Introduction
The Femometer DET-306 is a digital touchless infrared thermometer designed for fast and accurate temperature measurement. It is suitable for use with adults, children, infants, and even objects. This manual provides essential information for the safe and effective operation and maintenance of your thermometer.
Key Features
- 1-Second Fast & High Accuracy: Equipped with a clinically proven high-precision infrared sensor, providing results accurate to 0.1°F/℃ with an accuracy of ±0.4°F/ ±0.2℃.
- Humanized Design & Easy to Use: Features a three-color backlit display for different temperature levels (green, orange, red) and a one-button measurement system. Memory storage function allows for monitoring without disturbing sleep.
- Dual Mode & ℃/℉ Switchable: Measures both body and object temperatures, including surfaces like milk, food, and room temperature. Offers a safe and hygienic non-contact method.
- Ergonomic and Portable: Special ergonomic shape for comfortable handling and a lightweight design (0.19 pounds) for easy portability and storage.
- Included Components: Comes with 1 x Touchless Infrared Thermometer, 1 x User Manual, and 2 x AAA Batteries.

Figure 1: The Femometer DET-306 thermometer, emphasizing its key features such as dual mode for forehead and object temperature, instant 1-second readings, non-contact operation, and the inclusion of LR03 batteries.
Setup
Battery Installation
The Femometer DET-306 thermometer requires 2 AAA batteries, which are included in the package. To install or replace batteries:
- Locate the battery compartment cover on the back of the thermometer.
- Slide the cover off to open the compartment.
- Insert the 2 AAA batteries, ensuring the correct polarity (+ and -) as indicated inside the compartment.
- Replace the battery compartment cover by sliding it back into place until it clicks securely.
Operating Instructions
Taking a Body Temperature (Forehead Mode)
- Power On: Press the power button (⏻) to turn on the thermometer. The display will activate and show all segments during a self-check. After the self-check, the person icon (👤) will appear on the display, indicating it's in body temperature mode.
- Positioning: Aim the thermometer at the center of the forehead, maintaining a distance of 0.3 to 1.2 inches (approximately half the length of a ring finger) from the skin. Ensure there are no obstructions like hair or sweat.
- Measure: Press the "START" button. The thermometer will emit a beep, and the temperature reading will appear on the display within 1 second.
- Reading Interpretation: The backlit display will change color to indicate temperature levels:
- Green: Normal temperature (typically T ≤ 99.1°F).
- Orange: Slightly elevated temperature (typically 99.1°F < T < 100°F).
- Red: Fever (typically T ≥ 100°F). A long beep followed by three short beeps will sound to warn the user of a fever.
- Repeat Measurement: It is recommended to take a second measurement at a 3-second interval for consistency.

Figure 2: Proper distance for taking a forehead temperature reading with the Femometer DET-306.

Figure 3: The three-color backlight indicators on the Femometer DET-306 for different temperature levels.
Taking an Object Temperature (Object Mode)
The thermometer can also measure the temperature of objects, liquids, or rooms.
- Switch Mode: After powering on, press the mode button (house icon 🏠) to switch from body mode to object mode. The house icon will appear on the display.
- Positioning: Aim the thermometer at the object or surface you wish to measure.
- Measure: Press the "START" button. The temperature reading of the object will be displayed.

Figure 4: The dual mode functionality of the Femometer DET-306, illustrating its use for both body and various object temperature measurements.
Switching Temperature Units (℃/℉)
To switch between Celsius (℃) and Fahrenheit (℉):
- With the thermometer powered on, press and hold the mode button (person/house icon) for a few seconds until the unit changes on the display.
Maintenance
Cleaning and Care
- Wipe clean the thermometer with a soft, dry cloth after each use.
- Do not immerse the thermometer in water or any other liquid.
- Avoid using abrasive cleaners or solvents, as they may damage the device.
- Store the thermometer in a cool, dry place away from direct sunlight and extreme temperatures.
Troubleshooting
If you encounter issues with your Femometer DET-306 thermometer, consider the following common solutions:
- Inaccurate Readings: Ensure the thermometer is held at the correct distance (0.3-1.2 inches) from the forehead. Avoid taking measurements immediately after strenuous activity or in extreme environmental conditions. Ensure the sensor is clean.
- No Display/Power Issues: Check if the AAA batteries are correctly installed and have sufficient charge. Replace batteries if necessary.
- Error Messages: Refer to the quick start manual included in the box for specific error codes and their meanings.
- Inconsistent Readings: Take multiple readings and average them. Ensure consistent measurement technique and environmental conditions.
For persistent issues, please contact customer support.
Specifications
| Brand | femometer |
| Model Name | DET-306 |
| Special Feature | 3 Colors Fever Alarm, Fast Reading System, High Accuracy, Non-Contact, Ultra Clear Screen |
| Color | Black |
| Age Range (Description) | Adult & Kid & Baby & Senior & Toddler & Newborn |
| Included Components | 1 x Thermometer, 2 x AAA Batteries, 1x Manual, 1x Quick Guide |
| Outer Material | Acrylonitrile Butadiene Styrene |
| Specification Met | Fda / Ce / Fsa & Hsa Eligible |
| Display Type | Digital |
| Connectivity Technology | Infrared |
| Product Care Instructions | Wipe Clean |
| Unit Count | 1.0 Count |
| Power Source | Battery Powered |
| Number of Batteries | 2 AAA batteries required. (included) |
| Item Length | 6 Inches |
| Upper Temperature Rating | 109.4 Degrees Fahrenheit (Body Mode) |
| Response Time | 1 seconds |
| Reusability | Reusable |
| Resolution | HD Backlit LCD Display |
| Lower Temperature Rating | 93.2 Degrees Fahrenheit (Body Mode) |
| Style | LCD Display |
| Indoor/Outdoor Usage | Indoor |
| UPC | 850032151641 |
| Item Weight | 4.2 ounces |
Warranty and Support
The Femometer DET-306 thermometer comes with a 12-month replacement warranty from the date of purchase. For any inquiries or support, please utilize the 24/7 friendly customer service provided by femometer.
This product is also FSA & HSA Eligible.





