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Temporary alarm

Discussion in 'Alarms, CCTV & Telephones' started by Norcon, 8 Jun 2012.

  1. Norcon

    Norcon

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    Is it possible to have a temporary lash up alarm operated from a battery source that would send an alarm signal about 800m over a hill from the site to the owners home?

    When the timber first went to site the farmer did nightly patrols between 12.00am and 4.00am armed only with his shotgun. Obviously he didn't get much sleep.
    We had the diesel siphoned from our digger so far and the battery stole and are now expecting the big one.
    Thanks.

    Edit.
    After some googling I found this.....
    http://www.ultrasecuredirect.com/acatalog/SB_Solar_Powered_Perimeter_Alarm.html

    Looks just the ticket. What do you think? :D
     
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  3. Workers

    Workers

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    Better a speech dialler than SMS.
    The ranges in that advert are for the detection distances
    in a straight line. That will only detect from one side of the property too. You would need 4 sets to cover around the area.
    There are smaller items that could be used with a large leisure battery and solar power.
    More cost effective for a temp "lash up".
     
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  4. Norcon

    Norcon

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    Would a wireless alarm signal repeater transmitter of the same wave length boost the signal enough to trigger the alarm on the receiver?
     
  5. Workers

    Workers

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    Not sure what you mean?
    Is it to extend the beams distances? If so no.
    You would go back to back with another pair to exceed those stated or find one that works longer. But, mist and fog will affect them probably. Maybe other methods of ground/perimeter detection should be considered.
     
  6. Norcon

    Norcon

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    No. Extend the 900m range. :D Or give it more oomph to get over the hill and overcome harsh propagation conditions limiting practical operation range. :D

    What does this do......
    http://wisehouse.co.uk/signal-booster-range-expander-repeater-433

    I might buy some of this stuff and experiment with it over long distances. :mrgreen:
     
  7. bernardgreen

    bernardgreen

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  8. OwainDIYer

    OwainDIYer

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    I assume this is a building site - in which case the machinery and stock is going to run into tens of thousands of £s?

    I would be looking at IP CCTV cameras with internal software motion detection, recording onto internal memory cards, with a GSM dial-up router, acting on motion detection, sending video to your smartphone. This would give you live video of any alerts, together with audio challenge so you can shout at them over speakers. That will usually put people off. However if it doesn't the live video means you can call plod out immediately as you have confirmation of intruders.

    All working off a couple of car batteries that you swap over for recharging.

    Yes it will cost a couple of £thousand.
     
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