2UUL MT01 Multimeter Pens

A worn probe with a blunt tip or a frayed lead turns every reading into a guess, especially on the tiny test points of a phone board. Replacing the pens is the cheapest way to make a multimeter trustworthy again.

The MT01 is a set of multimeter pens from 2UUL. The listing describes sharp precision tips, insulated handles and color-coded leads, typically red for positive and black for negative, for measuring voltage, current, resistance and continuity.

When new probes are needed

• Bent, blunt or broken tips that slip off test points.

• Damaged insulation or cracked handles.

• Readings that flicker when you move the lead.

• A meter that came with bulky probes unsuited to board work.

Check the plugs

The listing says the pens fit standard multimeters but doesn't state the plug type or rating. Compare the photos with your meter's sockets before ordering.

Use the meter as the listing advises: set the right range, power down and discharge the device first where needed, and keep your fingers off the metal tips. On a phone board, a quick continuity check on a known ground confirms the leads are sound before you start chasing a fault. Store the pens dry and cap the tips so they stay sharp.