1. Introduction
Thank you for choosing the NUK 4-in-1 Baby Thermometer. This device is designed for accurate and gentle temperature measurement for infants and children. It offers four measurement modes: auricular (ear), frontal (forehead), room, and surface temperature. Please read this manual carefully before first use to ensure proper operation and safety.

Image 1: The NUK 4-in-1 Baby Thermometer with its base.
2. Safety Information
- This thermometer is not a substitute for a medical examination by a doctor. Always consult a healthcare professional if you have concerns about your child's health.
- Keep the device out of reach of children. Small parts could be swallowed.
- Do not expose the thermometer to direct sunlight, high temperatures, or extreme humidity.
- Do not drop the device or subject it to strong shocks.
- Only use the thermometer for its intended purpose as described in this manual.
- The device is waterproof, but do not immerse it in water for extended periods.
3. Product Features
- 4-in-1 Measurement: Measures auricular (ear), frontal (forehead), room, and surface temperatures.
- Fast Auricular Measurement: Provides results in approximately one second.
- Gentle Frontal Measurement: Takes 5 to 8 seconds, suitable for use while a baby sleeps.
- LED Fever Indicator: Visual alert for elevated temperatures during frontal measurement.
- Memory Function: Stores previous temperature readings to track changes.
- Integrated Battery: Lithium CR2032 battery provides approximately 3000 measurements.
- Includes Base: Allows the thermometer to stand upright for stable room temperature measurement.
4. Setup
4.1 Battery Installation
The NUK 4-in-1 Baby Thermometer comes with an integrated CR2032 lithium battery, ready for immediate use. The battery provides power for approximately 3000 measurements. When the battery level is low, a 'LOW' indicator will appear on the display. To replace the battery:
- Locate the battery compartment cover, usually on the back or bottom of the device.
- Use a small screwdriver or coin to open the compartment.
- Remove the old CR2032 battery and insert a new one, ensuring correct polarity (+/-).
- Close the battery compartment securely.
4.2 Initial Power On
Press the power button to turn on the thermometer. The device will perform a self-test, and the last measured temperature will be displayed briefly before it enters standby mode, ready for a new measurement.
5. Operating Instructions
The thermometer features a power button and a scan button. Pressing the power button turns the device on/off. Pressing the scan button initiates a measurement in the selected mode.
5.1 Mode Selection
To switch between measurement modes (auricular, frontal, room, surface), press and hold the power button and the scan button simultaneously until the desired mode icon appears on the display.
5.2 Auricular (Ear) Temperature Measurement
- Ensure the thermometer is in auricular mode.
- Gently insert the probe into the ear canal.
- Press the scan button. The measurement will be completed in approximately one second.
- Remove the thermometer and read the temperature on the LED display.
5.3 Frontal (Forehead) Temperature Measurement
- Ensure the thermometer is in frontal mode.
- Place the probe gently on the temple area of the forehead.
- Press the scan button. Hold the thermometer steady for 5 to 8 seconds.
- The result will appear on the digital display in °C or °F. An LED indicator will signal a fever (e.g., red light). This function can be used without disturbing a sleeping baby.
5.4 Room Temperature Measurement
- Ensure the thermometer is in room temperature mode.
- Place the thermometer on its base in the desired room.
- The device will continuously display the ambient room temperature.
5.5 Surface Temperature Measurement
This mode is useful for measuring the temperature of objects or liquids, such as baby milk, food, or bath water.
- Ensure the thermometer is in surface temperature mode.
- Point the probe towards the surface of the object or liquid you wish to measure.
- Press the scan button. The temperature will be displayed.
6. Memory Function
The NUK 4-in-1 Baby Thermometer stores previous temperature readings, allowing you to monitor temperature trends. To access the memory:
- With the device turned off, press and hold the scan button for a few seconds.
- The last measurement will be displayed. Continue pressing the scan button to cycle through previous readings.
7. Care and Maintenance
- Cleaning: After each use, especially for auricular and frontal measurements, clean the probe with an alcohol swab or a soft cloth dampened with disinfectant. Do not use abrasive cleaning agents.
- Storage: Store the thermometer in a clean, dry place at room temperature, away from direct sunlight and extreme temperatures.
- Waterproof: The device is waterproof, but avoid prolonged immersion in water.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not turn on | Battery is depleted or incorrectly inserted. | Replace the CR2032 battery, ensuring correct polarity. |
| Inaccurate readings | Improper measurement technique, dirty probe, or device not acclimatized to room temperature. | Ensure correct measurement technique for the chosen mode. Clean the probe. Allow the thermometer to sit in the room for 30 minutes before use. |
| "LOW" displayed on screen | Battery is low. | Replace the CR2032 battery. |
| Error message (e.g., "ERR") | Device malfunction or measurement outside operating range. | Turn the device off and on again. If the error persists, contact customer support. |
9. Specifications
| Feature | Detail |
|---|---|
| Brand | Nuk |
| Model Number | 80800686 |
| Special Feature | Waterproof |
| Color | Blue |
| Age Range (Description) | Baby |
| Included Components | Battery |
| Exterior Material | Plastic |
| Display Type | LED |
| Care Instructions | Clean |
| Power Source | Battery Powered |
| Upper Temperature Rating | 42.5 Degrees Celsius |
| Response Time | 8 seconds (Frontal) |
| Reusability | Rechargeable (Battery) |
| Usage | Indoor |
| Resolution | 0.1 degrees Celsius |
10. Warranty
This NUK 4-in-1 Baby Thermometer comes with a 24-month warranty from the date of purchase. Please retain your proof of purchase for any warranty claims. The warranty covers manufacturing defects but does not cover damage caused by improper use, accidents, or unauthorized modifications.
11. Support
If you have any questions, concerns, or require technical assistance with your NUK 4-in-1 Baby Thermometer, please contact NUK customer support. Refer to the packaging or the official NUK website for the most up-to-date contact information in your region.