YSFER 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

YSFER 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

• 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