• Grounding Tester Pen shown open with its red cap removed, copper probe tips visible
  • Grounding Tester Pen in hand, red indicator lit while testing a grey fabric surface
  • Grounding Tester Pen infographic showing its copper probe, ABS housing, and LED indicator
  • Grounding Tester Pen's red LED lit while testing a black conductive mat
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Grounding Tester Pen

€9,00 EUR
€9,00 EUR
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This pen answers one question: does the conductive surface still conduct at the point you touch? Two copper pins sit a few millimetres apart in the tip. Press them to the fabric and the LED lights if the material bridging them conducts. That is a check on the fabric itself, nothing further along the circuit.

What it checks — and what it does not

The pen checks the conductive surface at the spot you touch it. It does not test your wall socket, and it does not test the cord or the snap connector — the LED lights from the fabric alone, whether or not the cord is plugged in. A complete setup needs a socket tester for the outlet and your own check that the cord is clipped on and seated.

Specification

  • Power: CR1220 coin cell, included
  • Use: local conductivity check on grounding mats, sheets and cords
  • Pocket-sized, no setup required

How to use it

  1. Press both pins of the tip flat against the conductive surface.
  2. Read the indicator. A lit LED means the surface conducts at that point.
  3. Repeat at several points — a far corner, the middle, near the connector — because a worn patch, or one coated by fabric softener residue, can stop conducting while the rest of the panel is fine.

When is it worth checking?

After a wash, or if a sheet has been in use a long time. Washing with fabric softener or whitening detergent coats the silver and is the usual reason a surface stops conducting. Setting up a grounding sheet covers seating the connector.

Does it replace a socket tester?

No. They answer different questions, and neither covers the other. A socket tester tells you whether your wall outlet is properly earthed. This pen tells you whether the fabric still conducts where you touch it. It cannot tell you anything about the socket, the cord or the connector.

The LED lights even with the cord unplugged — is that a fault?

No, that is how it works. The pen carries its own coin cell and completes its circuit between its two pins, through the fabric. It is reading the fabric, not the earth connection, so the cord makes no difference to it.

What if it shows nothing?

Try a different point on the fabric first. If several points read nothing, the conductive layer has most likely been degraded — fabric softener and whitening detergents are the common causes.

Is the battery replaceable?

Yes — it takes a standard CR1220 coin cell, and one is included.

Questions? Read the FAQ

Product features

  • Local conductivity check: press both pins to the conductive surface of a sheet, mat or cord — the LED lights if the material conducts at that point.
  • Catches a degraded surface: washing with softener or whitening detergent coats the silver fibres, and this is how you find out before you have slept on it for weeks.
  • Not a socket tester and not a cord tester: it reads the fabric only, and lights whether or not the cord is plugged in.

Materials and care

  • Housing: durable plastic casing.
  • Battery: one CR1220 coin cell, included and pre-installed. When it eventually needs replacing, slide open the battery compartment cover, insert the new CR1220 with the + side matching the marking inside the compartment, then slide the cover closed.
  • Care: keep dry — avoid submerging or exposing to moisture; wipe with a dry cloth if needed. Store at room temperature, out of direct sunlight, when not in use.
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Product Product subtotal Quantity Price Product subtotal
Grounding Tester Pen shown open with its red cap removed, copper probe tips visible
Grounding Tester PenTGC-PEN
Grounding Tester PenTGC-PEN
€9,00/ea		 €0,00
€9,00/ea €0,00

Common Questions about Grounding

What is earthing and how does it work?

Grounding, or earthing, means connecting to the earth contact of a wall socket. Our products do that through a cord with a built-in ≈91 kΩ ±1% current-limiting safety resistor — only the earth contact, never the live or neutral contacts. We won't promise what it will do for you.

Is it safe to plug a grounding product into a wall socket?

Grounding products connect only to the earth contact of your wall socket — never to the live or neutral contacts, which carry electricity. Every cord has a built-in ≈91 kΩ ±1% current-limiting safety resistor.

Does skin contact affect how grounding works?

Direct skin contact gives the most reliable connection. A thin natural layer such as cotton still conducts; a thick or synthetic one does not.

How do I know my outlet has a working earth connection?

Use a simple socket tester (we stock them in our range) — it plugs directly into your outlet and uses a row of indicator lights to confirm whether the Live, Neutral, and Earth connections are all present and correctly wired. A proper earth connection is required for indoor grounding products to work.

How long does it take to notice a difference from grounding?

People choose grounding bedding for their own reasons. Ask ten people why, and you'll hear ten answers. We won't promise what it will do for you.