ADJUSTING GAUGE: Describes a tool used to determine a minute distance between two parts of a brake or carburettor system.
AMMETER: Describes a specialist hand tool used to measure the rate of electrical current flow scaled in amperes.
ANEMOMETER: Describes a specialist instrument that is used to measure the rate of airflow in an engine.
BATTERY DISCHARGE CONTROLLER: Describes a device that triggers a warning indicator when the battery power drops below a certain level.
BATTERY DISCHARGE INDICATOR: Describes an instrument that indicates the percentage of the maximum charge of the battery.
BATTERY TESTER: Describes the voltage meter or hydrometer for checking the state of charge of a battery.
CIRCUIT TESTER: Describes a tool similar to a screwdriver with a light at the end of the handle and a long wire with an alligator clip that indicates when the pointed end touches the hot electric wire. At the same time, the alligator end is clipped to the ground. If there is continuity and power, the light in the handle will glow.
CO METER: Describes a device used to check exhaust gases for carbon monoxide, a high level indicates an over-rich mixture as well as causing pollution.
COMPRESSION GAUGE: Describes the gauge used to test the compression in the engine cylinders.
COMPOUND GAUGE: Describes a type of gauge that can indicate both pressure and vacuum.
COMPRESSION TESTER: Describes a device that is screwed or pushed into the spark plug hole so that when the engine is turned over, it measures the amount of compression in that cylinder.
DISC BRAKE GAUGE: Describes a tool used for measuring the thickness, wear, and score depth on brake discs.
DWELL METER: Describes an instrument that determines the number of degrees the breaker cam rotates while the breaker points are closed.
DEPTH GAUGE: Describes a measuring tool for determining the depth of an item.
DEPTH MICROMETER: Describes a measuring device (micrometer) used for precise measurement of depth.
DYNAMOMETER: Describes an electric or hydraulic machine used to measure the actual engine horsepower output and torque. A chassis dynamometer measures horsepower output at the wheels.
ELECTRODE ADJUSTING TOOL: Describes a specialist gauge for measuring a spark plug gap.
ENDOSCOPE: Describes a specialist instrument used to view the interior of hollow bodywork cavities.
ENGINE COOLANT TEMPERATURE SENSOR (ECT): Describes the thermistor sensor that provides coolant temperature information to the computer. It is used to alter spark advance and EGR flow during warm-up or an overheating condition.
EXTERNAL MICROMETER: Describes a micrometer for measuring outer diameters.
FEELER BLADE: Describes a thin blade of spring steel of an exact thickness used to measure small gaps or clearances between parts. Feeler blades usually come in sets of various thicknesses pinned together at one end to form a feeler gauge.
FEELER GAUGE: Describes a thin strip or blade of hardened steel, ground to an exact thickness, used to check clearances between parts. The thicknesses increase by 0.001 inches.
FLOWMETER: Describes a type of meter that indicates the quantity of liquid passing through it.
FRAME GAUGE: Describes a measuring instrument to determine the misalignment of a car's body.
IGNITION GAUGE: Describes a wire-type feeler gauge used to check gaps on ignition systems.
INFRARED ANALYSER: Describes an instrument used to measure the unburned hydrocarbons, and CO discharged from a vehicle exhaust pipe.
GAUGE: Describes any tool used for measuring clearances, pressures and sizes.
HYDROMETER: Describes a meter designed to determine the weight of a liquid used to test the levels of battery electrolyte and the percentage of coolant in the cooling system.
IGNITION OSCILLOSCOPE: Describes a tool used primarily for measuring ignition tune-ups.
IMPACT SENSOR: Describes an open switch designed to close when an accident occurs severe enough to warrant airbag deployment.
INSIDE CALLIPER: Describes a machinists' calliper used to check inside dimensions.
LEAK DOWN TESTER: Describes an appliance similar to a compression tester, used to apply local pressure to a cylinder, and then measured the level of cylinder pressure lost due to worn piston rings through a defective valve train or blown head gasket.
MACHINISTS' CALLIPER: Describes a measuring tool with two curved arms to take both inside or outside measurement.
MANIFOLD GAUGE SET: Describes a complete testing assembly comprising a high and low side gauge, a test manifold and a set of service or charging hoses that can also be used to discharge refrigerant, evacuate air and moisture as well as charge the air conditioning system with refrigerant.
METER: Describes any device used to measure the quantity of a substance that passes through it.
MICROMETER: Describes a precision measuring tool capable of providing readings accurate to 0.002 mm or 0.0001 of an inch.
OUTSIDE CALLIPER: Describes a machinists' calliper used to check outside dimensions.
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