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Brake Fluid Tester Pen

Brake Fluid Tester Pen

Regular price £9.00 GBP
Regular price Sale price £9.00 GBP
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Do you want to know if it's time to change your brake fluid? This is your remedy; it also stops you from exposing the brake fluid to the atmosphere for an extended period of time because it is hygroscopic. 


Tester      Instructions: Brake fluid detection pen is based on the change in conductivity to determine the moisture change in brake fluid. It shows clearly the extent of moisture contained by the light-emitting diode; high moisture content will lead to a lower boiling point and affect braking performance. Red indicates the brake fluid needs immediate replacement; green represents good condition; yellow indicates the state is acceptable but soon replaced.


1, the green LED lights = water content in the brake fluid H2O<1.5%, brake fluid qualified

2, the yellow LED lights = brake fluid water content H2O = 1.5% to 3%, can continue to use, test again six months later

3, the red LED lights = water content in the brake fluid H2O> 3%, can not continue to use the brake fluid needs to be replaced

Red LED: change brake fluid

4, LED red flashing: battery replacement

5, LED yellow: low moisture content; check again in six months

6, LED green: brake fluid lines/cell row


Tester      Features:

Five LED indicators show the test results are more accurate.

Testing DOT 3, DOT4, and DOT5 brake fluid

Press the switch to turn on the power and the green LED light that represents the battery properly; the green light does not shine on behalf To replace the battery.

Automatic shutdown



 1, check the car brake oil quality

2,5 LED lights display the percentage of moisture content in brake fluid

3, auto power off

4, 1 LR03 AAA batteries (not included)

Packaging:  A brake fluid tester  

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