About the product The brake oil detection pen measures the change in moisture of the brake oil based on the change in conductivity. It clearly shows the degree of moisture content through the LED, and the high moisture content will cause the boiling point to decrease, affecting the braking performance, and also corrode the brake master cylinder and the sub-pump to cause rust and seizure. Red light indicates that the brake oil needs to be replaced immediately, green light indicates good condition, and yellow light indicates that the condition is acceptable, but it is about to be replaced. This product can be used by car 4S shop and owner, the product operation is simple, accurate and fast!
Specification: 1.Size: Approx. 15cm/5.9" 2.Power Supply: 1 x 1.5V "AAA" Battery (Battery not Included) 3.Principle: according to conductivity changes to determine moisture change in brake fluid, with five different color LED indicator Indicator Description: 1.5 LEDs indicating the water % in the brake fluid: 2.0% light indicates that the battery is OK, no replacement 3.1% light indicates that moisture content of brake oil less than 1% , brake fluid has a good performance, and ease of use. 4.2% light indicates that moisture content of brake oil less than 2%, brake fluid can be continued to use 5.3% light indicates that moisture content of brake oil less than 3% , proposed to replace brake fluid. 6.4% light indicates that moisture content of brake oil less than 4%, brake fluid should be replaced immediately. Indicator Package Included: 1 x Brake Fluid Test