Brake Fluid Tester Pen, High-Precision Alarm Car Oil Liquid Tester with Metal Probe & Screen Display, Heavy Duty Vehicle Brake Fluid Testing Pen for DOT 3 DOT 4 DOT 5.1

Specification:Material: PP, MetalQuantity: 1 PCSColor: BlackWeight: 0.13 lbSize: 6.10 × 1.26 × 0.87 inchesVoltage: 1-1.5 VWorking Temperature: 0-50 ℃Feature: Precise, Compact, PracticalFit Type: Universal FitHow to Use:-Pre-Setup: Open the brake fluid reservoir cap and remove the probe guard. Press the power button; long-press for 3 seconds to set the brake fluid type (hold until the display flashes, short-press to select DOT3/4/5.1, wait 3 seconds to confirm).-Test Procedure: Select the matching DOT3/4/5.1 type. Insert the metal probes horizontally into the brake fluid, ensuring full contact with the fluid surface. Check the water content to assess fluid condition. After testing, it turns off after 1 minute.Product Instructions:-Green screen display: water content less than 1.5% — brake fluid is water-free and safe to use.-Yellow screen display: water content less than 3% — brake fluid performs well but requires frequent inspections.-Red screen display with alert tone: water content between 3% and 4% or higher — brake fluid needs immediate replacement.Notes:-This tester pen requires only one AAA battery for power.-Do not let the metal probe touch any objects when installing the battery.-After each test, wipe the liquid off the metal probe with a dry cloth or paper towel.-Replace the battery if the green LED does not light up after pressing the power button.-Do not expose brake fluid to the air for a long time, as it has strong water-absorbing properties.-If brake fluid comes into contact with your skin, rinse the area thoroughly with water immediately.

• Efficient Measurement: This brake fluid tester efficiently measures the water content percentage range in brake fluid, allowing you to quickly grasp the condition of the fluid. It features a measurement error of less than ±0.3%, delivering highly accurate test results
• Clear Display: With a 3-color screen display, this test pen enables clear, intuitive identification. A green screen means the brake fluid is water-free and safe to use, a yellow screen reminds you to inspect the brake fluid regularly, while a red screen warns that the brake fluid requires immediate replacement
• Premium Material: Crafted with a high-quality PP housing, this brake fluid tester features excellent hardness and wear resistance, ensuring long-lasting durability. Its metal probe provides outstanding corrosion resistance, maintaining a stable and reliable structure during prolonged use
• Thoughtful Design: This test pen features a sturdy clip on the side, allowing you to easily attach it to your collar, pocket, or tool bag for convenient portability. It also automatically shuts off one minute after testing, effectively saving battery power and extending its usage time
• Applicable Scope: This liquid tester pen is widely compatible with DOT 3, DOT 4, and DOT 5.1 brake fluids for various vehicles, including cars, trucks, SUVs, RVs, and vans. Whether for routine self-checks or professional applications, it meets your vehicle brake fluid testing needs