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For decades, professional security companies have been installing
hardwired (“fishing” wires through walls and concealed spaces) security
devices in both new and existing homes and businesses. When done correctly,
there is no evidence of the installed wiring and the devices (Door and
window contacts, motion detectors, etc) are small, unobtrusive, and, quite
often, unseen. The professional installer is able to get wires around
without making “gaping holes” or requiring patching.
Today we can also offer “wireless” equipment to our customers. These devices
are battery operated sensors and switches with built in radio transmitters.
The radio signals send information to the control, eliminating the need for
installing wires in a building. Sounds great!!! But is it really best for
you?
Lets look at the advantages of each and let you be the judge.
Hardwired advantages.
1) Quality – In order to price a wireless device to be competitive with the
cost of a hardwired device and the labor required to install it, the
manufactures must produce a combination unit ( a motion detector and a radio
transmitter, for instance) and keep these costs below a certain dollar
level. This, generally, results in two lower quality devices with fewer
operating and detection features. The reduction of these features tend to
increase the likelihood of false alarms and decrease the likelihood of the
unit doing its job of detecting an intruder or other emergency situation
2) Reliability – Again, due to cost concerns the products will generally
contain the least expensive components available. Electronic components do
break down, and the percentage of breakdowns are directly related to the
quality of the electronic components used. Undoubtedly, you have purchased
an inexpensive electronic device (a wireless telephone, transistor radio,
etc.) and experienced a rapid decline of it’s performance, if not poor
performance right out of the box. Unfortunately, the poor performance or
total failure of a security device may not be evident until it is too late
and the damage or loss has already occurred.
3) Longevity - Wireless devices have a shorter life expectancy and a higher
failure rate than that of there hardwired counterparts. Therefore, you will
spend more over the years to keep a wireless system operating, than you
would a hardwired system. That is, if you can replace the part at all, see
“Availability” below.
4) Availability – Wireless devices are “proprietary”, that is the devices
must all match and are manufactured by one company. Should a device need
replacement, you would have to buy the same product from the same
manufacturer. That is, of course, assuming that the manufacturer is still
around, and that they are still making that particular line of product.
Otherwise, you would have to purchase an entirely new system. Hardwired
systems are “standardized” and any single device will usually work with any
other device, regardless of who makes the product.
5) Replacement Costs – Because wireless devices are “combination units”,
should replacement be necessary (assuming that this particular product is
still available) the cost to replace a defective wireless unit will be
between 2 and 10 times that of a comparable hardwired device.
6) Batteries – All wireless detection devices rely on batteries and only
batteries for their power. These batteries must be replace regularly, adding
to your annual cost (typical annual cost is between $50.00 and $100.00,
assuming you replace them yourself).
Adaptability – Wireless units rely on “clear air space” between the
detection device and the receiver / controller. While the radio signals
penetrate walls and floors with relative reliability, other items such as
televisions, cabinets, mirrors, etc. can drastically reduce or eliminate the
ability for the device to communicate with the control.
Wireless Advantages
1) Ease of Installation - Requires less time to install and can be done by
an individual with minimal skills.
2) Removal / Relocation - The units can be easily removed and relocated
without any special tools or knowledge. (may not be an advantage if done
maliciously, or if temporarily removed and forgotten, because the units will
still communicate as if they are installed, even when stored in a box or
closet)
3) Cost – The reduced time and skill level needed to complete an
installation, may, in some cases, result in a lower installation cost.
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