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Rapidit mini ph tester - How to test

I'v had a Rapidit mini ph tester for quite a few years.

Recently used it in the lawn in various areas and in the ericaceous compost which my camellia sits in a pot.

The lawn shows between 5 & 6 and the compost 5.

As old as this may be, would it accurate and how could I test it to check its accuracy. 
South Monmouthshire stuck in the middle between George and the Dragon

Posts

  • Ladybird4Ladybird4 Posts: 37,248
    Hi TerrysWorld. I'm assuming your pH tester is a probe. You could try dipping it in vinegar and you should get a reading of about pH 2.4.
    Cacoethes: An irresistible urge to do something inadvisable
  • TerrysWorldTerrysWorld Posts: 170
    Hi, Tried both Malt and White vinegar and the reading was between 4 and 5.

    This meter is a Rapitest a analog version with a moving needle and coloured background scale with the ph values.

    Sorry for the miss spelling. 
    South Monmouthshire stuck in the middle between George and the Dragon
  • Ladybird4Ladybird4 Posts: 37,248
    I think I would have concerns about its accuracy now TerrysWorld as it showed a similar pH for your compost and lawn soil.
    Cacoethes: An irresistible urge to do something inadvisable
  • Pete.8Pete.8 Posts: 11,135
    See what it says about the soil in your postcode area by tapping it in to this DEFRA related site.
    It covers England and Wales, but not Scotland.
    It seems accurate for me

    Billericay - Essex

    Knowledge is knowing that a tomato is a fruit.
    Wisdom is not putting it in a fruit salad.
  • TerrysWorldTerrysWorld Posts: 170
    Pete.8 said:
    See what it says about the soil in your postcode area by tapping it in to this DEFRA related site.
    It covers England and Wales, but not Scotland.

    Not totally true. Says we have free draining acid soil, where the soil is actually loamy clay with poor drainage which drys and cracks in summer and the Hydrangea's are more pink than blue.

    I will get a soil testing kit.

    thanks
    South Monmouthshire stuck in the middle between George and the Dragon
  • TerrysWorldTerrysWorld Posts: 170
    Tested an area in my garden with a Thompson & Morgan soil tester using a test tube and capsule and bottled water.

    From the test colour the soil has a pH of 8.0 (alkaline).

    Shows the Rapitest tester is totally incorrect and going into the bin.
    South Monmouthshire stuck in the middle between George and the Dragon
  • Ladybird4Ladybird4 Posts: 37,248
    Glad you got it sorted TW
    Cacoethes: An irresistible urge to do something inadvisable
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