Test probe extension Voltcraft MSL-505, 4 mm plug socket, black/red, pair

Voltcraft MSL-505 test probe extension provides a pair of 4 mm plug sockets in black and red designed to extend probe connections for multimeters, test leads and laboratory equipment. The compact adapter lets you convert or lengthen existing measurement leads while preserving reliable contact with standard 4 mm banana plugs. It is intended for use where a short, robust extension or color-coded connection between probes and instruments is required.

Advantages

The two 4 mm plug sockets are color-coded black and red to simplify identification of positive and negative channels. The housings are compact and durable, allowing straightforward handling in bench and field environments. The design maintains solid electrical contact with standard 4 mm plugs, reducing intermittent connections during measurement tasks. The pair format ensures you have both polarities available immediately without additional adapters.

Suitable for

• Extending multimeter or oscilloscope leads
• Connecting measurement probes to test setups in electronics labs
• Field service and on-site troubleshooting where short extensions are needed
• Color-coded channel identification in bench wiring and test fixtures

Key specifications

• Connector type: 4 mm female plug sockets (pair)
• Colors: black and red for polarity identification
• Compatibility: standard 4 mm banana plugs and probes
• Form factor: compact inline adapter for probe extension
• Intended use: electrical measurement and testing applications

How to use

Insert the 4 mm banana plug from your measurement lead or probe into the corresponding colored socket until it seats firmly. Use the black socket for the negative or reference lead and the red socket for the positive lead to maintain conventional polarity. Ensure connections are secure before applying power or taking measurements. For multiple connections, add extensions in series only if secure contact is preserved.

Usage recommendations

Inspect plugs and sockets for dirt or damage before each use to maintain reliable contact. Avoid exposing the connectors to excessive mechanical stress or liquids. Use the color-coded pair to keep test setups organized and to reduce the risk of reversed polarity during measurement.