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5.9 Sensor Placement
It is recommended you mount the remote sensor outside on a north facing wall, in a shaded area, at a
height at or above the receiver. If a north facing wall is not possible, choose a shaded area, under an
eve.
Direct sunlight and radiant heat sources will result in inaccurate temperature readings. Although the
sensor is weatherproof, it is best to mount in a well-protected area, such as an eve.
1. Use a screw or nail to affix the remote sensor to the wall, as shown in Figure 13.
2. Hang the remote sensor up on string, as shown in Figure 14.
Note: Make sure the sensor is mounted vertically and not lying down on a flat surface. This will
insure optimum reception. Wireless signals are impacted by distance, interference (other weather
stations, wireless phones, wireless routers, TVs and computer monitors), and transmission barriers,
such as walls. In general, wireless signals will not penetrate solid metal and earth (down a hill, for
example).
5.10 Best Practices for Wireless Communication
Wireless communication is susceptible to interference, distance, walls and metal barriers. We
recommend the following best practices for trouble free wireless communication.
1. Electro-Magnetic Interference (EMI). Keep the tablet several feet away from computer monitors
and TVs.
2. Radio Frequency Interference (RFI). If you have other 433 MHz devices and communication is
intermittent, try turning off these other devices for troubleshooting purposes. You may need to relocate
the transmitters or receivers to avoid intermittent communication.
3. Line of Sight Rating. This device is rated at 300feet line of sight (no interference, barriers or walls)
but typically you will get 100feet maximum under most real-world installations, which include passing
through barriers or walls.
4. Metal Barriers. Radio frequency will not pass through metal barriers such as aluminum siding. If
you have metal siding, align the remote and tablet through a window to get a clear line of sight.
The following is a table of reception loss vs. the transmission medium. Each “wall” or obstruction
decreases the transmission range by the factor shown below.
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