This article discusses temperature measurement differences that you may see based on the method used to take a temperature. 

NOTE: Differences in measurement method, environment, or a user's body can impact a temperature reading. For this reason, a secondary confirmation of an elevated temperature reading is recommended by using a non-contact infrared thermometer or clinical grade contact thermometer



You may receive slight variances in temperature readings if you are comparing temperatures of the Accushield integrated thermometer and a different method. This is normal and can be the result of multiple factors. 

When comparing different types of readings, be mindful of the following: 


  • The average body temp fluctuates

The average body temperature of a healthy person can fluctuate throughout the day from 98.6 °F, +/- 0.9 °F (0.5 °C). Early morning temperatures are lower while late afternoon and evening temperatures are higher. 

  • Measurement readings differ by method used
    A temperature reading depends on which part of the body is being measured and which measurement method is being used. The most accurate temperature measurement is a heart temperature measured by a catheter. Other methods that are considered "core" temperatures and provide different, but very similar results are:
    • Rectal 
    • Oral (can be affected by hot/cold drinks, mouth breathing, and ambient temperature) 
    • Axillary (under the arm) 
    • Temporal artery (TA) 

  • Getting an accurate reading with the Accushield integrated thermometer
    First, the user should remove hat, hair, or anything else covering the forehead for the most accurate reading. The Accushield integrated thermometer uses a contactless infrared sensor to scan a visitor's forehead and smart algorithms to compute body temperature. Based on our testing, the readings are similar to temperatures taken with the temporal artery method. 

  • Confirm an abnormal temperatures
    The Accushield integrated thermometer should be used as an initial temperature measurement and should not be used solely to diagnose or exclude health conditions. When an elevated temperature is recognized, a secondary check using a non-contact infrared thermometer or clinical grade contact thermometer should be done to confirm the initial reading.

For questions or additional support, contact us at or call 800-478-5085, ext. 202.