---
product_id: 655029440
title: "KAIWEETS Brake Fluid Tester Pen with Corrosion Resistance Probe, High-Precision Brake Fluid Moisture Tester with Data Hold Function, Buzzer Alarm, 3 Colors Backlight, Calibrated for DOT3, DOT4, DOT5.1"
brand: "kaiweets"
price: "141.61 DT"
currency: TND
in_stock: true
reviews_count: 8
category: "Kaiweets"
url: https://www.desertcart.tn/products/655029440-kaiweets-brake-fluid-tester-pen-with-corrosion-resistance-probe-high
store_origin: TN
region: Tunisia
---

# 3-color backlight buzzer alarm ±0.3% precision KAIWEETS Brake Fluid Tester Pen with Corrosion Resistance Probe, High-Precision Brake Fluid Moisture Tester with Data Hold Function, Buzzer Alarm, 3 Colors Backlight, Calibrated for DOT3, DOT4, DOT5.1

**Brand:** kaiweets
**Price:** 141.61 DT
**Availability:** ✅ In Stock

## Summary

> 🚗 Stay Ahead of Brake Failures with Precision & Alerts!

## Quick Answers

- **What is this?** KAIWEETS Brake Fluid Tester Pen with Corrosion Resistance Probe, High-Precision Brake Fluid Moisture Tester with Data Hold Function, Buzzer Alarm, 3 Colors Backlight, Calibrated for DOT3, DOT4, DOT5.1 by kaiweets
- **How much does it cost?** 141.61 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/655029440-kaiweets-brake-fluid-tester-pen-with-corrosion-resistance-probe-high)

## Best For

- kaiweets enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Corrosion-resistant probe and durable polypropylene housing for reliable, long-term use.
- • **Instant Visual Alerts:** 3-color backlight plus buzzer alarm instantly notify you when fluid moisture exceeds safe limits.
- • **Precision You Can Trust:** High-accuracy readings within ±0.3% ensure your brake fluid is always in peak condition.
- • **User-Friendly & Portable:** Compact design powered by common AAA batteries, perfect for on-the-go diagnostics.
- • **Comprehensive Compatibility:** Calibrated for DOT3, DOT4, and DOT5.1 brake fluids to cover all your vehicle needs.

## Overview

The KAIWEETS Brake Fluid Tester Pen offers professional-grade accuracy (±0.3%) with a corrosion-resistant probe and a user-friendly design. Featuring a 3-color backlight and buzzer alarm, it instantly signals when brake fluid moisture exceeds 3%, helping you maintain optimal brake safety. Compatible with DOT3, DOT4, and DOT5.1 fluids, this compact tester runs on AAA batteries and includes a data hold function for easy reading retention. Trusted by mechanics and DIYers alike, it’s backed by a 3-year warranty and lifetime support.

## Description

Buy KAIWEETS Brake Fluid Tester Pen with Corrosion Resistance Probe, High-Precision Brake Fluid Moisture Tester with Data Hold Function, Buzzer Alarm, 3 Colors Backlight, Calibrated for DOT3, DOT4, DOT5.1: Brake Fluid Level - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Great Tool! Functional and Informative - Worked great at checking brake fluid condition on all of my vehicles. Even different grades of fluid. Long, narrow neck made it a lot easier to reach down to and get good fluid contact. Providing both a % saturation and a red/yellow/green indicator makes it easy to use. Great value!
Review: Great tool for under $20 that actually works and gives real results! - Super easy to use giving accurate results that can be read directly from % numbers or green, yellow or red lights! Also gives warning sounds! Bright lights are easy to see in the shop. Durable heavy plastic housing with sealed test probs. Runs on common A batteries. Great value for the money! Don’t guess around with the safety of your brake system! Test your brake fluid and replace when needed! FYI: for testing purposes in the photos I had a drop of water on my finger tip!!!

## Features

- Durable and Corrosion-Resistant : Featuring a corrosion-resistant probe, this brake fluid tester is designed for long-lasting performance. The durable construction ensures that the tool remains effective over time, even with frequent use, making it a reliable addition to your maintenance toolkit
- Fast and Accurate Measurements : This brake system sensor ensures quick and precise readings with an accuracy of ± 0.3%, covering a range of 0% - 4%. Whether you're checking DOT3, DOT4, or DOT5.1 fluids, this device offers reliable results, helping you easily maintain optimal brake performance
- Convenient Features : The brake fluid level sensor includes a data hold function, allowing you to capture and review readings easily. It also features a three-color backlight and buzzer alarm function, which will sound an alarm to remind you to change the brake fluid immediately when the humidity level exceeds the safety limit of 3%, providing additional convenience and safety
- Convenient Power and Operation : With its compact design, this brake fluid tester is easy to carry and store. It operates on 2x1.5V AAA batteries and functions well within a temperature range of 0-40°C. Its user-friendly design and quick measurement capabilities make it an essential tool for both professional mechanics and DIY enthusiasts
- Customer Service : KAIWEETS Provides a 30-day free return and a 3-year warranty for each product. Lifetime technical support, if you have any questions, please feel free to contact us. Enjoy faster and more efficient measurements with this brake fluid tester. Allowing you to promptly address any issues and ensure your vehicle’s braking system is always in top condition

