---
product_id: 88167826
title: "OTC 3639 Extra Long Heavy-Duty Circuit Tester"
brand: "otc"
price: "€ 536.06"
currency: EUR
in_stock: true
url: https://www.desertcart.be/products/88167826-otc-3639-extra-long-heavy-duty-circuit-tester
store_origin: BE
region: Belgium
---

# 7-inch probe for deep reach Tests 6V & 12V systems Heavy-duty stainless steel probe OTC 3639 Extra Long Heavy-Duty Circuit Tester

**Brand:** otc
**Price:** € 536.06
**Availability:** ✅ In Stock

## Summary

> ⚡ Test smarter, not harder — reach every circuit with confidence!

## Quick Answers

- **What is this?** OTC 3639 Extra Long Heavy-Duty Circuit Tester by otc
- **How much does it cost?** € 536.06 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/88167826-otc-3639-extra-long-heavy-duty-circuit-tester)

## Best For

- otc enthusiasts

## Why This Product

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

## Key Features

- • **Built to last:** Heavy-duty stainless steel probe with insulated shaft ensures durability and safety.
- • **Stay connected:** Positive soldered clip and molded strain relief guarantee reliable, consistent contact.
- • **Ergonomic precision:** Slim, clear handle with bright replaceable bulb enhances visibility and control.
- • **Power compatibility:** Seamlessly tests both 6-volt and 12-volt systems for versatile diagnostics.
- • **Reach the unreachable:** Extra-long 7-inch probe shank accesses tight, hard-to-reach electrical spots effortlessly.

## Overview

The OTC 3639 Extra Long Heavy-Duty Circuit Tester features a 7-inch stainless steel probe and a 12-foot heavy-duty coil cord, designed for precise testing of 6V and 12V electrical systems. Its ergonomic handle, positive soldered clip, and molded strain relief ensure durability and reliable contact, making it an essential tool for professionals tackling complex electrical diagnostics.

## Description

OTC Extra Long Heavy-Duty Circuit Tester Long 7 inch probe shank allows access to difficult to reach areas for testing electrical circuits and locating shorts grounds and open circuits. It includes a heavy-duty stainless steel probe with insulated shaft and a heavy-duty clip with positive soldered connection. It features a 12 feet foot heavy-duty red coil cord lead, checks 6- and 12-volt systems, ergonomic slim designed clear handle, and a bright red slim style replaceable bulb. Its positive contact-molded strain relief.

## Features

- Long 7 inch probe shank allows access to difficult to reach areas for testing electrical circuits and locating shorts grounds and open circuits
- Includes a heavy-duty stainless steel probe with insulated shaft and a heavy-duty clip with positive soldered connection
- Positive contact-molded strain relief
- International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | OTC |
| Brand | OTC |
| Model | 3639 |
| Product Dimensions | 10.54 x 33.27 x 4.06 cm; 1 g |
| Item model number | 3639 |
| Manufacturer part number | 3639 |
| Item Weight | 1 g |

## Product Details

- **Brand:** OTC
- **Power source:** Battery Powered
- **Style:** Modern
- **Colour:** Red
- **Item weight:** 1 Grams

## Images

![OTC 3639 Extra Long Heavy-Duty Circuit Tester - Image 1](https://m.media-amazon.com/images/I/51uyysqZNzL.jpg)

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**Shop now:** [https://www.desertcart.be/products/88167826-otc-3639-extra-long-heavy-duty-circuit-tester](https://www.desertcart.be/products/88167826-otc-3639-extra-long-heavy-duty-circuit-tester)

---

*Product available on Desertcart Belgium*
*Store origin: BE*
*Last updated: 2026-10-28*