How To Make Accurate Measurements With A Handheld Infrared Thermometer

How To Make Accurate Measurements With A Handheld Infrared Thermometer

October 26, 2023

Using a handheld infrared thermometer can be quite straightforward, but it's essential to follow some best practices to ensure accurate measurements. Infrared thermometers are commonly used to measure the surface temperature of objects, making them useful for various applications such as cooking, HVAC maintenance, and industrial processes. Here's a step-by-step guide on how to perform accurate measurements with a handheld infrared thermometer:

Familiarize Yourself with the Thermometer:

  • Read the user manual that comes with your infrared thermometer to understand its features and limitations.
  • Ensure the thermometer is clean and free from any obstructions like dirt or dust, as these can affect accuracy.

Power On the Thermometer:

  • Most handheld infrared thermometers have a power button. Press it to turn on the device.
  • Make sure the batteries are in good condition and have sufficient power for accurate measurements.

Select the Emissivity Setting:

  • Emissivity is a measure of an object's ability to emit infrared energy. Different materials have different emissivity values. You should set the emissivity value on your thermometer to match the material you're measuring. Check the user manual for guidance.
  • Common emissivity values:
  • Most non-reflective materials: 0.95
  • Shiny or reflective surfaces (like metals): 0.1

Aim the Thermometer:

  • Point the thermometer at the object or surface you want to measure from a reasonable distance. Typically, you should be about 12 inches (30 cm) away for accurate readings.

Take the Measurement:

  • Press the trigger button to initiate the measurement. Some thermometers may have a dedicated measurement button.
  • Ensure that the laser pointer (if your thermometer has one) is pointing at the exact spot you want to measure. The thermometer measures the temperature of the area the laser is directed at.
  • Hold the trigger while aiming at the target, and release it to record the temperature.

Consider the Ambient Conditions:

  • Be aware that the surrounding environment can affect measurements. Factors like drafts, humidity, and air temperature can influence readings.

Interpret the Display:

  • Read and record the temperature displayed on the thermometer's screen. Most models will provide a digital readout.

Take Multiple Measurements:

  • For critical applications or when you want the most accurate data, take multiple measurements from various points on the object. This helps to account for any variations in temperature.

Store Your Data:

  • If you need to keep a record of your measurements, some thermometers have data logging capabilities. Check the user manual for instructions on how to use this feature.

Power Off the Thermometer:

  • After you've finished using the infrared thermometer, turn it off to conserve battery life.

Clean and Maintain the Thermometer:

  • Regularly clean the lens and body of the thermometer with a soft, damp cloth. Ensure there is no residue on the lens that could affect measurements.
  • Store the thermometer in a cool, dry place away from direct sunlight and extreme temperatures.

Remember that the accuracy of an infrared thermometer can be affected by various factors, including the distance from the object, the emissivity setting, and the ambient conditions. By following these steps and practicing proper technique, you can obtain more accurate temperature measurements with your handheld infrared thermometer.