identifier
– RCD tester
Voltage range:
100 - 240 VAC
Frequency range:
45 - 65 Hz
Radio frequency:
869.525 MHz
Max distance 1.2 km line of sight between
transmitter and receiver
Auto power off:
After approx. 1 h
128 x 64 pixels with back light
Work temp:
-10°C to 50°C
Power supply:
Transmitter 2 x 1,5V AA (supplied) / Receiver 2 x 1,5V AA (supplied)
Transmitter CE CAT II 300V / Receiver CE
Complies with Standards:
Transmitter 180 x 60 x 45 mm
Receiver 195 x 60 x 37 mm
Transmitter 200 g / Receiver 210 g