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D9M279V9 |
| Best Sellers Rank | #4,729 in Automotive ( See Top 100 in Automotive ) #1 in Automotive Replacement Brake Fluid Level Sensors |
| Brand | KAIWEETS |
| Brand Name | KAIWEETS |
| Customer Reviews | 4.5 out of 5 stars 578 Reviews |
| Included Components | 1*brake fluid tester 2*AAA battery |
| Item Dimensions | 9.92 x 2.56 x 1.57 inches |
| Item Weight | 40 g |
| Item dimensions L x W x H | 9.92 x 2.56 x 1.57 inches |
| Manufacturer | KAIWEETS |
| Material | Polypropylene |
| Material Type | Polypropylene |
| Measurement Accuracy | ±0.3% |
| Measuring Range | 0% - 4% |
| Model | KVBF01 |
| Number of Items | 1 |
| Output Type | Digital |
| Part Number | KVBF01 |
| Specific Uses For Product | automotive |
| Style | Modern |
| Style Name | Modern |
| Upper Temperature Rating | 40 °C |

## Product Details

- **Brand:** KAIWEETS
- **Item Weight:** 40 g
- **Item dimensions L x W x H:** 9.92 x 2.56 x 1.57 inches
- **Material:** Polypropylene
- **Style:** Modern

## Images

![KAIWEETS Brake Fluid Tester Pen with Corrosion Resistance Probe, High-Precision Brake Fluid Moisture Tester with Data Hold Function, Buzzer Alarm, 3 Colors Backlight, Calibrated for DOT3, DOT4, DOT5.1 - Image 1](https://m.media-amazon.com/images/I/71cQgnW2REL.jpg)
![KAIWEETS Brake Fluid Tester Pen with Corrosion Resistance Probe, High-Precision Brake Fluid Moisture Tester with Data Hold Function, Buzzer Alarm, 3 Colors Backlight, Calibrated for DOT3, DOT4, DOT5.1 - Image 2](https://m.media-amazon.com/images/I/71O5R6dXkEL.jpg)
![KAIWEETS Brake Fluid Tester Pen with Corrosion Resistance Probe, High-Precision Brake Fluid Moisture Tester with Data Hold Function, Buzzer Alarm, 3 Colors Backlight, Calibrated for DOT3, DOT4, DOT5.1 - Image 3](https://m.media-amazon.com/images/I/71QCxG7CwLL.jpg)
![KAIWEETS Brake Fluid Tester Pen with Corrosion Resistance Probe, High-Precision Brake Fluid Moisture Tester with Data Hold Function, Buzzer Alarm, 3 Colors Backlight, Calibrated for DOT3, DOT4, DOT5.1 - Image 4](https://m.media-amazon.com/images/I/71zC7TsQ2ML.jpg)
![KAIWEETS Brake Fluid Tester Pen with Corrosion Resistance Probe, High-Precision Brake Fluid Moisture Tester with Data Hold Function, Buzzer Alarm, 3 Colors Backlight, Calibrated for DOT3, DOT4, DOT5.1 - Image 5](https://m.media-amazon.com/images/I/816I1WYo8qL.jpg)

## Available Options

This product comes in different **Color, Size, Number Of Items** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great Tool! Functional and Informative
*by W***D on July 17, 2026*

Worked great at checking brake fluid condition on all of my vehicles. Even different grades of fluid. Long, narrow neck made it a lot easier to reach down to and get good fluid contact. Providing both a % saturation and a red/yellow/green indicator makes it easy to use. Great value!

### ⭐⭐⭐⭐⭐ Great tool for under $20 that actually works and gives real results!
*by B***S on March 26, 2026*

Super easy to use giving accurate results that can be read directly from % numbers or green, yellow or red lights! Also gives warning sounds! Bright lights are easy to see in the shop. Durable heavy plastic housing with sealed test probs. Runs on common A batteries. Great value for the money! Don’t guess around with the safety of your brake system! Test your brake fluid and replace when needed! FYI: for testing purposes in the photos I had a drop of water on my finger tip!!!

### ⭐⭐⭐⭐⭐ Great buy
*by M***N on June 21, 2026*

I've used for 6 months without any issues! Its very easy to use, appears to be accurate and has worked flawlessly every time!

## Frequently Bought Together

- KAIWEETS Brake Fluid Tester Pen with Corrosion Resistance Probe, High-Precision Brake Fluid Moisture Tester with Data Hold Function, Buzzer Alarm, 3 Colors Backlight, Calibrated for DOT3, DOT4, DOT5.1
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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-08-24*