[Message Prev][Message Next][Thread Prev][Thread Next][Message Index][Thread Index]

Re: Tech Help!





"Jim" <alarminex@xxxxxxx> wrote in message
news:6912b086-63a1-492f-81bb-447e4bc39c2f@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
On Mar 6, 2:35?pm, "Doug" <n...@xxxxxxxx> wrote:
> "Spellcheck Patrol" <alarminst...@xxxxxxx> wrote in message
>
> news:be04f2c8-8d42-43e9-81a5-f3defeb77607@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> On Mar 4, 11:27 pm, Jim <alarmi...@xxxxxxx> wrote:
>
> >That's where those 72 beautiful LEDs come into play. Works in 0 lux
> >with an IR distance of 150 feet
>
> I've yet to see a low cost IR camera that in the real world performs
> anywhere close to what the manufacturers specifications claim. It seems
> common for the manufactures to grossly exagerate the performance of their
> LED equipped cameras.
>
> Doug

>I always quote half the distance claimed by the manufacturer.

The usable image may even be less than that, and to make it worse I'm not
sure that many people read the power requirements which may be 100-200mA
range in the daytime but could easily be in the 1.5 to 2.5 amp range at at
night when the LEDs come on, they then hang these things on the end of
several hundred feet of 22 gauge wire or cat5 with two pairs used for power
and wonder why they don't work properly.

Doug





alt.security.alarms Main Index | alt.security.alarms Thread Index | alt.security.alarms Home | Archives Home