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TX4U Outdoor Temperature/Humidity Sensor

TX4U Outdoor Temperature/Humidity Sensor 

 

Rain 
Protector

 

Battery 
compartment 

 

The TX4U outdoor temperature/humidity sensor can be 
added to your existing units in operation. The outdoor 
temperature/humidity sensor measures the outdoor 
temperature and humidity (or any other location you wish 
to know the temperature and humidity) and transmits the 
data to the indoor display station.   
 
 
 
 
 
 
 
 
 
 

 
 
INVENTORY OF CONTENTS 

 
1. Outdoor 

temperature/humidity sensor 

2. Mounting 

bracket. 

3. Rain 

protector 

4.  Two each, ½” Philips mounting screws. 
5.  One strip double sided adhesive tape. 
6.  Instruction manual and warranty return card. 
 

ADDITIONAL EQUIPMENT 

(not included) 

 
1.  One Philips screwdriver. 
2.  One Flat screwdriver. 
3.  Two fresh AA 1.5V batteries. 
 

I.   SETTING UP

 

 
Before you begin, assign a number to each outdoor 
temperature/humidity sensor (i.e.  #1 for outdoors, #2 for 
the basement, etc.) if you have multiple sensors.  This will 
help you determine which temperature, from which 
outdoor temperature/humidity sensor, you are reading on 
the indoor display station. 
 

Note:

  Remove batteries from all existing units in 

operation—including outdoor temperature/humidity 
sensor units and indoor display stations.  When setting up 
multiple units it is important to insert batteries 

first

 into all 

the outdoor temperature/humidity sensors, and in numeric 
sequence.  

Second 

install batteries into the indoor 

display station.  Transmission problems will arise if this is 

not done correctly and if the total time for setup exceeds 
6 minutes.   

II. MOUNTING 

 

 

A. BATTERY 

INSTALLATION 

Note:

  The sending range of the outdoor 

temperature/humidity sensor is 80 ft.  However, 
obstacles such as walls, concrete, and large 
metal objects can reduce the range. Before 
permanently mounting, place units in their 
desired location to see if a reading is obtained. 
There should be a change of temperature in the 
OUTDOOR LCD within 6 minutes. If the indoor 
display station loses the signal from the outdoor 
temperature/humidity sensor, it will display the 
last temperature reading for 15 minutes.  After 
15 minutes of not receiving any signals the 
OUTDOOR LCD of the indoor display station will 
display “- -. –”. 

 
Follow these directions when first setting up, 
when replacing batteries, or for resetting 
purposes.

 

 
1.  Remove the batteries from all existing units 

in operation. 

2.  Remove the battery covers to all outdoor 

temperature/humidity sensors.  Simply slide 
the battery cover down to remove. 

3.  Place outdoor temperature/humidity sensors 

in sequential order.  

 

 
 
 
 
 
 

Mounting 
Bracket 

Battery cover 

Complete  
TX4U

 

Outdoor 
temperature/humidity 
sensor 

 
The outdoor temperature/humidity sensor can be 
mounted in two ways: 

• 

with the use of screws or, 

• 

using the adhesive tape. 

 

 

A.  MOUNTING WITH THE SCREWS 

 

 

 

1.  Remove the mounting bracket from 

the outdoor temperature/humidity 
sensor. 

Note:

  Outdoor temperature/humidity sensors 

will not usually read the same temperature. This 
is due to variants such as drafts and handling.  
This is normal. 

2.  Place mounting bracket over 

desired location. Through the 3 
screw holes of the bracket, mark 
the mounting surface with a pencil. 

 
1.  Observe the correct polarity and install 2 AA 

alkaline batteries in each unit in sequential 
order. The batteries will fit tightly—make 
sure they do not spring free. This may 
cause start-up problems. 

3.  Where marked, drill holes into 

mounting surface using an 
appropriate size drill bit. 

4.  Screw mounting bracket onto the 

mounting surface. Ensure that the 
screws are flush with the bracket. 

2.  Replace the battery cover, rain protector, 

and mounting brackets. 

3.  Observing the correct polarity, install 

batteries into the indoor display station 
(refer to the indoor display station’s 
manual). Replace battery cover. 

5.  Snap the outdoor 

temperature/humidity sensor into 
place on the mounting bracket. 

 

4.  Wait 5-6 minutes or until both indoor and 

outdoor temperature and humidity are 
shown on the LCD of the indoor display 
station. 

B.  MOUNTING WITH ADHESIVE TAPE 

 

 

 

1.  With a nonabrasive solution, clean 

and dry the back of the mounting 
bracket and the mounting surface 
to ensure a secure hold. The 
mounting surface should be 
smooth and flat. 

5.  Refer to indoor display station’s instruction 

manual for more specific details. 

 
 
 
 

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