Humidity Meter?

Discussion in 'Motorhome Chat' started by Bobby22, Nov 26, 2014.

  1. Bobby22

    Bobby22 Funster

    Joined:
    Dec 15, 2013
    Messages:
    1,056
    Likes Received:
    3,176
    Location:
    Scotland
    I was pondering the use of a humidity meter in the van to help and keep condensation down. Has anyone got any experience of these.
    They look very cheap online.

    P&P

    [​IMG]
     
  2. Bailey58

    Bailey58 Funster Life Member

    Joined:
    Jun 23, 2010
    Messages:
    6,374
    Likes Received:
    9,648
    Location:
    Norfolk and Toftir.
    Been using one in our bedroom for a year or more after getting a man in to advise on a damp north wall. We put extra vents in and try not to breathe at night but apart from telling us the humidity it doesn't of course do anything. Less humid in the summer maybe but if we have a window open at night it's the same as outside, damp. Now reading 19.8 C and humidity of 65.
     
    • Like Like x 2
  3. tonka

    tonka Funster Life Member

    Joined:
    Jul 2, 2008
    Messages:
    5,333
    Likes Received:
    7,590
    Location:
    Cannock, Staffs or Benidorm, spain
    Dont waste your money, buy me some cider instead..!!
    It's tell you the humidity in the air... That's all.... So it's there to be looked at.. :)
    Let some cold moist air into the van and it will change..
    Not a fat lot of use... More ideal for people with greenhouses etc
     
    • Like Like x 1
  4. jenny and mitch

    jenny and mitch Funster

    Joined:
    Sep 16, 2010
    Messages:
    1,819
    Likes Received:
    1,572
    Location:
    Bungay Suffolk
    We have exactly the same one in the van.. £5 in Lidl.. Does nothing but inform.. We got it so that we could keep the van cool enough for the dog when we have to leave her for a while.... (( No she can't read it before anyone jumps in !!))
     
    • Like Like x 1
  5. Zains Pops

    Zains Pops Funster

    Joined:
    Sep 10, 2013
    Messages:
    718
    Likes Received:
    3,870
    Location:
    Chelmsford Essex
    :):unsure:All it's telling you is the water content of the air at the temperature stated. The amount of water saturated air 100% RH, can carry is very dependant on temperature, at below freezing it's hardly any,whilst at 40c it's lots. So that's why stuff goes mouldy real quick in the rain forest and lasts for years in near perfect condition in the Antarctic.
    An instrument telling you that the air is 65% saturated at 22.8c is next to useless as if the air dropped to near 0C then the same amount of water in the air would show as 100%RH and the opposite when warm at say 40c.
    I wouldn't bother buying it unless you are really interested in learning all about the science of psychometrics (the study of air and its moisture )
     
  6. Bobby22

    Bobby22 Funster

    Joined:
    Dec 15, 2013
    Messages:
    1,056
    Likes Received:
    3,176
    Location:
    Scotland
    What i thought it could tell me was the moisture in my van when parked up............I put my dehumidifier in the van immediately after our last trip (with plenty condensation on the screen that morning) it didn't collect anything in two hours.

    Bearing in mind that 65% RH in the van at 22 degrees means there is moisture in the air.
    I was worried that it might penetrate the internals when cold.
     
    Last edited: Nov 28, 2014
  7. John Laidler

    John Laidler Funster

    Joined:
    Jan 9, 2013
    Messages:
    8,578
    Likes Received:
    11,560
    Location:
    Plympton, Devon
    If it's cheap, give it a try, I have something similar but it has a max/min feature so you can see what the readings for both temperature and humidity reached overnight. I find the temperature reading much more useful but if you really did have a damp problem the humidity reading might be useful but I think you would be able to tell - condensation on the windows, smell of damp, the canary in a cage sneezing etc.
     
    • Like Like x 1
  8. Bobby22

    Bobby22 Funster

    Joined:
    Dec 15, 2013
    Messages:
    1,056
    Likes Received:
    3,176
    Location:
    Scotland
    I've ordered one £3.60 from a little man in China, if nothing else i can use it as an alarm clock.
     
    • Like Like x 1
Loading...

Share This Page