WS69/WH40 Rain Gauge Accuracy Issue Check Listing


WS69/WH40 Rain Gauge Accuracy Issue Check Listing

Tipping bucket rainfall sensor working principle: rain falls into the receiving funnel, through the funnel into the tipping bucket. When the rain reaches a certain amount (WS69 for 0.254mm, WH40 for 0.1mm), the tipping bucket loses balance and tumbles over. Every time it tumbles, the switch will turn on the circuit and send a pulse signal to the recorder, which will record the amount of rainfall and so on so that the rainfall process can be measured.

If you find that the rain gauge data is not accurate enough, please follow the steps below to check your instrument:

  • Check to see if any debris, such as leaves, bird droppings, etc., has fallen into the rainfall funnel. If so, please clean it up; debris will affect the rainfall measurement.If the data has returned to normal, the problem has been resolved.
  • If there is no debris in the funnel, you can use the weather map on the ecowitt website or other weather websites to check the rainfall data from several points around your area and use this data to cross-check that your rainfall is accurate. Do not just look at the rainfall at a point near you, as the rainfall at a single point will not confirm the accuracy of your sensor. The rainfall is unevenly distributed.If your rain gauge data is within reasonable limits, the problem has been resolved.
  • Test the counting function, syringe/measuring cup to receive a small amount of water, slowly drip onto the tipping bucket, hear a slight ringing sound, see whether the APP has increased 0.2mmor 0.1mm (WS69 for 0.2mm, WH40 for 0.1mm) rain. If 0.2mm or 0.1mm of rain is added (WS69 for 0.2mm, WH40 for 0.1mm), the rain gauge usually operates. Please do not pour in water quickly, as it will cause the tipping bucket not to rotate back into position, and rainfall will not be measured.
  • You can also manually simulate rainfall and drip the water slowly. If you simulate heavy rain (100mm/h), you need to drip 100ml ( for ws69) or 245ml ( for wh40)of water into the tipping bucket for 6 minutes at an even rate. The display should show 10mm rainfall; If you simulate medium rain (10mm/h), you need to drip 50ml (for ws69) or 123ml ( for wh40) of water into the tipping bucket for 30 minutes at an even rate. The display should show 5mm of rainfall. When you are done, check the app to see if the corresponding amount of rain has been added.
  • After checking, the rain data is still inaccurate. The internal parts may be damaged. Please contact after-sales to request a replacement rain gauge body.



Light rain: precipitation intensity less than 2.5mm/24h.

Moderate rain: precipitation intensity between 2.5-10mm/24h.

Heavy rain: precipitation intensity between 10-50mm/24h.

Torrential rain: precipitation intensity between 50-100mm/24h.

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looks it has got lost in the accessories section – write an email to telling that the siral has disappeared and ask for their advice how to get it

Bobby Jeffers

I need to order a funnel debris spring for the tipping gauge. Please help.

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