POP TESTER: Describes a type of injector testing tool used for measuring pressure and the spray patterns of injectors.
REGULATOR: Describes a device that controls the flow of fluids, pressure, temperature and electrical voltage.
REMOTE BULB: Describes a type of sensing device connected to the expansion valve by a capillary tube that controls the expansion valve.
RESET BUTTON: Describes a switch that returns the configuration of any component to its standard setting.
REVOLUTION COUNTER (RPM): Describes a tachometer whose role is to measure the engine speed in revolutions per minute.
SCREW PITCH GAUGE: Describes a type of measuring tool used to identify different thread sizes.
SIGHTING POINT GAUGE: Describes a technical device used by body repair shops to measure car bodies for misalignment through a sighting pin.
SMOKE METER: Describes an instrument that measures the density of exhaust smoke, particularly in diesel engines
SONOSCOPE: Describes a diagnostic tool used to identify trouble spots such as faulty valves, worn gears and water pumps, bearing knock and malfunctioning gaskets in engines.
SPARK PLUG TESTER: Describes a screwdriver with an integral bulb that lights up if a spark is present when the blade is touched against the outside insulation of the spark plug wire.
SPIRIT LEVEL: Describes the straightforward tool used to test if any surface is level, using a glass tube containing an air bubble, spirit levels are renowned for their accuracy.
SPARK GAP COIL TESTER: Describes a specialist tester that provides a spark gap to provide a comparison for a coil being tested.
SPRING BALANCE: Describes a type of instrument used to measure weight by gauging a spiral spring's elasticity.
STEP FEELER GAUGE: Describes a form of feeler gauge comprising several metal feeler blades where the thickness of the blade increases from one end of the gauge to the other.
STETHOSCOPE: Describes a device similar to that used by doctors that helps the detection of abnormal engine noises.
STRAIGHTEDGE: Describes a rule-type tool without graduation for measuring dimensions.
TACHOMETER: Describes a diagnostic device a mechanic uses to determine idle speed and other carburettor and running settings.
TEST LAMP: Describes a tool consisting of a bulb and sharp probe and a lead with a crocodile clip, used to test powered circuits on 6-24-volt systems.
THROTTLE GAUGE: Describes a specialist tool fitted with calibrated measuring pins used to determine the gap between the throttle and choke.
TIMING LIGHT: Describes a specialist tool based around a stroboscopic unit that will produce flashes of light in unison with the firing of a specific spark plug when connected to the secondary circuit.
TIRE GAUGE: Describes a specialist instrument used to determine the pressure in an inner tube or tire.
TROUBLE-SHOOTING LIGHT: Describes an intense light with a long lead, used in garages to inspect the underside of cars.
VACUUM GAUGE: Describes a type of gauge used to determine the amount of vacuum existing in a chamber.
VISCOSIMETER: Describes a commercial device used to determine the viscosity levels of a given sample of oil. The length of time required for the oil to begin to flow will determine its viscosity.
VOLTAGE REGULATOR: Describes a device that maintains the correct voltage level in a vehicle's electrical system by preventing the circuit voltage from exceeding a predetermined safe value.
VOLTAGE TESTER: Describes a specialist screwdriver used for testing electrical current, fitted with an insulated blade and handle with a bulb inside that will light up if the blade touches a live terminal.
VOLTAGE TRANSFORMER: Describes a simple item of specialist equipment used to increase the voltage supplied to the airbag system to 12 volts in the event of a drop in battery voltage.
VOLTAMMETER: Describes a dual-purpose instrument used to measure both voltage and amperage.
VOLTMETER: Describes an instrument used to measure voltage levels in a given circuit.
WHEEL ALIGNMENT GAUGE: Describes a type of gauge used to measure the distance between the rims of a vehicle's front wheels.
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