Review on Calibrated ITEQ Brake Fluid Tester Pen With 5 LED Indicators For Accurate Testing Of DOT3 And DOT4 Brake Fluids by Heath Cullinan

The tester is small and lightweight overall it's 5 stars as it's a handy little tool for quick readings. What I've noticed is that if the probes only slightly touch the fluid as opposed to being completely submerged, the readings are different. For this reason I gave it 4 stars for ease of use since some brake reservoirs are a tight fit for the short probes and as such you can't read the fluid. The tester has been used in a garage for almost 2 years now and no problems other than being unable to reach the fluid in some reservoirs as stated before.