1. Introduction
This manual provides essential information for the proper setup, operation, and maintenance of your TFA Dostmann 30.1042 Digital Freezer-Fridge Thermometer. This device is designed to accurately monitor temperatures in refrigerators and freezers, helping to ensure food safety and optimal appliance performance. It displays current, maximum, and minimum temperatures, and features symbols to indicate whether it is detecting freezer or fridge conditions. The thermometer is EN 13485 compliant, making it suitable for both household and professional use.
2. Safety Information
- Read all instructions carefully before using the device.
- Keep the device away from extreme temperatures, direct sunlight, and moisture.
- Do not immerse the device in water or other liquids.
- Do not attempt to disassemble or repair the device yourself. Refer all servicing to qualified personnel.
- Keep batteries out of reach of children. If swallowed, seek medical attention immediately.
- Dispose of used batteries and the device according to local regulations.
3. Package Contents
Verify that all items are present in the package:
- TFA Dostmann 30.1042 Digital Freezer-Fridge Thermometer
- 1 x CR2032 Battery
- Instruction Manual
4. Key Features
- Digital temperature display for refrigerators and freezers.
- Permanent display of maximum (MAX) and minimum (MIN) recorded temperatures.
- Automatic display of freezer or fridge symbol based on detected temperature.
- Versatile placement options: fold-out stand for freestanding use or self-adhesive frame for mounting.
- EN 13485 compliant for professional applications.
- Integrated alarm function (details on activation not specified in product description).
5. Setup and Installation
5.1 Battery Installation
The thermometer requires one CR2032 button cell battery, which is included. To install or replace the battery:
- Locate the battery compartment cover on the back of the device.
- Open the cover (you may need a small coin or screwdriver).
- Insert the CR2032 battery with the positive (+) side facing up.
- Close the battery compartment cover securely. The display should activate.
5.2 Placement Options
The thermometer offers flexible placement:
- Freestanding: Utilize the integrated fold-out stand on the back of the device to place it on a shelf or flat surface within your refrigerator or freezer.
- Adhesive Mounting: The thermometer comes with a self-adhesive frame. Peel off the protective backing and firmly press the frame onto a clean, dry surface. This allows for attachment to various surfaces, including behind the glass of a vegetable compartment or a refrigerated display case.

Image: TFA Dostmann 30.1042 Digital Freezer-Fridge Thermometer displaying 24.4 degrees Celsius.

Image: TFA Dostmann 30.1042 Digital Freezer-Fridge Thermometer placed inside a refrigerated display case with sausages, showing 5.0 degrees Celsius.
6. Operation
6.1 Display Overview
The digital display shows the following information:
- Current Temperature: The large digits indicate the real-time temperature.
- MAX Temperature: A small '▲' symbol (or similar) next to a temperature reading indicates the highest temperature recorded since the last reset.
- MIN Temperature: A small '▼' symbol (or similar) next to a temperature reading indicates the lowest temperature recorded since the last reset.
- Fridge Symbol: An icon resembling a refrigerator will appear when the measured temperature falls within typical refrigeration ranges.
- Freezer Symbol: An icon resembling a snowflake or freezer will appear when the measured temperature falls within typical freezing ranges.

Image: TFA Dostmann 30.1042 Digital Freezer-Fridge Thermometer with a blue transparent frame, displaying 20.0 degrees Celsius and star symbols.
6.2 Temperature Measurement
The thermometer continuously measures and displays the ambient temperature. Place the thermometer in the desired location within your refrigerator or freezer. Allow approximately 30 minutes for the temperature reading to stabilize.
6.3 Max/Min Temperature Display
The device automatically records and permanently displays the highest and lowest temperatures reached since the last battery installation or manual reset. This feature is useful for identifying if the appliance door was left open or if there was a power interruption affecting cooling.
To reset the MAX/MIN values, remove and reinsert the battery. The device will then begin recording new maximum and minimum temperatures from that point.
7. Maintenance
- Cleaning: Wipe the thermometer clean with a soft, damp cloth. Do not use abrasive cleaners or solvents. Ensure the device is dry before returning it to the refrigerator or freezer.
- Battery Replacement: When the display becomes dim or the device stops functioning, replace the CR2032 battery as described in the "Battery Installation" section.
- Storage: If storing the device for an extended period, remove the battery to prevent leakage.
8. Troubleshooting
- No Display or Dim Display: Check if the battery is correctly installed. Replace the CR2032 battery if it is depleted.
- Inaccurate Readings: Ensure the thermometer is placed in a location away from direct airflow from vents or coils, which can cause localized temperature fluctuations. Allow sufficient time (at least 30 minutes) for the reading to stabilize after placement or opening the appliance door.
- Device Not Responding: Remove the battery, wait a few seconds, and then reinsert it to perform a soft reset. If the issue persists, replace the battery.
9. Specifications
| Feature | Detail |
|---|---|
| Model Number | 30.1042 |
| Measuring Range Temperature | -30°C to +50°C (-22°F to +122°F) |
| Material | Plastic |
| Power Source | 1 x CR2032 Battery (included) |
| Dimensions (L x B x H) | 91 x 15 (35) x 72 mm (3.58 x 0.59 (1.38) x 2.83 inches) |
| Weight | 36 g (0.08 lbs) |
| Display Type | Digital |
| Special Feature | Alarm |
| Compliance | EN 13485 |

Image: A hand holding the TFA Dostmann 30.1042 Digital Freezer-Fridge Thermometer, illustrating its compact size and dimensions.
10. Warranty and Support
For warranty information and technical support, please refer to the documentation provided at the time of purchase or contact your retailer. You may also visit the official TFA Dostmann website for further assistance.





