We Challenge Wireless
Wrist Strap Manufacturers!!!!!!
October 27, 2005
Send in yours for evaluation
if you dare!
Go ahead, Make our Day!
If we are Wrong, we will put
up an apology and a free advertisement for one year.
reports of another wireless wrist strap being sold brings up a question
from our readers: "Do they work?" The article listed below
was published a few years ago when our labs evaluated one style
of wireless wrist strap. We found no evidence that they do or ever
could significantly reduce the charges on a person. This new one
reports it works on the "Selglard" principle. To quote:
"It operates "Selglard' electric
halo principles, making body's static electricity to discharge through
Does anyone know what that is? A few prepositions in the statement
might help us understand.
Most wireless wrist straps try to use
passive ionization even if they do not recognize what they are stating.
The problem with passive ionization is that it is distance and potential
related. We have never seen a passive ionizer reduce a charged body
below 1000 Volts in the best of conditions. The new strap even states
that it is not for use in dry climates. We do not believe it is
for use in any climates.
At the ESD Journal, we have developed a new more
effective personnel neutralization system. It operates on the Fowler
Halo Principle. Price for this device starts at $15
depending on head size. Note the stylishness of the device. It comes
with an optional "pony tail" addition for higher efficiency
at an additonal price.
We will soon have our version of the wireless wrist
strap,which will sell for $5 and also comes with the high efficiency
"pony tail" addition.
The following is an artice we published
a few years ago. We stand by it now.
Evaluation of Wireless Wrist
by: ESD Journal Lab
We have been asked many times over
the past few years about the viability of wireless wrist straps.
The following is our evaluation of one wireless wrist strap.
We used a wireless wrist strap that
is advertised as:
"It operates using a combination
of several physics phenomena like "Ion Neutralization, Skin
Effect, Point Discharge and Corona Discharge Effect" combined
with the principle of differential potential to collect and dissipate
It is a combination of bio-industrial
and electronic technologies.
In effect, the wireless wrist
strap neutralizes over 80% of the static electricity on a human
body and maintains the potential of a human body below 150V which
is low enough to protect electronic components."
is a summary of our evaluation of the strap:
The wrist strap came with a conventional cord for
use at the workbench. However, it is claimed to neutralize the static
on a person without the cord attached "after 15 seconds."
Our tests showed that the wrist strap when
connected by it cord had a resistance from the wearer's hand
to ground of 1.3 MegOhms.
Our technician wore insulative shoes (> 10,000
MegOhms) and walked on an insulative floor.
We charged the technician to 2,000 volts.
When and he walked around with the uncorded
wrist strap on, we saw a decay of the static charge to about
1,000 Volts in 90 seconds.
When and he walked around without the wrist
strap, we saw a decay of the static charge to about 1,000 Volts
in 90 seconds.
There was no difference in the time to decay
to 1,000 with or without the wrist strap in place.
With the wrist strap on the walking technician,
his potential never went below 700 volts for over 3 minutes.
We dissected the wrist strap to see what inside would
account for the claimed neutralization. We found only a 1 MegOhm
resistor. This supports our findings that the wireless wrist strap
no method for neutralizing a person not connected to ground by a
It is our opinion that no currently available methods
or devices exist which will effectively ground a person without
a tethered cord to ground or at least a large capacitance.
Sorry! Something that sounds too
good to be true probably is.