User's Manual

Receiver model: WH2642
Sensor model: WH22B
Version 1.0 Page 14
The sensor can also be hung from a nylon zip tie (included) or string (not included).
Figure 12
3.6 Indoor Thermo-Hygrometer-Barometer Transmitter
The indoor thermometer, hygrometer and barometer measures and displays the indoor temperature,
humidity and pressure and transmits this data to the ObserverIP receiver.
Note: Do not install the thermo-hygrometer-barometer transmitter outside. This will cause errors
in the barometric pressure due to large variations in temperature (barometric pressure is temperature
compensated for accuracy). Note that pressure readings made inside your home, business, or facility
will correspond closely to the actual barometric pressure outside.
Note: The thermo-hygrometer-transmitter transmits directly to the ObserverIP receiver. For best
results, place between 5 to 20 feet from the ObserverIP receiver.
Note: To avoid permanent damage, please take note of the battery polarity before inserting the
batteries.
Remove the battery door on the back of the sensor by sliding off the battery door. Insert two AA
batteries as shown in Figure 10, and close the battery door. Note that the temperature, humidity and
barometer will be displayed on the LCD display.
3.7 Best Practices for Wireless Communication
Note: To insure proper communication, mount the remote sensor(s) upright on a vertical surface,
such as a wall. Do not lay the sensor flat.