Calibrating a Tipping Rain Gauge

TechnoLine Rain GaugeMost ‘electronic’ rain gauges used these days for rain monitoring for the IoT world, use a ‘tipping’ bucket see-saw mechanism. If you are using one of these with the original display, then that’s fine, nothing to do.

If on the other hand, like me, your weather station electronics have died, then you maybe reconsidering ‘up cycling’ the actual rain sensor for your latest IoT project. In this case, you will need to ‘calibrate’ your tipping bucket sensor so you know how much rain has passed through it.

There are several articles on the Internet for doing this, so why write another?  Well most are written and miss off some of the important stages and processes, making it difficult to achieve.  So I have tried to be a little more helpful and complete….

Read more… “Calibrating a Tipping Rain Gauge”

Stainless Air Sourced Heat Pumps

Heat Pump
Stainless Steel Air Sourced Heat Pump

ThreeOrbs are now pleased to be able to offer fully stainless steel air-sourced heat pumps to Orkney residents.  These are an ideal choice for the harsh Orcadian weather, for either new systems, replacements, upgrades or complementation use.  They come with a full 5 year warranty and have an expected operational life of around 20 years.  Output capacities from 6.8KW through to 500KW.  Installed prices from £2,500 (+VAT)*.

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Proportional Heating Valve

My prototype control circuitry for a cheap proportional hydronic central heating diverter/blender valve is progressing well.

The MkI version worked well with just mechanical switches.  Producing a valve which can be set and held in any position of its normal rotational path.  This now allows me to produce a CT (Constant Temperature) valve and control unit for well under £100.  A significant saving on current units,which sell for several hundred pounds.

Read more… “Proportional Heating Valve”


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