---
product_id: 15394899
title: "OTC 3890 Brake Fluid Safety Meter - Compatible with DOT 3/4/5.1 Fluids"
brand: "otc"
price: "11533 kr"
currency: DKK
in_stock: true
category: "Otc"
url: https://www.desertcart.dk/products/15394899-otc-3890-brake-fluid-safety-meter-compatible-with-dot-3
store_origin: DK
region: Denmark
---

# Polarity protection Water detection Under 1 min test OTC 3890 Brake Fluid Safety Meter - Compatible with DOT 3/4/5.1 Fluids

**Brand:** otc
**Price:** 11533 kr
**Availability:** ✅ In Stock

## Summary

> 🚗 Safety at Your Fingertips: Because Your Brakes Deserve the Best!

## Quick Answers

- **What is this?** OTC 3890 Brake Fluid Safety Meter - Compatible with DOT 3/4/5.1 Fluids by otc
- **How much does it cost?** 11533 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/15394899-otc-3890-brake-fluid-safety-meter-compatible-with-dot-3)

## 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

- • **Safety First:** Automatically prevents operation with incorrect polarity.
- • **Corrosion Prevention:** Detects water contamination to protect your system.
- • **No Consumables Needed:** Eco-friendly design with no test strips required.
- • **Universal Compatibility:** Works seamlessly with DOT 3, 4, and 5.1 fluids.
- • **Quick & Efficient Testing:** Check brake fluid condition in under a minute!

## Overview

The 3890 Brake Fluid Safety Meter is a cutting-edge tool designed to quickly assess the condition of your brake fluid in under a minute. It effectively detects water contamination, which can lead to corrosion and performance issues, ensuring your braking system remains safe and reliable. Compatible with DOT 3, 4, and 5.1 fluids, this device operates without the need for consumable test strips and features built-in polarity protection for added safety.

## Description

Check condition of brake fluid in less than a minute. Water can enter a brake system though microscopic holes anywhere in the system. Once inside, it can cause corrosion in system components and it can vaporize under the high heat conditions of hard braking situations. It can cause dangerous degradation of your customer's ability to stop safely. It can diagnose a brake system in under a minute. It actually boils a small sample of brake fluid in the reservoir to test for water contamination. Features powered by the vehicle battery and will not operate if connected to the wrong polarity, on-screen prompts lead you quickly through testing, find the minimum boiling (vaporizing) point along with minimum recommended levels for various types of brake fluid, works on DOT 3 4 and 5.1 fluids and uses no consumable test strips.

## Features

- Check condition of brake fluid in less than a minute
- Water can cause corrosion in system components and can vaporize under the high heat conditions of hard braking situations
- Boils a small sample of brake fluid in the reservoir to test for water contamination
- Will not operate if connected to the wrong polarity
- Works on DOT 3 4 and 5.1 fluids and uses no consumable test strips

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000F5HULC |
| Best Sellers Rank | #983,837 in Automotive ( See Top 100 in Automotive ) #189 in Brake Fluids |
| Brand Name | OTC |
| Customer Reviews | 4.7 4.7 out of 5 stars (6) |
| Global Trade Identification Number | 00731413036675 |
| Included Components | Item |
| Item Dimensions | 13 x 10 x 4 inches |
| Item Highlight | On-Screen Prompts Lead You Quickly Through Testing to Find Minimum Boiling Point and Fluid Levels |
| Item Weight | 1.1 pounds |
| Manufacturer | OTC |
| Material Type | Plastic, Rubber, Stainless Steel |
| Model | 3890 |
| Number of Items | 1 |
| Part Number | 3890 |
| UPC | 731413036675 |
| Unit Count | 1 Count |
| Warranty Description | 3 yr warranty on material and workmanship |

## Product Details

- **Brand:** OTC
- **Item Highlight:** On-Screen Prompts Lead You Quickly Through Testing to Find Minimum Boiling Point and Fluid Levels
- **Item Weight:** 1.1 pounds
- **Item dimensions L x W x H:** 13 x 10 x 4 inches
- **Material:** Plastic, Rubber, Stainless Steel

## Images

![OTC 3890 Brake Fluid Safety Meter - Compatible with DOT 3/4/5.1 Fluids - Image 1](https://m.media-amazon.com/images/I/71hplDZ4KaL.jpg)

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**Shop now:** [https://www.desertcart.dk/products/15394899-otc-3890-brake-fluid-safety-meter-compatible-with-dot-3](https://www.desertcart.dk/products/15394899-otc-3890-brake-fluid-safety-meter-compatible-with-dot-3)

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-10-29*