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  1. #11
    Join Date
    Jun 2019
    Location
    Scarborough
    Posts
    635

    Default Re: Battery powered bilge alarm?

    Quote Originally Posted by fisherman View Post
    Which one.....? This is an air pressure version, under £50.
    https://www.gaelforcemarine.co.uk/en...BoCSe4QAvD_BwE
    I meant using an air pressure one.

  2. #12
    Join Date
    Dec 2005
    Location
    Far S. Cornwall
    Posts
    13,344

    Default Re: Battery powered bilge alarm?

    Quote Originally Posted by Ohlin Karcher View Post
    I meant using an air pressure one.
    You can DiY that one for a very few quid, OK for an alarm, but you need a bigger, eg Gael Force one to run the pump. Likewise the bilge switch I linked to, not enough capacity to run the pump, just the alarm.

  3. #13
    Join Date
    Aug 2002
    Location
    Cambridge
    Posts
    2,504

    Default Re: Battery powered bilge alarm?

    Quote Originally Posted by fisherman View Post
    You can DiY that one for a very few quid, OK for an alarm, but you need a bigger, eg Gael Force one to run the pump. Likewise the bilge switch I linked to, not enough capacity to run the pump, just the alarm.
    I now use instrumentation float switches, a low and a high level, and put them to relays to run pumps. More reliable than dedicated float switches, smaller and the wires come from a potted assembly that doesn’t move. I also have a high high switch connected to a general alarm mounted at the chart table.

  4. #14
    Join Date
    Dec 2005
    Location
    Far S. Cornwall
    Posts
    13,344

    Default Re: Battery powered bilge alarm?

    One problem, as i see it, is using a float switch to run the pump involves another set of connections with a high amperage, through the switch. I never liked them, and the pumps with short wires are a pain. Johnson pumps, from these people
    https://www.pumpinternational.com/products.aspx
    proved the best in all ways, changed once in 25 years.

  5. #15
    Join Date
    Jun 2019
    Location
    Scarborough
    Posts
    635

    Default Re: Battery powered bilge alarm?

    Thanks for all your advice Fisherman!

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