Thermometers
Infrared thermometers measure from a distance, so they are fast on brake discs and exhausts. Do not point them at bare metal, as that gives a false reading through reflection. Choose a model with a stainless steel probe for liquids or air. These units hang on a hook in the workshop. The range often runs from -50 °C to +500 °C, which fits engine work.
Thermometers for the workshop
What it is
A thermometer measures temperature where you cannot or will not reach. An infrared thermometer works at a distance, so you aim and read straight away. For fluids and surfaces where you want real contact, choose a model with a stainless steel probe.
When you choose it
Use it on brake discs, exhausts and cooling circuits. For air conditioning and climate checks, a thermometer often sits alongside air conditioning test devices. If you are unsure about the electrical side of a measurement, reach for multimeters and voltage testers.
Where it goes wrong
Bare metal does not read reliably with infrared, because reflection gives a false value. Measure on a matt spot or use a probe. Everything you measure and test sits in test devices.