Sensors

Measure Traceably

Without traceable measurements, the numerical values of results will always be questionable and hardly worth the effort, and cost. So, too, making traceable measurements, especially in measurements of consequence (life, limb, property, profit, loss…) is the ONLY way to do a job competently.

It most often pays to get started on the right path to technically sound measurements by beginning with some understanding of the options involved in selecting a temperature measurement device.

Then obtain one that meets the expected conditions and standards, is calibrated and that the calibration is traceable to either a fundamental standard (e.g. the triple point of water) or a national standard.

See our calibration and standards pages for more details on each aspect of sound measurement practice.

Contact Sensors

Contact temperature sensors measure their own temperature.

One infers the temperature of the object to which the sensor is in contact by assuming or knowing that the two are in thermal equilibrium, that is, there is no heat flow between them.

Noncontact Sensors

Noncontact temperatures sensors infer the temperature of an object from which the radiant power is collected and assumed to be emitted (some may be reflected rather than emitted).

Most commercial and scientific noncontact temperature sensors measure the thermal radiant power of the Infrared or Optical radiation that they receive from a known or calculated area on its surface, or a known or calculated volume within it (in those cases where the object is semitransparent within the measuring wavelength passband of the sensor).

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