---
product_id: 5090455
title: "351B1 Counterfeit Bill Detector Marker Pen, Made in The USA, 3 Times More Ink, Pocket Size, Fake Money Checker - Money Loss Prevention Tester & Fraud Protection for U.S. Currency (Pack of 1)"
brand: "dri mark"
price: "€ 7.88"
currency: EUR
in_stock: true
reviews_count: 13
category: "Dri Mark"
url: https://www.desertcart.ie/products/5090455-351b1-counterfeit-bill-detector-marker-pen-made-in-the-usa
store_origin: IE
region: Ireland
---

# Instant chemical reaction on US currency 3x more ink for extended use Made in the USA for trusted quality 351B1 Counterfeit Bill Detector Marker Pen, Made in The USA, 3 Times More Ink, Pocket Size, Fake Money Checker - Money Loss Prevention Tester & Fraud Protection for U.S. Currency (Pack of 1)

**Brand:** dri mark
**Price:** € 7.88
**Availability:** ✅ In Stock

## Summary

> 💼 Spot fake bills before they spot you—security in a pen!

## Quick Answers

- **What is this?** 351B1 Counterfeit Bill Detector Marker Pen, Made in The USA, 3 Times More Ink, Pocket Size, Fake Money Checker - Money Loss Prevention Tester & Fraud Protection for U.S. Currency (Pack of 1) by dri mark
- **How much does it cost?** € 7.88 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/5090455-351b1-counterfeit-bill-detector-marker-pen-made-in-the-usa)

## Best For

- dri mark enthusiasts

## Why This Product

- Trusted dri mark brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Trusted & Proven:** Top-rated with 4.7 stars and thousands of users safeguarding their cash.
- • **Pocket-Sized Power:** Carry confidence in your pocket—discreet and always ready.
- • **Triple Ink Capacity:** 3x more ink means fewer replacements and more security checks.
- • **Instant Authenticity Check:** Amber mark = legit; dark mark = suspect—know your money instantly.
- • **Universal Currency Compatibility:** Works flawlessly on all US bills from 1959 onward.

## Overview

The Dri Mark 351B1 Counterfeit Bill Detector Marker Pen is a compact, USA-made tool designed to instantly verify the authenticity of US currency. Featuring chemically sensitive ink that changes color on contact, it offers 3 times more ink than standard markers, ensuring long-lasting use. Compatible with all US bills from 1959 onward, this pocket-sized pen is a trusted choice for professionals aiming to prevent fraud and money loss.

## Description

desertcart.com : Dri Mark 351B1 Counterfeit Bill Detector Marker Pen, Made in The USA, 3 Times More Ink, Pocket Size, Fake Money Checker - Money Loss Prevention Tester & Fraud Protection for U.S. Currency (Pack of 1) : Currency Marker : Office Products

Review: works - Good works
Review: Seems okay to me - I tried it on some of my own money. Seems to be fine. I'm gonna pull out the pen when I get change at Walmart. Instead of them looking at the bills, I'm gonna look at the bills.

## Features

- Simply make a small mark on U.S. currency.
- Chemically sensitive ink works instantly.
- Amber mark passes the test, while a dark brown or black mark means the bill is suspect.
- Works on all new design U.S. currency (1959 and later).

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00006IE9P |
| Best Sellers Rank | #3,948 in Office Products ( See Top 100 in Office Products ) #4 in Counterfeit Bill Detectors |
| Brand | Dri Mark |
| Color | Black |
| Customer Reviews | 4.7 4.7 out of 5 stars (5,164) |
| Date First Available | March 24, 2008 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.48 ounces |
| Item model number | 351B-1 |
| Manufacturer | DRI-MARK PRODUCTS |
| Manufacturer Part Number | 351B1 |
| Material Type | Not Appilcable |
| National Stock Number | 7520-01-386-1621 |
| Number of Items | 1 |
| Product Dimensions | 7.5 x 3.15 x 0.65 inches |
| Size | 1 Pack |

## Images

![351B1 Counterfeit Bill Detector Marker Pen, Made in The USA, 3 Times More Ink, Pocket Size, Fake Money Checker - Money Loss Prevention Tester & Fraud Protection for U.S. Currency (Pack of 1) - Image 1](https://m.media-amazon.com/images/I/71cdU3mIIJL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: How does the Dri Mark Counterfeit Detector Pen work?**
A: The iodine-based ink reacts with starch in fake bills, turning dark. On real U.S. currency (starch-free), the mark stays light.

**Q: Can it detect foreign bills?**
A: Standard pens are for U.S. bills only. Dri Mark’s Universal Pen can check some foreign currencies but not polymer bills.

**Q: Is it effective on old and new bills?**
A: Yes, it works on all U.S. bills since they all use the same cotton-linen paper without starch.

**Q: Can counterfeiters fool the pen?**
A: Advanced fakes using real paper (like bleached bills) may pass. Use UV lights or other tools for better security.

**Q: How long does the pen last?**
A: It lasts long due to a larger ink supply. Keep the cap on tightly and store it cool and dry to maximize life.

## Customer Reviews

### ⭐⭐⭐⭐⭐ works
*by L***Z on November 10, 2025*

Good works

### ⭐⭐⭐⭐⭐ Seems okay to me
*by F***N on December 27, 2025*

I tried it on some of my own money. Seems to be fine. I'm gonna pull out the pen when I get change at Walmart. Instead of them looking at the bills, I'm gonna look at the bills.

### ⭐⭐⭐⭐⭐ Best counterfeit pens
*by J***M on November 26, 2025*

These are the best counterfeit pens!! Accurate quick simple to do!

## Frequently Bought Together

- Dri Mark 351B1 Counterfeit Bill Detector Marker Pen, Made in The USA, 3 Times More Ink, Pocket Size, Fake Money Checker - Money Loss Prevention Tester & Fraud Protection for U.S. Currency (Pack of 1)
- HVM Counterfeit Money Detector Pen (5 Counterfeit Pens) - Money Marker Bill Detector Pen with Upgraded Chisel Tip - Detect Fake Bills, Universal False Currency Checker Pack
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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-15*