Your Professional Rain Gauge measures rainfall in millimetres over a set period, usually 24 hours. Just like commercial rain gauges, it has a housing (outer cylinder) to protect the measuring cylinder inside. The top of the gauge or funnel, has a larger surface area than the top of the measuring cylinder. The extra rainwater collected makes it easier to read the measuring cylinder and improves accuracy.
- Catches up to 250mm of rainfall
- Easy to read 1mm increments
- Large funnel for improved rainfall catchment
- Outer cylinder catches rainwater overflow
1. Remove inner cylinder from gauge. Where rainfall has been extra heavy and has overflowed into the outer cylinder, follow the note below.
2. If you only have rainfall in your inner cylinder, simply measure the water in the rain gauge and record on your rainfall chart.
For more accurate results, install the rain gauges in pairs at 6 metre spacings, and record the average of the gauges. This reduces the effect of strong winds on your results.
NOTE: Measure the water in the inner cylinder, record amount on spare paper and empty the gauge. Then take the rain contained in the outer cylinder and pour into the inner cylinder, measure and add the measurements from the inner and outer tubes together, record on the rainfall chart.
- The gauge needs to be mounted on a support or pole that doesn’t move or wobble.
Flimsy poles, especially long ones, can move around in the wind. In certain circumstances, the wobbling motion can cause the bucket to tip, thereby falsely reporting rain.
- The Rain gauge has a shallow funnel. Rain droplets, particularly large ones, are prone to splattering off the edge after hitting the funnel. In very heavy rain, the gauge may under report the amount of rain.
- Ensure the collecting cup is free of debris, this can block the hole, if this happens water cannot drain into measuring cup.
- It is 0.3mm per tip for WS3081,WS1000 and WS109A.
- It is 0.8mm per tip for WS5029.
- Check that the batteries are not flat and change if necessary.
- Unplug from sensor and leave a few minutes, check that the terminals are clean and not rusty, then plug in again and reset.