Indoor Outdoor Thermometer Hygrometer TFA-Dostmann Horizon Black

The TFA-Dostmann Horizon Black is a radio-controlled indoor/outdoor thermometer and hygrometer that displays current indoor climate, outdoor conditions and short-term weather forecasts. It includes an electronic barometer that shows air pressure and a 12-hour pressure history bar chart, a wireless outdoor temperature transmitter (with support for up to two additional transmitters), radio-controlled time and date via DCF77, alarm clock functions with two wake-up alarms and snooze, blue backlight, moon phase and sunrise/sunset times. The device is compact and battery powered, with a black finish suitable for home monitoring.

Advantages

The Horizon provides combined temperature and humidity monitoring for inside and outside areas, a built-in electronic barometer for forecast indications and a 12-hour pressure history to help interpret weather changes. Wireless transmission allows monitoring of remote locations (one transmitter included, two additional optional), while DCF77 time synchronization ensures accurate clock and calendar display. Dual alarms with snooze and a one-button blue backlight add everyday convenience.

Suitable for

• Home indoor climate monitoring (living rooms, bedrooms)
• Outdoor temperature monitoring (garden, balcony)
• Monitoring additional areas such as basements or garages using extra transmitters
• Users who need accurate radio-controlled time and simple alarm functions

Key specifications

• Brand: tfa dostmann
• Model: Horizon Black (MPN 35.1155.01)
• Functions: indoor/outdoor temperature and humidity, barometer, moon phase, sunrise/sunset, clock, dual alarm with snooze
• Temperature range (indoor): 0 to 50 °C
• Temperature range (outdoor): -20 to 60 °C
• Built-in display: Yes
• Power: AAA/AA batteries (battery type as specified by manufacturer)
• Dimensions (W×D×H): 158 × 26 × 123 mm
• Weight: 0.224 kg
• Colour: Black

How to use

Place the main unit indoors on a stable surface or mount it according to the manufacturer’s instructions. Install batteries in the main unit and in the outdoor transmitter, then pair the transmitter(s) with the station following the pairing procedure in the manual. The station receives the DCF77 signal to set time and date automatically; position the unit where reception is reliable. Use the display and buttons to view temperature, humidity, barometric trend and alarm settings. Press the backlight button to illuminate the display.

Recommendations

Position the outdoor transmitter in a shaded, sheltered location out of direct sunlight and heavy precipitation to ensure accurate readings; avoid placing the indoor unit near heat sources or drafts for reliable indoor climate measurements.