???? There are many varieties of infrared temperature sensing devices available today, including configurations designed for flexible and portable handheld use, as well many designed for mounting in a fixed position to serve a dedicated purpose for long periods.

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???? Specifications of portable handheld sensors available to the home user will include ratings of temperature accuracy (usually with measurement uncertainty of ±2 °C/±4 °F) and other parameters.

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???? The distance-to-spot ratio (D:S) is the ratio of the distance to the object and the diameter of the? temperature? measurement area. For instance if the D:S ratio is 12:1, measurement of an object 12 inches (30 cm) away will average the temperature over a 1-inch-diameter (25 mm) area. The sensor may have an adjustable emissivity setting, which can be set to measure the temperature of reflective (shiny) and non-reflective surfaces.

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???? A non-adjustable themometer sometimes can be used to measure the temperature of a shiny surface by applying a non-shiny paint or tape to the surface, if the allowed measurement error is acceptable.

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