TL-dif Differential Test Lead

In Stock

The differential test lead offers oscilloscope channels galvanic isolation, allowing safe, accurate measurement between two voltage points where neither is referenced to ground. Can be connected to crankshaft position sensor, CAN bus, electric generator windings, internal circuits of engine control unit.



ROTKEE (Ukraine)

Operating voltage

60 V maximum

Removable lead connector

4 mm “banana”

Output connector


Total length

2.5 m

Operating temperature range

-20 to 80℃


195 g


Video Tutorials

Diagnosing a starting and charging system on Subaru Impreza. Connecting TL-dif test leads to starter and  alternator. (8:38)



Items Included

  • differential test lead - 1 pc
  • replacement red flexible pin lead probe - 1 pc
  • replacement black flexible pin lead probe - 1 pc
  • replacement black alligator clip lead probe – 1pc
TL-dif Differential Test Lead contents delivery

Test Lead Design

The test lead is specially designed for making measurements in internal combustion engines. A soft microphone cable with a dense braided shield is used as a cord. 4 mm "Banana" plugs are used as test probe connectors; BNC is a sensor - oscilloscope connector.

With the help of a standard 4 mm Banana plug you can easily connect/disconnect/change test probes. This plug is compatible with test probes from other manufacturers as well as multimeters. Socket function is marked on the housing end.

If needed, the mini hook lead probe can be replaced by a flexible pin or an alligator clip.

TL-dif Test Lead pinout

The replacement probes are made of a flexible PVC cable. A plunger test hook is ideal for connecting an oscilloscope to automotive wires, connectors, PCB pads and other recessed areas.

When designing the test lead, high emphasis has been placed on a signal cable joint as this junction is damage-prone. Each of these joints includes a circuit board with the test lead’s electronic components. The board not only supports the loads, but also fixes the cable. Such solid joints prevent cable breakdown and increase its durability.

The test lead is compatible with the MT Pro scope as well as any other automotive oscilloscope. It can be connected to any analog channel.


Yes, such probes are available, just add the sensors to the shopping cart and write “for Autoscope IV” in the order comment field. Please note that in the photo, the TL-dif probe is equipped with SP-hook test hooks at the request of the client, but it is supplied with SP-flexpin-M backprobes as standard

TL-dif differential test lead for the automotive labscope Autoscope IV TL-dif differential test lead for the automotive labscope Autoscope IV