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Home > Brake System Diagnostic Tool > Car Diagnostic Tool Portable Brake Fluid Tester Pen With 5 LED Indicator Light
Car Diagnostic Tool Portable Brake Fluid Tester Pen With 5 LED Indicator Light
Car Diagnostic Tool Portable Brake Fluid Tester Pen With 5 LED Indicator Light
Car Diagnostic Tool Portable Brake Fluid Tester Pen With 5 LED Indicator Light
Car Diagnostic Tool Portable Brake Fluid Tester Pen With 5 LED Indicator Light
Car Diagnostic Tool Portable Brake Fluid Tester Pen With 5 LED Indicator Light
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Car Diagnostic Tool Portable Brake Fluid Tester Pen With 5 LED Indicator Light
Car Diagnostic Tool Portable Brake Fluid Tester Pen With 5 LED Indicator Light
Car Diagnostic Tool Portable Brake Fluid Tester Pen With 5 LED Indicator Light
Car Diagnostic Tool Portable Brake Fluid Tester Pen With 5 LED Indicator Light
Car Diagnostic Tool Portable Brake Fluid Tester Pen With 5 LED Indicator Light

Car Diagnostic Tool Portable Brake Fluid Tester Pen With 5 LED Indicator Light

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Product Description

Brake Fluid Tester Pen
Car Diagnostic Tool Portable Brake Fluid Tester Pen With 5 LED Indicator Light
Product Description
Type Automotive Repair Tool
Material High-quality plastic housing
Color Black
Specification Voltage: 1.5V
Scope of application: 0-50C
5 LED display lights the percentage of moisture content in the brake fluid, as the test results are more accurate
Operated by a LR03 AAA 1.5V battery (not included), automatic shutdown after about 15 seconds of inactivity
Use clean water to clean after the test, otherwise the brake fluid may corrode the test pen
Function Check the health status of DOT3, DOT4 car brake fluid, Brake Fluid Tester Pen can be used as a digital brake fluid tester suitable for determining brake fluid quality. It will be safe for your driving
Application Supports DOT3 DOT4 DOT5 brake fluid
Service OEM ODM OBM
Packing Customized+carton box
MOQ 1000
Key Features & Specifications
  • High-Accuracy Diagnosis: Features a 5 LED display panel indicating the precise percentage of moisture content in the brake fluid.
  • Wide Application Compatibility: Designed to check the health status of DOT3, DOT4, and DOT5 automotive brake fluids.
  • Energy Efficient: Powered by a standard LR03 AAA 1.5V battery (not included) with an automatic 15-second shutdown feature to conserve battery life.
  • Reliable Housing: Constructed from a high-quality, durable plastic housing built to withstand garage environments.
  • Easy Maintenance: Simplified cleanup process; simply clean probes with water after test usage to prevent corrosion.
Product Visuals
Brake Fluid Tester Application
Detailed Image Gallery
Detail Gallery 1 Detail Gallery 2 Detail Gallery 3 Detail Gallery 4 Detail Gallery 5 Detail Gallery 6 Detail Gallery 7
Product Options & Diagnostics Overview
Tool Set Reference
Diagnostics Detail
Usage Guide Diagram
Additional Product Info
Frequently Asked Questions (FAQ)
How does the brake fluid tester pen work?
The tester pen measures the change in electrical conductivity to determine the moisture content of the brake fluid. The level of moisture absorbed into the fluid is then displayed via the 5 LED indicator lights.
What do the 5 LED indicator lights represent?
The LEDs indicate the proportion of water in the brake fluid: Green indicates safe level (<1.5%), Yellow indicates caution (1.5% - 3.0%), and Red alerts you that immediate brake fluid replacement is needed (>3.0%).
Which types of brake fluid can this tester pen support?
This tool is highly versatile and supports DOT3, DOT4, and DOT5 brake fluids, making it suitable for checking most standard automotive brake systems.
How do I clean and maintain the tester pen?
After performing each test, clean the test metal pins with clean tap water and wipe dry. This prevents residual corrosive brake fluid from degrading the metal components over time.
Does this diagnostic tool come with a battery?
No, the device is operated using a single LR03 AAA 1.5V battery which is not included in the package. It features an auto-shutdown mode after 15 seconds of inactivity to maximize battery life.
Why is checking brake fluid moisture content important?
Brake fluid is hygroscopic and naturally absorbs moisture from the atmosphere. High moisture content lowers the fluid's boiling point, which can cause vapor lock and severe braking performance degradation or failure.

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