TFA Dostmann 30.3249.02 Wireless Temperature and Humidity Transmitter, 433 MHz, 100 m

TFA Dostmann 30.3249.02 Wireless Temperature and Humidity Transmitter, 433 MHz, 100 m

The TFA Dostmann 30.3249.02 is a wireless temperature and relative humidity transmitter with an LCD display, designed for use with compatible TFA wireless weather stations and thermo-hygrometers. It measures ambient temperature and humidity outdoors or in remote indoor areas and transmits the readings to a compatible base station. The integrated display provides local readings, while the 433 MHz wireless link offers a transmission range of up to 100 m in open-field conditions.

Key specifications: –40...+60 °C • 10–99% RH • 433 MHz • up to 100 m • 3 selectable channels • LCD display

Key Features and Benefits

• Temperature and humidity measurement – monitors two essential environmental parameters using a single sensor.
• 433 MHz wireless transmission – sends measurement data to a compatible TFA base station without connecting cables.
• Up to 100 m transmission range – allows flexible placement of the sensor away from the receiving station under open-field conditions.
• Integrated LCD display – shows temperature and relative humidity directly at the sensor.
• Three selectable channels (1/2/3) – supports the use of multiple transmitters with a compatible base station, depending on its channel capacity.
• Wide temperature measuring range – covers temperatures from –40 to +60 °C for outdoor monitoring and indoor climate applications.
• Manual transmission control – the TX button allows wireless data transmission to be initiated manually.
• Replacement transmitter – specified by TFA as a replacement for models 30.3221.02 and 30.3206.02.
• Flexible installation – suitable for freestanding placement or wall mounting.

Applications

The transmitter is designed for monitoring temperature and relative humidity in conjunction with compatible TFA wireless weather stations and thermo-hygrometers.

Typical applications include: - indoor climate monitoring in residential rooms; - temperature and humidity monitoring in garages, utility rooms and remote indoor spaces; - outdoor monitoring in shaded locations protected from precipitation; - replacing or adding a sensor to a compatible TFA wireless weather station.

The built-in display also enables users to check measurements directly at the installation location.

Compatibility and Limitations

Compatible TFA wireless weather stations and thermo-hygrometers specified by the manufacturer:

30.3057.01, 30.3058.01, 35.1129, 35.1139.01, 35.1140.01, 35.1150, 35.1160.01, 35.1161.01, 35.1162.54, 35.1164.02, 35.1097.54, 35.1097.01, 35.1118.01, 35.1162.10, 35.1124.

Replacement for TFA transmitters: 30.3221.02 and 30.3206.02.

Important limitations: - The transmitter is intended for compatible TFA receiving stations. Matching the 433 MHz frequency alone does not ensure interoperability with equipment from other manufacturers. - The maximum 100 m transmission range applies to open-field conditions. Walls, buildings, metal structures and interference may considerably reduce the effective range. - The transmitter is splash-resistant but not waterproof and should not be exposed to continuous moisture. - The number of transmitters that can be used simultaneously depends on the receiving station.

Technical Specifications

Parameter	Specification
Manufacturer	TFA Dostmann
Model	30.3249.02
Product type	Wireless temperature and relative humidity transmitter
Temperature measuring range	–40...+60 °C
Temperature accuracy	±1 °C from 0 to +50 °C; ±1.5 °C outside this interval within the measuring range
Relative humidity measuring range	10–99% RH
Relative humidity accuracy	±5 percentage points RH at 25 °C and 31–84% RH
Data transmission	Wireless radio
Transmission frequency	433 MHz
Maximum transmission range	Up to 100 m in open field
Maximum RF transmission power	<10 mW
Selectable channels	1, 2 or 3
Display	LCD showing temperature and humidity
Controls	TX button and 3-position channel selector
Power supply	2 × 1.5 V AA batteries
Recommended battery type	Alkaline
Housing material	Plastic
Installation	Freestanding or wall-mounted
Housing dimensions according to instruction manual	48 (54) × 26 (44) × 129 (135) mm
Weight	62 g (device only, without batteries)
Conformity	EU Radio Equipment Directive 2014/53/EU (RED)

Note: The stated measurement accuracy applies under the manufacturer's specified conditions. Humidity accuracy outside the 31–84% RH interval is not specified in the instruction manual.

Design and Operation

The LCD displays current temperature and humidity readings, the selected channel, a transmission signal indicator and a battery status symbol.

A TX button allows manual transmission, while a three-position selector in the battery compartment is used to choose channel 1, 2 or 3.

The supplied mounting holder supports both freestanding placement and wall installation.

Important Usage and Safety Notes

• Install the transmitter outdoors only in a shaded location protected from precipitation. Direct sunlight may cause incorrect temperature readings.
• Check wireless reception at the intended installation point before permanently mounting the transmitter.
• Observe battery polarity and do not mix old and new batteries or different battery types.
• After replacing the batteries, the connection to the receiving station may need to be re-established by restarting the devices or initiating a manual transmitter search.
• Do not expose the transmitter to continuous water or moisture.
• Keep batteries and the device out of reach of children.

Package Contents

• TFA Dostmann 30.3249.02 temperature and humidity transmitter with mounting holder.