Stay ahead of brake problems with this brake fluid moisture tester pen—a fast, easy way to check the condition of your motorcycle’s brake fluid before it becomes a safety issue. Moisture in brake fluid can lower the boiling point and hurt braking performance. This compact tester gives you instant, color-coded results so you know when it’s time to flush and replace your fluid.

Why You’ll Want This in Your Tool Kit

• Works with common brake fluid types: Compatible with DOT 3, DOT 4, and DOT 5.1 
• Five-stage accurate measurement: 5 moisture “gears” for a more detailed brake fluid condition check
• Multi-color LED indicator lights: Clear color feedback makes results easy to understand at a glance (green/yellow/orange/red)
• Quick diagnostic results (seconds): Perfect for routine maintenance or pre-ride checks
• Professional-grade accuracy: Reliable readings for home garages or shop use
• Enhanced safety monitoring: Helps warn you when fluid quality is dropping—reducing the risk of brake fade or failure

Specs

• Material: PP
• Power: 1× AAA battery (not included)
• Working current: 4–30mA
• Sleep current: 22uA
• Working voltage: 1–1.5V
• Operating range: 0–50°C
• Auto-sleep: Enters power-saving mode after 10 seconds
• Weight: 36.5g
• Compact & portable: Small enough to keep in a saddlebag or toolbox

How to Use (Quick Instructions)

Preparation:

1. Unscrew the brake fluid reservoir cap.
2. Remove the probe protective cover.
3. Tap the power button—the first (lowest) green light will turn on.

Test:

1. Insert the metal probe end into the brake fluid parallel to the fluid surface, ensuring both probes contact the fluid.
2. Read the brake fluid condition based on the LED color/level shown on the tester.

After:

• The lights shut off automatically after about 10 seconds, and the pen goes into low-power sleep mode.
• Pro tip: Keep it on the bike/vehicle so you can quickly check fluid condition anytime.

What’s Included

• Brake Fluid Moisture Tester Pen (probe cover included)
• Battery not included (requires 1× AAA)

Part Numbers:
Manufacturer Part #: YM-CO2
P/N: N/A