Wireless Thermo-Hygro Sensor TFA ID-A4 (model 30.3905.02) white — temperature and humidity transmitter

TFA ID-A4 (model 30.3905.02) is a white wireless thermo-hygro sensor designed to transmit ambient temperature and relative humidity readings to compatible receivers and weather stations. The compact transmitter housing is suitable for indoor use or sheltered outdoor locations and enables continuous remote monitoring of climatic conditions. It pairs with supported TFA display units and monitoring systems to provide real-time environmental data for home, office, greenhouse or storage spaces.

Advantages

The sensor offers wireless transmission of both temperature and humidity, allowing placement away from the main display unit for more representative readings. Its compact white enclosure supports unobtrusive installation and straightforward integration with compatible weather stations. Low power consumption ensures long battery life, while reliable sensing components maintain stable measurements suitable for monitoring and comparison over time.

Suitable for

• Indoor climate monitoring in living rooms, bedrooms and offices
• Supplementing a weather station with an additional outdoor-sheltered sensor
• Monitoring humidity-sensitive storage areas, cabinets or cellars
• Greenhouse or conservatory environment control when placed in sheltered positions

Key specifications

• Measured parameters: ambient temperature and relative humidity
• Wireless transmission to compatible receivers; typical indoor range depends on environment
• Compact, white plastic housing suitable for wall mounting or placement on flat surfaces
• Battery-powered operation with low power consumption for extended battery life
• Operating placement: indoor or sheltered outdoor locations (avoid direct exposure to rain)

How to use

Install batteries according to the device instructions and place the sensor within the wireless range of the compatible receiver or weather station. Position the unit away from direct heat sources, strong sunlight and direct water exposure to ensure accurate temperature and humidity readings. Follow the pairing procedure of your TFA receiver: typically this involves setting the receiver to search mode and activating the sensor to transmit its ID. After successful pairing, verify readings on the receiver display and relocate the sensor if needed to obtain representative measurements for the monitored area.

Usage recommendations

For accurate and stable data, mount the sensor at typical breathing height for indoor monitoring (about 1.2–1.8 m) and avoid placing it next to heaters, air conditioners or open windows. In sheltered outdoor use, choose a covered location protected from direct rain and sun. Replace batteries when the receiver indicates low power and periodically clean the housing to prevent dust accumulation that could affect humidity readings.