Your Rain Gauge Wedge measures rainfall in millimetres over a set period, usually 24 hours. The top of the gauge has a larger surface area that tapers at the base of the wedge.
The measurements are graduated with greater spacing between increments which allows for improved accuracy when measuring small amounts.
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Attach the Rain Gauge to a post in a safe location where there will be no run off from trees or roofs.
The minimum distance is at least twice the distance away from the tallest structure. For best results, make sure the gauge is straight and vertical, and located as close to the ground as possible.
Record results of the Rain Gauge at the same time every day. Water in the container will produce a curved surface, called a ‘meniscus’. Always take the reading from the base of the meniscus and at eye level.
For more accurate results, install the rain gauges in pairs at six meter spacings and record the average of the gauges. This reduces the effect of strong winds on your results. A rainfall chart is included for recording your results.
My rain gauge is not accurate?
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