Re: Explosion Proof Detection

["Bob La Londe" <none@xxxxxxxx>]

"nick markowitz" <nmarkowitz@xxxxxxxxx> wrote in message
news:ecef6e04-9224-40fc-9b81-0ff12c75cce0@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> On Jan 9, 3:31 pm, "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,
>> >> combustable
>> >> dusts or easily ignitable fibers or flyings. The SDI-77XL2-EX
>> >> electronic
>> >> assembly is configured to be easily inserted into a special
>> >> explosion-proof
>> >> enclosure. The unit is suitable for applications in Hazardous
>> >> Locations
>> >> 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
>> >> where
>> >> 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.  All in one cameras listed as explosion proof are not much more
>> 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 .

Yeppers.  I looked into that stuff when I did the quote for the video
system.