Re: Explosion Proof Detection

[nick markowitz <nmarkowitz@xxxxxxxxx>]

On Jan 9, 3:31=A0pm, "Bob La Londe" <n...@xxxxxxxx> wrote:
> "Jim" <alarmi...@xxxxxxx> wrote in message
>
> news:32756543-124a-4ed4-bd8e-3737e963d78b@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>
>
>
> > On Jan 9, 5:07 am, "Bill" <billnomailnosp...@xxxxxxxxx> wrote:
> >> SDI-77XL2-EX-OUT - MSRP: $3,270.00
> >> Outdoor Explosion-Proof Stereo Doppler Microwave Intruder Detector
>
> >> The SDI-77XL2-EX Model of Stereo Doppler was developed to protect
> >> Hazardous
> >> Locations due to the presence of flammable gasses or vapors, combustab=
le
> >> dusts or easily ignitable fibers or flyings. The SDI-77XL2-EX electron=
ic
> >> assembly is configured to be easily inserted into a special
> >> explosion-proof
> >> enclosure. The unit is suitable for applications in Hazardous Location=
s
> >> under the following classifications: Class I, Div. 1 & 2, Groups C,D,
> >> Class
> >> II, Div. 1 & 2, Groups E,F,G, Class III, NEMA 7CD, 9EFG. The unit is
> >> suitable for installations at petroleum refineries, chemical and
> >> petrochemical plants, storage areas and other processing facilities wh=
ere
> >> hazardous substances are handled or stored.
>
> > WOW ..... that's some price tag!
>
> > If the guy was sqawking at a video system price, a couple of these
> > ought to give him cardiac arrest!
>
> I agree. =A0All in one cameras listed as explosion proof are not much mor=
e
> than regular all in one weatherproof cameras of similar video specs.

I know when I do regular electrical work and its explosive proof in
nature it runs 4 to 6 times the cost of normal work.
plus you have all the special seals and elbows and fittings which run
hundreds of dollars.
I did a job where we installed a Mineral Spirits distillation unit and
we where able to keep main controller on a wall  of the next room so
it was out of the explosive zone but all pipes in and out had to be
sealed etc. to prevent vapors from migrating from one room to the
next.
Those seals must also be used even with low voltage runs if there is a
chance of a spark .