La Crosse Technology WS-7391UD
Cherry Finish Wireless Weather Station

The La Crosse Technology Weather Instruments WS-7391UD is a tall, nicely finished wood weather station with large, easy-to-read displays.  The WS-7391UD has a wireless indoor-outdoor thermometer plus an indoor and outdoor hygrometer. It also has a moon-phase display with tide indication, a weather-forecasting feature with three indicator icons (based on an internal barometer), and a precise atomic clock that sets itself.

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• Atomic clock sets automatically to WWVB radio signal (manual setting is also possible)
• 12/24 hour time display (hour, minute, second)
• Date (calendar) display
• Moon phase display with tide indication
• Weather station displays indoor and outdoor temperature and relative humidity with minimum and maximum recordings and time and date of recording (resettable)
• Temperature indication selectable for either °F or °C
• Three weather-forecasting icons
• Weather tendency indicators
• Indoor comfort level indicator with happy and sad face icons
• One outdoor temperature and humidity transmitter included; additional transmitters are optional and sold separately
• Can receive and display information from up to three outdoor transmitters
• LCD display contrast selectable for 8 different levels
• The WS-7391UD is a tall, wall mount unit.

The weather station's incredibly accurate radio-controlled atomic clock has day/date/time displays. Time can be displayed as 12-hour or 24-hour, and the clock can be optioned to automatically adjust for daylight saving time.

Almost 18 inches tall and over 6 inches wide, the station is black (with dark gray function buttons) in a cherry-finished wood case and is intended for wall mounting only. Its LCD displays are large for easy reading, and the LCD display contrast can be adjusted for any of 8 different levels.

The weather station's weather-forecasting feature senses barometric pressure over time and adjusts the indicator icons to provide accurate forecasts based on pressure trends. Another clever feature of the La Crosse Technology WS-7391UD is an indoor comfort level indicator with happy and sad face icons.

The station keeps a record of the minimum and maximum indoor and outdoor temperatures and humidity it has recorded, and these are available at the push of a button.

Not only will the station operate with up to three remote transmitters, four different transmitters are available. The TX6U reports remote temperature, and has no display of its own. The TX3UP senses remote temperature via a probe for use in pools, spas, etc., and has an LCD display of its own.

The weather station's clock calibrates itself to the world's most accurate clock every night by receiving WWVB radio transmissions. These transmissions contain time information from the U.S. atomic clock source, operated by the U.S. Commerce Department near Boulder, Colorado. The built-in antenna ensures reliable signal reception up to 2000 miles (3200km) from the WWVB transmitter.

Substantial in size with good looks and many convenient features, the WS-7391UD is ideal for larger rooms and offices.

Radio-controlled Time:

The Integral Atomic Clock:

The atomic clock integral to the WS-7391UD maintains its incredible accuracy by automatically tuning into the WWVB radio signal. The built-in antenna ensures reliable signal reception up to 2000 miles (3200km) from the WWVB transmitter. As a result, the clock will calibrate to the atomic clock not only throughout the mainland U.S. but also in much of Canada. You need only insert the batteries, wait until the signal is received, and program the desired additional settings. In locations outside of WWVB range, the clock can be manually set and will provide the high degree of accuracy of any quality quartz clock.

In a nutshell, here's how the the atomic clock works: The clock's antenna is specifically tuned for optimal reception of the 60 kHz time signal. The time signal received on the antenna is demodulated by an onboard receiver, which sends the information to the clock's CMOS microprocessor for decoding. Once your clock has automatically set its time for the first time, it ensures continuing accuracy by automatically tuning into the WWVB radio signal between midnight and 6:00 a.m. As long as your clock is kept within transmitter range, it will continue to display the absolutely precise time, automatically adjusting for summer time/winter time changeovers if the daylight savings time option is ON. Should you move your clock out of transmitter range for an extended period of time, the clock will continue to operate as a highly accurate quartz-controlled clock. Upon re-entering the transmitter range, your clock will correct itself again to the precise WWVB time signal.