1. Introduction
The Technoline TX 35 DTH-IT is a wireless outdoor sensor designed to provide accurate temperature and humidity readings. This versatile sensor can be used as a replacement or an additional sensor for various Technoline weather stations, including models WD 9000, WD 4204, WD 4910, WD 9245, WD 4920, and WD 9542. Its robust design allows for both indoor and outdoor placement, transmitting data wirelessly to a compatible base unit.

Figure 1: Technoline TX 35 DTH-IT Wireless Outdoor Sensor
2. Package Contents
Please check the package for the following items:
- 1 x Technoline TX 35 DTH-IT Wireless Outdoor Sensor (White)
Note: 2 x LR06 (AA) batteries are required for operation and are not included in the package. Please purchase them separately.
3. Setup
3.1 Battery Installation
- Locate the battery compartment on the back of the sensor.
- Open the battery compartment cover.
- Insert two (2) LR06 (AA) batteries, ensuring the correct polarity (+ and -) as indicated inside the compartment.
- Close the battery compartment cover securely.
3.2 Sensor Placement
The TX 35 DTH-IT sensor is designed for both indoor and outdoor use. For optimal performance and accurate readings, consider the following:
- Outdoor Placement: Choose a shaded area, away from direct sunlight and heat sources, to prevent inaccurate temperature readings. Ensure it is protected from heavy rain and snow.
- Indoor Placement: Place the sensor in a location where it can accurately measure the ambient temperature and humidity, away from direct drafts, heating vents, or air conditioning units.
- Wireless Range: The sensor operates on an 868 MHz frequency. Place it within the effective wireless range of your compatible Technoline weather station. Obstructions like thick walls, metal structures, or electronic devices can reduce the transmission range.
3.3 Pairing with Weather Station
Once batteries are installed, the sensor will automatically begin transmitting data. Refer to your specific Technoline weather station's user manual for instructions on how to pair or add a new external sensor. Typically, the base station will have a function to search for new sensors, and the TX 35 DTH-IT will be detected and display its readings.
4. Operating
The TX 35 DTH-IT sensor continuously measures temperature and humidity. The current temperature reading is displayed on its integrated LCD screen. This data is also wirelessly transmitted to your compatible Technoline weather station, where it can be viewed alongside other weather data. The sensor operates automatically once powered on and paired.
5. Maintenance
5.1 Battery Replacement
When the battery icon appears on the sensor's display or the readings become intermittent, it is time to replace the batteries. Follow the battery installation steps outlined in Section 3.1. Always replace both batteries at the same time with new LR06 (AA) batteries.
5.2 Cleaning
To clean the sensor, wipe it with a soft, damp cloth. Do not use abrasive cleaners, solvents, or harsh chemicals, as these may damage the casing or internal components. Ensure the sensor is dry before placing it back in its location, especially if used outdoors.
6. Troubleshooting
If you encounter issues with your TX 35 DTH-IT sensor, please refer to the following table:
| Problem | Possible Cause | Solution |
|---|---|---|
| No display on sensor / Sensor not transmitting | Dead or incorrectly installed batteries. | Replace batteries with new LR06 (AA) batteries, ensuring correct polarity. |
| Inaccurate temperature/humidity readings | Sensor exposed to direct sunlight, heat sources, or drafts. | Relocate the sensor to a shaded area or a more stable environment. |
| No signal on weather station | Sensor out of range or signal interference. | Move the sensor closer to the weather station. Reduce obstructions between the sensor and base unit. Check for other electronic devices causing interference. Re-initiate pairing process on the weather station. |
| Sensor display is blank or flickering | Low battery power. | Replace batteries. |
7. Specifications
| Feature | Detail |
|---|---|
| Model Number | TX 35 DTH-IT |
| Dimensions (L x W x H) | 2.12 x 3.82 x 12.83 cm (0.83 x 1.50 x 5.05 inches) |
| Weight | 9.07 grams (0.32 ounces) |
| Power Source | 2 x LR06 (AA) batteries (not included) |
| Connectivity Technology | 868 MHz Wireless |
| Temperature Accuracy | 0.5 °C |
| Color | White |
| Usage | Indoor / Outdoor |
8. Warranty and Support
For product support, technical assistance, or inquiries regarding compatible weather stations, please contact Technoline customer service. While specific spare parts availability information is not provided, Technoline is committed to product quality and customer satisfaction. Please refer to the contact information provided with your original Technoline weather station or visit the official Technoline website for support details.

