Introduction
This manual provides instructions for the setup, operation, and maintenance of your TFA Dostmann Thermo-Hygrometer Transmitter, model 30.3209.02. This digital transmitter is designed to work with the TFA Multy wireless weather station (model 35.1134) to measure outdoor temperature and humidity. It features a display for direct readings and transmits data wirelessly to the main station.
1. Setup
1.1 Package Contents
- TFA Dostmann Thermo-Hygrometer Transmitter (Model 30.3209.02)
- Note: 2 x 1.5V AAA batteries are required and not included.
1.2 Battery Installation
- Locate the battery compartment on the back of the transmitter.
- Open the battery compartment cover.
- Insert two (2) 1.5V AAA batteries, ensuring correct polarity (+/-).
- Close the battery compartment cover securely.
Upon successful battery installation, the transmitter's display will activate, showing current temperature and humidity readings.
1.3 Pairing with the Main Weather Station
The transmitter is designed to automatically pair with the TFA Multy wireless weather station (model 35.1134). Ensure your main weather station is powered on and within range.
- Place the transmitter near your main weather station during initial setup.
- The main station will search for available transmitters. The transmitter will send its data wirelessly.
- Up to three transmitters can be connected to the main station. Refer to your main weather station's manual for specific instructions on adding multiple transmitters or selecting channels.
1.4 Placement
For accurate readings and optimal wireless transmission, consider the following placement guidelines:
- Outdoor Use: The transmitter is intended for outdoor climate measurement.
- Protection from Elements: Mount or place the transmitter in an area protected from direct precipitation (rain, snow) and direct sunlight. An overhang, porch, or sheltered wall is ideal.
- Mounting Options: The transmitter can be hung using its integrated hanging hole or placed on a flat surface.
- Wireless Range: The maximum transmission range is up to 80 meters (262 feet) in an open field. Obstacles such as walls, trees, and electronic devices can reduce this range.
- Avoid Interference: Keep the transmitter away from large metal objects, electrical appliances, and other sources of electromagnetic interference.

Image: TFA Dostmann Thermo-Hygrometer Transmitter 30.3209.02. This image shows the front of the white transmitter with its display, indicating temperature and humidity. It is designed for outdoor use and can be hung or placed.
2. Operating Instructions
2.1 Display Information
The transmitter features a small LCD display that shows the current outdoor temperature and humidity readings directly. These readings are also transmitted wirelessly to your main weather station.
2.2 Wireless Transmission
The transmitter continuously measures temperature and humidity and sends this data to the main TFA Multy weather station (35.1134) at regular intervals. Ensure the main station is within the effective transmission range for continuous data reception.
3. Maintenance
3.1 Battery Replacement
When the display on the transmitter or the main weather station indicates low battery, replace the two (2) 1.5V AAA batteries. Follow the battery installation steps outlined in Section 1.2.
- Always replace both batteries at the same time.
- Use new, high-quality alkaline batteries for optimal performance.
- Dispose of old batteries responsibly according to local regulations.
3.2 Cleaning
To clean the transmitter, use a soft, damp cloth. Do not use abrasive cleaners, solvents, or immerse the device in water. Ensure the device is dry before re-exposing it to outdoor conditions.
4. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No display on transmitter. | Batteries are dead or incorrectly inserted. | Replace batteries, ensuring correct polarity. |
| Main station not receiving data from transmitter. |
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| Inaccurate temperature/humidity readings. |
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5. Specifications
- Model Number: 30.3209.02
- Brand: TFA Dostmann
- Product Dimensions (L x W x H): 6.1 x 2.8 x 9.2 cm (2.4 x 1.1 x 3.6 inches)
- Weight: 54 grams (0.12 lbs)
- Material: Plastic
- Power Source: Battery powered (2 x 1.5V AAA batteries, not included)
- Special Features: Wireless transmission, Temperature and Humidity display
- Wireless Range: Up to 80 meters (262 feet) in open field
- Included Components: Thermo-hygroscopic transmitter
- Country of Origin: China
6. Warranty Information
This product comes with a 1-year spare parts availability from the date of purchase. For specific warranty terms and conditions, please refer to the documentation provided with your main TFA Multy weather station or contact TFA Dostmann customer service.
7. Customer Support
For further assistance, technical support, or inquiries regarding your TFA Dostmann Thermo-Hygrometer Transmitter, please visit the official TFA Dostmann website or contact their customer service department. Contact details can typically be found on the manufacturer's website or in the documentation accompanying your main weather station.
You can find more information about TFA Dostmann products at: www.tfa-dostmann.de