Distance between sensors ?

Discussion in 'Motorhome Chat' started by joggerman, Feb 18, 2010.

  1. joggerman

    joggerman Read Only Funster

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    I've just bought a set of reversing sensors to fit to my van, and noticed that the recommended fitting distance between sensors is between 30 - 40cm.
    As my van is 7' 6" wide I would need to exceed the 40cm by a fair bit to give even coverage.

    What distance do you have between your sensors, and do you see any problems by increasing it as mentioned?
     
  2. Peter James

    Peter James Read Only Funster

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    The problem is that their field of vision (which sweeps out in an arc from the sensor) is only about 90 degrees. So anything outside that field is not seen. The more sensors you have, the less blind spots and the more chance of seeing an obstacle. Wider vehicles like motorhomes would normally have 4 sensor kits, I bought one such kit on ebay for about £20.
     
  3. joggerman

    joggerman Read Only Funster

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    The kit I bought is a 4 sensor kit, which at 40cm adds up to 160cm between the outside sensors. As the motorhome is 230 cm wide it would leave the corners unprotected if I stick to the 40 cm maximum.
     
  4. hilldweller

    hilldweller Funster Life Member

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    FWIW my MH dictated the positioning. Two right at the corners and one either side of the number plate.

    It seems to work.
     
  5. Geo

    Geo Trader - Funster

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    It will be OK to space equally out to suite the motor home:thumb:
    Making sure the corners are well catered for, there may of course be small blind spots that may allow collision with small concrete posts etc.
    Short of fitting two kits you wont get full guaranteed coverage
    They are after all reversing aids not an auto pilot:Doh:
    there is no substiute for looking where your going first:RollEyes:
     
  6. Peter James

    Peter James Read Only Funster

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    The new Sevel (like mine) vans have 4 sensor kits as a factory fitted option, so when you take of the rear plastic bumper to fit the kit the holes are marked for them moulded into the plastic, and holes already made in the inner metal bumper that reinforces the plastic one. Mine measures 20cm from the edge of the van, then 47cm, then 59cm, then 47cm then 20cm. Exact measurements are not critical. There will always be some blind spots like if you reverse up to a narrow post that is between 2 sensors it will disappear from their view when you get very close to it. But a 4 sensor kit should still serve your van well enough. Hope that helps :Smile:
     
  7. Scotties

    Scotties Funster Life Member

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    Sensors ...

    Hi Joggerman, fit the 4 sensor kit and spread them a little, (got mine from e-bay about £15), and they work a treat,:thumb:although as one of the guys said, they are a aid, use the mirrors/rev cam as well,

    Regards Richard
     
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