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Replacement for the standard rain gauge ... ???

For discussion of DIY weather equipment - sensors, accessories, improvements to existing kit etc
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odintheterrible
Posts: 28
Joined: Wed Jan 16, 2013 8:18 am
Weather Station: Aercus WS3083 Wireless
Operating System: Windows 10 64-bit
Location: Torre-Pacheco, Murcia, Spain

Replacement for the standard rain gauge ... ???

Postby odintheterrible » Thu Feb 01, 2018 8:16 am

Greetings one and all,

Since relocating to Spain our WS3083 (Fineoffset) the station has been operating reasonably well ... except for the standard rain gauge.

It works OK when the rain is fairly constant and heavy, but this Spring has been relatively dry, with what can only be best termed as light mizzal/drizzle which is enough to leave small pools of water on the swimming pool cover, and the patio tiles to be visibly wet/damp etc ... but the rain gauge on the weather station (standard tipping bucket type) seems incapable of registering it.

I'm toying with the idea of buying a stand-alone rain gauge but before I do that, I would be interested to know if anyone has discovered or made a suitable replacement for the standard Fineoffset unit or if there is a modification which will improve the accuracy of the standard unit ??

Thanks

sfws
Posts: 372
Joined: Fri Jul 27, 2012 11:29 am
Weather Station: Maplin based, but customised
Operating System: off-line Vista and W10 PCs
Location: UK

Re: Replacement for the standard rain gauge ... ???

Postby sfws » Thu Feb 01, 2018 5:53 pm

You might want to read an old topic http://sandaysoft.com/forum/viewtopic.php?f=13&t=6941 about accuracy
or http://sandaysoft.com/forum/viewtopic.php?f=13&t=5630 about modifications

AllyCat
Posts: 1015
Joined: Sat Feb 26, 2011 1:58 pm
Weather Station: Fine Offset 1080/1 & 3080
Operating System: Windows XP SP3
Location: SE London

Re: Replacement for the standard rain gauge ... ???

Postby AllyCat » Thu Feb 01, 2018 6:21 pm

Hi,

I did experiment with adding a 14 cm diameter plastic funnel above the normal FO rain sensor with the aim of achieving 0.1mm per tip. But to be honest it was rather a failure because the rain collected in beads in the funnel (even though it had much steeper sides than the FO) and didn't give an earlier warning of the onset of rain. I guess it might be equally unsuccessful recording small showers in low humidity, with the droplets evapourating before running down into the sensor.

I had planned to experiment with a metal funnel and/or a water-dispersant such as "Rain-X", but sorry, not tried yet.

Another possibility might be the Hydreon RG11 rain sensor which was discussed on the forum some years ago and is supported in real time (no logger) by Cumulus 1. Ideal for an "it's (started) raining" warning or it can emulate a ridiculously small tipping bucket (0.01 mm or less). But it's unlikely to have the accuracy of a tipping bucket and requires a significant power supply, not compatible with a simple battery power supply, even with a modest solar panel.

Cheers, Alan.


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