La Crosse Technology TX9U Instruction Manual

TX9U Temperature/ Humidity Sensor 

The TX9U temperature/humidity sensor is used in conjunction with the TX15U rain sensor to gather and transmit information to your 

wireless weather station.  The TX9U temperature/humidity sensor measures the outdoor temperature and humidity.  This sensor also 

transmits all outdoor weather information from the TX15U rain sensor to the display indoors. 

INVENTORY OF CONTENTS 

1.  TX9U Remote temperature/humidity sensor 

2. Mounting 

bracket 

3. Mounting 

hardware 

4.  Instruction manual and warranty card 

QUICK SET-UP GUIDE 

Hint: Use good quality Alkaline Batteries and avoid rechargeable batteries. 

1.  Have the indoor weather station, remote temperature/humidity sensor and wind speed sensor 3 to 5 feet apart. 

2.  Insert the telephone plug (RJ-11) from the wind speed sensor into the receptacle on the remote temperature/humidity 

sensor. 

3.  Batteries should be out of both the indoor weather station and remote temperature/humidity sensor units for 10 minutes. 

4.  Place the batteries into the remote temperature/humidity sensor first then into the indoor weather station. 

5.  DO NOT PRESS ANY BUTTONS FOR 15 MINUTES. 

In this time the indoor weather station and remote temperature/humidity sensor will start to talk to each other and the display will 

show the indoor temperature/humidity, outdoor temperature/humidity and wind speed.  If the indoor weather station does not display 

all information after the 15 minutes please retry the set up as stated above.  After all information has been displayed for 15 minutes 

you can place your sensors outdoors and set your time. 

Important Notes on Set-up and Operation 

•  The remote temperature/humidity sensor is both the source of power for both outdoor sensors and source of transmission for 

all remote sensor data.   

•  The remote temperature/humidity sensor should be placed in a dry, shaded area.   

•  Fog and mist will not harm your remote temperature/humidity sensor but direct rain must be avoided.   

•  Direct rainfall will not harm the wind speed sensor. 

•  The remote temperature/humidity sensor has a range of 300 feet.  Any walls that the signal will have to pass through will 

reduce distance.  An outdoor wall or window can have up to 30 feet of resistance and an interior wall can have up to 20 feet 

of resistance.  Your distance plus resistance should not exceed 300 ft. in a straight line. 

•  The remote temperature/humidity sensor transmits a signal every minute.  After the batteries have been installed, the indoor 

weather station will search for the signal for a duration of 15 minutes.  If there is no temperature or humidity reading in the 

OUTDOOR LCD or wind speed in the WIND SPEED LCD after 15 minutes, make sure the units are within range of each 

other, or repeat the battery installation procedure. 

•  If a button is pressed before the indoor weather station receives the signal from the remote temperature/humidity sensor, you 

will need to follow the battery installation procedure again. 

To complete the set up of your new wireless weather station after the 15 minutes have passed please follow the steps that follow in the 

Detailed Set-Up Guide.