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PRODUCT NUMBER: THDG986

Non-Contact Infrared Human 

Forehead Thermometer Instructions

MEASUREMENT SETTINGS

BODY TEMPERATURE:

1. Press measurement button to turn on thermometer and display boot screen (Figure 2.1). After POST and two beeps, it will display value of last 

reading and be ready for measurement (Figure 2.2).

2. Make sure the thermometer is set to body mode. 
3. Keep distance 2"–3" (5–8 cm) from the thermometer probe to the middle of the forehead (figure 2.5). Press measurement button and 

thermometer will give a “beep” to indicate measurement is finished and value will be displayed (figure 2.3). If measurement value exceeds 
alarm value (default value is 100.4°F or 38°C), it gives three consecutive “beeps” as indication.

4. After measurement is taken, if the thermometer is idle for 30 seconds, it will display “OFF” (figure 2.4) and give a “beep” before shutting off 

automatically.

NOTICE:

•  Keep the sensor and probe cavity clean before use and after use.
•  To ensure the accuracy of measurement, it is recommended to start measurement ten minutes after carrying the thermometer to a new environment.
•  Wait for 10 minutes to measure body temperature after measuring objects with extremely high or low temperatures.
•  Wait for 5 minutes to start a measurement when a measuring target (object or human) is from an environment with a significant difference in 

temperature.

•  Breezes, water, sweating or cosmetics on forehead may affect measurement. Do not measure body temperature within 30 minutes after 

exercise, bath or meals.

OBJECT TEMPERATURE:

1. Press measurement button to turn on thermometer and display screen (Figure 3.1).
2. Make sure the thermometer is set to object mode. 
3. Keep vertical distance 2"–3" (5–8 cm) from the object to the measurement probe. Press measurement button and thermometer will give a 

“beep” to indicate measurement is finished and value will be displayed (Figure 3.2). If measurement value exceeds alarm value (default value 
is 100.4°F or 38°C), it gives three consecutive “beeps” as indication.

4. After measurement is taken, if the thermometer is idle for 30 seconds, it will display “OFF” (Figure 3.3) and give a “beep” before shutting off 

automatically.

NOTICE:

•  The value under this mode is object surface temperature instead of core temperature.
•  The default value of edinfrared emissivity is 0.95. The reading will deviate from the real temperature because of different emissivity. For 

example, the reading on stainless steel is obviously lower than the real temperature. BE CAUTIOUS FOR SCALDING.

Figure 2.1

Figure 2.5

2–3 in 

(5-8 cm)

Figure 2.2

Figure 2.3

Figure 2.4

Figure 3.3

Figure 3.2

Figure 3.1

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