Diesel Injector Nozzle Pop Tester fuel injector nozzle tester with 0 - 400 BAR / 0 - 6000 PSI Dual Scale Gauge BOSCH injector checker is suitable for all common rail injector and mechanical injectors, auxiliary products have compression release valve, it can check the fuel injection conditions of various types of injector quickly and easily. It also can be used with common rail injector 118 solenoid valve tester to test various types of common rail injectors. the injector checker equipped with two different types of tubing. You can freely switch suitable for detecting the injector, it is a good choice to Initial inspection injector working state.