Digital Forehead Thermometer Giving Different Temperature Readings

The temporal thermometer is considered to be the most accurate method of measuring body temperature, proving to be more accurate than infrared scanning thermometers. But like any instrument, there are certain circumstances that can cause different temperature readings in forehead thermometers.

Why is Temple Temperature Higher Than Forehead?

Typically, the temperature at the temple is slightly higher than the forehead due to the temporal artery's proximity to the skin's surface. The skin on the forehead is thinner and more exposed to air, which can sometimes result in slightly cooler temperature readings compared to other areas like the temple.

To get the most accurate readings with a forehead thermometer, proper technique is necessary. Holding the scanner too far away from the forehead can result in incorrect temperature measurements. Make sure the thermometer is positioned correctly and close enough to the forehead.

Instances of Different Temperatures

When using a temporal artery thermometer, you should normally be getting reproducible results. These results should be within a few tenths of a degree of each other. However, there are a few instances that can cause inaccuracies.

Here’s what to know about using the temporal artery temperature method:

• Multiple temperatures taken over the same area in rapid succession will ultimately cool the area, causing differences in temperature readings.
• Various environmental factors can affect the accuracy of forehead thermometers. Direct sunlight, radiant heat sources, temperatures below 60°F or higher than 104°F, drafts, sweat, or dirt on the forehead can all cause inaccuracies. Wearing headwear or any head covering can also lead to higher temperature readings due to insulation.
• If the person is sweating, the temperature on the neck behind the ear lobe becomes the overriding temperature. Since this area is not quite as stable as the temporal artery, it can easily be cooled by the thermometer in taking multiple readings. It's important to keep in mind that the probe of the thermometer will be at room temperature, which is about 30 degrees Fahrenheit (17 degrees Celsius) cooler than body temperature.

Temporal artery temperature is the most accurate method of temperature assessment in the world. To ensure accuracy with temporal thermometers, be sure to scan the side of the head that is most exposed when taking your temperature measure. This will likely address your issues of getting different temperature readings.

Master Your Technique: Watch Our Thermometer Tutorial

If you're unsure about the correct way to take a temperature reading, or if the variety of readings is confusing, we've made it simpler for you. Watch our quick tutorial to master accurate temperature readings with your Exergen thermometer! This step-by-step guide will ensure that you're using your thermometer correctly for the most reliable results.

Need Personalized Support?

Despite following the above guidelines, if your readings are still inconsistent, there might be unique factors at play. Still have questions? Reach out to our support team for personalized assistance. Our experts are ready to help you with any inquiries or troubleshooting you may need to ensure accurate temperature measurements every time.

In Closing: Different Temperature Readings 

If you’re getting different readings with your Exergen thermometer, make sure one of the instances mentioned above is not occurring first.

Always clean your thermometer before and after use with cool, soapy water or rubbing alcohol to ensure accurate readings.

You can read our troubleshooting user guide for more information on potential issues or Exergen Thermometer. You can also read more about how temporal thermometers work, including the technology behind Exergen instruments.