Soil pH testers that are sold for garden use do not have enough accuracy to be of much help.
Do Soil pH Testers Work?
Soil pH testers which are produced for the general public are not very useful for gardeners for several reasons:
1) they are not accurate enough
2) it is very difficult to change the pH of your soil
pH testers that have been designed for the garden are not very accurate, as has been discussed in Soil pH Testers – Are They Accurate? If you really want to know the accurate pH of your soil have it tested by a professional lab. Their meters work and are accurate.
As discussed in a previous post about soil pH, it is not important to know the accurate pH of your soil. However it is valuable to have an approximate idea of the pH so that you can select your plants correctly. The best way to get this information is to talk to your neighbors. Are they successful with acid loving plants like rhododendrons, and blueberry bushes? If they are, the local soil is acidic. If they are not, it is probably neutral or alkaline. That is close enough for you to select plants.
1) Photo Source for ‘electronic soil pH meter’: London Permaculture