13
Metal Barriers.
Radio frequency will not pass
through metal barriers such as aluminum siding or
metal wall framing. If you have such metal
barriers and experience communication problems,
you must change the placement of sensor package
and or console.
The following table shows different transmission
media and expected signal strength reductions. Each
“wall” or obstruction decreases the transmission range
by the factor shown below.
Medium
RF Signal Strength Reduction
Glass (untreated)
5-15%
Plastics
10-15%
Wood
10-40%
Brick
10-40%
Concrete
40-80%
Metal
90-100%
Table 3: RF Signal Strength reduction
