There are a range of pressure testers used in the automotive industry. Each of them are used to provide information about the potential condition of various systems and components.
Scan tools are used to run diagnostic tests on vehicles to obtain information on the probable cause of faults. They are able to communicated with the on-board control computer fitted in a vehicle.
Multimeters are electrical test tools and are used to diagnose problems in vehicle electrical systems, however their use has been reduced with the advent of 'on-board' diagnostics and the use of scan tools.
A test light is a tool for testing circuits. It usually has a light that indicates the presence of an electrical current in the circuit to which it is attached.
A hydrometer is an instrument used for determining the specific gravity of liquids. Common applications of a hydrometer are in battery testing for state of charge and coolant testing for coolant concentrate to water ratio.
