TFA-Dostmann 30.3303.02 temperature transmitter

The TFA-Dostmann 30.3303.02 temperature transmitter measures indoor temperatures from -40 to 60 °C and is designed for use with the WeatherHub gateway (sold separately). The compact white housing (83 × 35 × 129 mm) is powered by a 1.5 V battery and communicates at 868 MHz. With CE certification and at least 90 days of onboard memory, the transmitter enables continuous monitoring of temperature and humidity in different rooms.

Advantages

The transmitter offers remote access to measurements via smartphone when connected to the WeatherHub gateway, adjustable alarm limits with push notifications, and reliable wireless transmission at 868 MHz. Its small footprint and low weight make it easy to place in living rooms, bedrooms, cellars, greenhouses or server rooms. Built-in memory stores at least 90 days of data for retrospective review.

Suitable for

• Remote monitoring of indoor temperature and humidity
• Monitoring multiple rooms (living room, bedroom, cellar, storage)
• Use in conservatories, greenhouses and air-conditioned spaces
• Server rooms and other temperature-sensitive environments

Key specifications

• Model: TFA-Dostmann 30.3303.02
• Temperature range: -40 to 60 °C
• Power supply: 1.5 V battery
• Wireless frequency: 868 MHz
• Memory: at least 90 days
• Dimensions (W × D × H): 83 × 35 × 129 mm
• Colour: White
• Certification: CE
• Requires: WeatherHub gateway (sold separately)

How to use

Install the 1.5 V battery, place the transmitter in the desired indoor location and ensure it is within range of the WeatherHub gateway. Add the sensor to the WeatherHub system following the gateway instructions to enable smartphone access. Set alarm limits in the WeatherHub app or portal; when measured values exceed these limits, push notifications will be sent to the connected smartphone. Use the stored memory to review historical temperature and humidity data for up to 90 days.

Recommendations

Place the transmitter away from direct heat sources, drafts and windows for representative indoor readings. Verify battery status periodically and keep the WeatherHub gateway firmware and app updated to ensure stable connectivity and timely alarms.